EX-4.1



 Exhibit 4.1 

EXECUTION VERSION 
  

 
 LEVEL 3 PARENT, LLC, 

as Guarantor, 
 LEVEL 3 FINANCING,
INC., 
 as Issuer, 
 and 

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., 

as Trustee 
  

 
 Indenture 

Dated as of January 13, 2021 
  

 
 3.750%
Sustainability-Linked Senior Notes Due 2029 
  
  







 TABLE OF CONTENTS 
  

							
	 	 	 	  	Page	 
	
	ARTICLE ONE	  

	
	DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION	  

			
	 SECTION 101.
	 	 Definitions
	  	 	2	 
	 SECTION 102.
	 	 Compliance Certificates and Opinions
	  	 	27	 
	 SECTION 103.
	 	 Form of Documents Delivered to Trustee
	  	 	28	 
	 SECTION 104.
	 	 Acts of Holders
	  	 	28	 
	 SECTION 105.
	 	 Notices to Trustee and the Issuer
	  	 	29	 
	 SECTION 106.
	 	 Notice to Holders; Waiver
	  	 	30	 
	 SECTION 107.
	 	 Effect of Headings and Table of Contents
	  	 	31	 
	 SECTION 108.
	 	 Successors and Assigns
	  	 	31	 
	 SECTION 109.
	 	 Separability Clause
	  	 	31	 
	 SECTION 110.
	 	 Benefits of Indenture
	  	 	31	 
	 SECTION 111.
	 	 Governing Law
	  	 	31	 
	 SECTION 112.
	 	 Trust Indenture Act
	  	 	31	 
	 SECTION 113.
	 	 Legal Holidays
	  	 	31	 
	 SECTION 114.
	 	 No Personal Liability of Directors, Officers, Employees and Stockholders
	  	 	32	 
	 SECTION 115.
	 	 Independence of Covenants
	  	 	32	 
	 SECTION 116.
	 	 Exhibits
	  	 	32	 
	 SECTION 117.
	 	 Counterparts
	  	 	32	 
	 SECTION 118.
	 	 Duplicate Originals
	  	 	32	 
	 SECTION 119.
	 	 Waiver of Jury Trial
	  	 	32	 
	 SECTION 120.
	 	 Force Majeure
	  	 	32	 
	 SECTION 121.
	 	 FATCA
	  	 	33	 
	 SECTION 122.
	 	 Submission to Jurisdiction
	  	 	33	 
	 SECTION 123.
	 	 Limited Condition Transactions
	  	 	33	 
	 SECTION 124.
	 	 Electronic Signatures
	  	 	34	 
	
	ARTICLE TWO	  

	
	SECURITY FORMS	  

			
	 SECTION 201.
	 	 Form and Dating
	  	 	34	 


  
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	ARTICLE THREE	  

	
	THE SECURITIES	  

			
	 SECTION 301.
	 	 Amount of Securities
	  	 	35	 
	 SECTION 302.
	 	 Execution and Authentication
	  	 	35	 
	 SECTION 303.
	 	 Security Registrar and Paying Agent
	  	 	36	 
	 SECTION 304.
	 	 Paying Agent To Hold Money in Trust
	  	 	36	 
	 SECTION 305.
	 	 Holders Lists
	  	 	36	 
	 SECTION 306.
	 	 Replacement Securities
	  	 	37	 
	 SECTION 307.
	 	 Temporary Securities
	  	 	37	 
	 SECTION 308.
	 	 Cancellation
	  	 	37	 
	 SECTION 309.
	 	 Defaulted Interest
	  	 	37	 
	 SECTION 310.
	 	 CUSIP Numbers
	  	 	37	 
	
	ARTICLE FOUR	  

	
	SATISFACTION AND DISCHARGE	  

			
	 SECTION 401.
	 	 Satisfaction and Discharge of Indenture
	  	 	38	 
	 SECTION 402.
	 	 Application of Trust Money
	  	 	39	 
	
	ARTICLE FIVE	  

	
	REMEDIES	  

			
	 SECTION 501.
	 	 Events of Default
	  	 	39	 
	 SECTION 502.
	 	 Acceleration of Maturity; Noteholder Direction; Rescission and Annulment
	  	 	40	 
	 SECTION 503.
	 	 Collection of Indebtedness and Suits for Enforcement by Trustee
	  	 	42	 
	 SECTION 504.
	 	 Trustee May File Proofs of Claim
	  	 	43	 
	 SECTION 505.
	 	 Trustee May Enforce Claims Without Possession of Securities
	  	 	43	 
	 SECTION 506.
	 	 Application of Money Collected
	  	 	44	 
	 SECTION 507.
	 	 Limitation on Suits
	  	 	44	 
	 SECTION 508.
	 	 Unconditional Right of Holders to Receive Principal, Premium and Interest
	  	 	44	 
	 SECTION 509.
	 	 Restoration of Rights and Remedies
	  	 	45	 
	 SECTION 510.
	 	 Rights and Remedies Cumulative
	  	 	45	 
	 SECTION 511.
	 	 Delay or Omission Not Waiver
	  	 	45	 
	 SECTION 512.
	 	 Control by Holders
	  	 	45	 
	 SECTION 513.
	 	 Waiver of Past Defaults
	  	 	46	 
	 SECTION 514.
	 	 Waiver of Stay or Extension Laws
	  	 	46	 
	 SECTION 515.
	 	 Undertaking for Costs
	  	 	46	 


  
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	ARTICLE SIX	  

	
	THE TRUSTEE	  

			
	 SECTION 601.
	 	 Certain Duties and Responsibilities
	  	 	47	 
	 SECTION 602.
	 	 Notice of Default
	  	 	48	 
	 SECTION 603.
	 	 Certain Rights of Trustee
	  	 	48	 
	 SECTION 604.
	 	 Trustee Not Responsible for Recitals or Issuance of Securities
	  	 	50	 
	 SECTION 605.
	 	 May Hold Securities
	  	 	50	 
	 SECTION 606.
	 	 Money Held in Trust
	  	 	50	 
	 SECTION 607.
	 	 Compensation and Reimbursement
	  	 	50	 
	 SECTION 608.
	 	 Corporate Trustee Required; Eligibility; Conflicting Interests
	  	 	51	 
	 SECTION 609.
	 	 Resignation and Removal; Appointment of Successor
	  	 	51	 
	 SECTION 610.
	 	 Acceptance of Appointment by Successor
	  	 	52	 
	 SECTION 611.
	 	 Merger, Conversion, Consolidation or Succession to Business
	  	 	53	 
	
	ARTICLE SEVEN	  

	
	CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE	  

			
	 SECTION 701.
	 	 Limitations on Certain Consolidation Transactions by Level 3 Parent
	  	 	53	 
	 SECTION 702.
	 	 Successor Level 3 Parent Substituted
	  	 	54	 
	 SECTION 703.
	 	 Limitations on Certain Consolidation Transactions by Issuer
	  	 	54	 
	 SECTION 704.
	 	 Successor Issuer Substituted
	  	 	55	 
	 SECTION 705.
	 	 Limitations on Certain Consolidation Transactions by Guarantor (other than Level 3
Parent)
	  	 	56	 
	 SECTION 706.
	 	 Successor Guarantor Substituted
	  	 	56	 
	 SECTION 707.
	 	 Limitations on Certain Consolidation Transactions by Offering Proceeds Note Guarantor
	  	 	57	 
	
	ARTICLE EIGHT	  

	
	SUPPLEMENTAL INDENTURES	  

			
	 SECTION 801.
	 	 Supplemental Indentures Without Consent of Holders
	  	 	57	 
	 SECTION 802.
	 	 Supplemental Indentures With Consent of Holders
	  	 	58	 
	 SECTION 803.
	 	 Execution of Supplemental Indentures
	  	 	59	 
	 SECTION 804.
	 	 Effect of Supplemental Indentures
	  	 	60	 
	 SECTION 805.
	 	 Reference in Securities to Supplemental Indentures
	  	 	60	 
	 SECTION 806.
	 	 Notice of Supplemental Indentures
	  	 	60	 


  
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	ARTICLE NINE	  

	
	COVENANTS	  

			
	 SECTION 901.
	 	 Payment of Principal, Premium, if Any, and Interest
	  	 	60	 
	 SECTION 902.
	 	 Maintenance of Office or Agency
	  	 	60	 
	 SECTION 903.
	 	 Money for Security Payments to Be Held in Trust
	  	 	61	 
	 SECTION 904.
	 	 Existence
	  	 	62	 
	 SECTION 905.
	 	 Reports
	  	 	62	 
	 SECTION 906.
	 	 Statement by Officers as to Default
	  	 	64	 
	 SECTION 907.
	 	 Change of Control Triggering Event
	  	 	64	 
	 SECTION 908.
	 	 Limitation on Debt
	  	 	66	 
	 SECTION 909.
	 	 Limitation on Priority Debt
	  	 	70	 
	 SECTION 910.
	 	 Limitation on Liens
	  	 	71	 
	 SECTION 911.
	 	 Limitation on Sale and Leaseback Transactions
	  	 	72	 
	 SECTION 912.
	 	 Limitation on Designations of Unrestricted Subsidiaries
	  	 	73	 
	 SECTION 913.
	 	 Limitation on Actions with respect to Existing Intercompany Obligations
	  	 	74	 
	 SECTION 914.
	 	 Covenant Termination
	  	 	75	 
	 SECTION 915.
	 	 Authorizations and Consents of Governmental Authorities
	  	 	75	 
	
	ARTICLE TEN	  

	
	REDEMPTION OF SECURITIES	  

			
	 SECTION 1001.
	 	 Right of Redemption
	  	 	76	 
	 SECTION 1002.
	 	 Applicability of Article
	  	 	76	 
	 SECTION 1003.
	 	 Election to Redeem; Notice to Trustee
	  	 	76	 
	 SECTION 1004.
	 	 Selection by Trustee of Securities to Be Redeemed
	  	 	77	 
	 SECTION 1005.
	 	 Notice of Redemption
	  	 	77	 
	 SECTION 1006.
	 	 Deposit of Redemption Price
	  	 	78	 
	 SECTION 1007.
	 	 Securities Payable on Redemption Date
	  	 	78	 
	 SECTION 1008.
	 	 Securities Redeemed in Part
	  	 	78	 
	
	ARTICLE ELEVEN	  

	
	DEFEASANCE AND COVENANT DEFEASANCE	  

			
	 SECTION 1101.
	 	 Issuer’s Option to Effect Defeasance or Covenant Defeasance
	  	 	79	 
	 SECTION 1102.
	 	 Defeasance and Discharge
	  	 	79	 
	 SECTION 1103.
	 	 Covenant Defeasance
	  	 	80	 
	 SECTION 1104.
	 	 Conditions to Defeasance or Covenant Defeasance
	  	 	80	 


  
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	 SECTION 1105.
	 	Deposited Money and Government Securities to Be Held in Trust; Other Miscellaneous Provisions	  	 	81	 
	 SECTION 1106.
	 	 Reinstatement
	  	 	82	 
	
	ARTICLE TWELVE	  

	
	GUARANTEES AND OFFERING PROCEEDS NOTE GUARANTEES	  

			
	 SECTION 1201.
	 	 Guarantees
	  	 	82	 
	 SECTION 1202.
	 	 Contribution
	  	 	84	 
	 SECTION 1203.
	 	 Release of Guarantees
	  	 	84	 
	 SECTION 1204.
	 	 Successors and Assigns
	  	 	85	 
	 SECTION 1205.
	 	 No Waiver
	  	 	85	 
	 SECTION 1206.
	 	 Modification
	  	 	85	 
	 SECTION 1207.
	 	 Execution of Supplemental Indenture for Future Guarantors
	  	 	85	 
	 SECTION 1208.
	 	 Subordination of Note Guarantees
	  	 	85	 
	 SECTION 1209.
	 	Execution of Offering Proceeds Note Guarantees for Future Offering Proceeds Note Guarantors; Subordination of Offering Proceeds Note Guarantee	  	 	86	 
	
	 APPENDIX A – Provisions Relating to Securities
	  

	 EXHIBIT 1 TO APPENDIX A – Form of Security
	  

	 EXHIBIT A – Form of Incumbency Certificate
	  

	 EXHIBIT B – Form of Supplemental Indenture (Future Guarantors)
	  

	 EXHIBIT C – Form of Parent Intercompany Note Subordination Agreement
	  

	 EXHIBIT D – Form of Offering Proceeds Note Guarantee
	  

	 EXHIBIT E – Form of Supplemental Indenture (Subordination of Note
Guarantees)
	  

	 EXHIBIT F – Form of Offering Proceeds Note
	  


  

  
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 INDENTURE, dated as of January 13, 2021, among Level 3 Parent, LLC, a limited liability
company duly organized and existing under the laws of the State of Delaware (herein called “Level 3 Parent”), having its principal office at 1025 Eldorado Boulevard, Broomfield, CO 80021, Level 3 Financing,
Inc., a corporation duly organized and existing under the laws of the State of Delaware (herein called the “Issuer”), having its principal office at 1025 Eldorado Boulevard, Broomfield, CO 80021, and The Bank of New York Mellon
Trust Company, N.A., a national banking association, as trustee (herein called the “Trustee”). 
 RECITALS OF THE ISSUER

 The Issuer has duly authorized the creation of an issue of 3.750% Sustainability-Linked Senior Notes Due 2029 (the
“Securities”), of substantially the tenor and amount hereinafter set forth, and to provide therefor the Issuer and Level 3 Parent have duly authorized the execution and delivery of this Indenture. 

All things necessary have been done to make the Securities, when executed by the Issuer and authenticated and delivered hereunder and duly
issued by the Issuer, the valid and legally binding obligations of the Issuer and to make this Indenture a valid and legally binding agreement of each of Level 3 Parent, the Issuer and the Trustee, in accordance with their and its terms. 

Simultaneously with the closing of the offering of the Securities, the Issuer will lend the net proceeds of the issuance of the Securities and
certain cash on hand to Level 3 LLC in return for the Offering Proceeds Note. Currently, Level 3 LLC is the obligor on the Parent Intercompany Note. Pursuant to the Parent Intercompany Note Subordination Agreement, Level 3 LLC’s
obligations under the Parent Intercompany Note will be subordinated to its obligations under the Offering Proceeds Note upon the limited circumstances set forth therein. As and to the extent set forth herein, under certain circumstances, Restricted
Subsidiaries may be required to enter into a Note Guarantee and an Offering Proceeds Note Guarantee and subordinate certain intercompany obligations to their obligations under such guarantees pursuant to the Parent Intercompany Note Subordination
Agreement. Pursuant to the Omnibus Offering Proceeds Note Subordination Agreement, Level 3 LLC’s obligations under the Offering Proceeds Note will be subordinated to its obligations under the Loan Proceeds Note issued by Level 3 LLC
to the Issuer in connection with the Existing Credit Facility and the Existing Secured Notes upon the limited circumstances set forth therein. 

NOW, THEREFORE, THIS INDENTURE WITNESSETH: 

For and in consideration of the premises and the purchase of the Securities by the Holders thereof, it is mutually covenanted and agreed, for
the equal and proportionate benefit of all Holders of the Securities, as follows: 







 ARTICLE ONE 

DEFINITIONS AND OTHER PROVISIONS 

OF GENERAL APPLICATION 
 SECTION
101.    Definitions. 
 For all purposes of this Indenture, including the recitals set forth above, except as
otherwise expressly provided or unless the context otherwise requires: 
 (a)    the terms defined in
this Article have the meanings assigned to them in this Article, and include the plural as well as the singular; 

(b)    all accounting terms not otherwise defined herein have the meanings assigned to them in accordance
with generally accepted accounting principles, and, except as otherwise herein expressly provided, the term “generally accepted accounting principles” with respect to any computation required or permitted hereunder shall mean United
States generally accepted accounting principles as in effect on the date of this Indenture; 
 (c)    the
words “herein”, “hereof” and “hereunder” and other words of similar import refer to this Indenture as a whole and not to any particular Article, Section, paragraph or other subdivision; 

(d)    unless otherwise indicated, references to Articles, Sections, paragraphs or other subdivisions are
references to such Articles, Sections, paragraphs or other subdivisions of this Indenture; and 

(e)    “or” is not exclusive and “including” means including without
limitation. 
 “3.400% Senior Secured Notes due 2027” means the Issuer’s 3.400% Senior Secured Notes due 2027 issued
pursuant to the Indenture dated as of November 29, 2019, among the Issuer, Level 3 Parent, and The Bank of New York Mellon Trust Company, N.A., as trustee. 

“3.625% Proceeds Note” means the intercompany note issued by Level 3 LLC to the Issuer in respect of the proceeds
of the offering of the 3.625% Senior Notes due 2029. 
 “3.625% Senior Notes due 2029” means the Issuer’s 3.625%
Senior Notes due 2029 issued pursuant to the Indenture dated as of August 12, 2020, among the Issuer, Level 3 Parent and The Bank of New York Mellon Trust Company, N.A., as trustee. 

“3.875% Senior Secured Notes due 2029” means the Issuer’s 3.875% Senior Secured Notes due 2029 issued pursuant to the
Indenture dated as of November 29, 2019, among the Issuer, Level 3 Parent, and The Bank of New York Mellon Trust Company, N.A., as trustee. 

“4.250% Proceeds Note” means the intercompany note issued by Level 3 LLC to the Issuer in respect of the proceeds
of the offering of the 4.250% Senior Notes due 2028. 

  
 2 








 “4.250% Senior Notes due 2028” means the Issuer’s 4.250% Senior Notes due
2028 issued pursuant to the Indenture dated as of June 15, 2020, among the Issuer, Level 3 Parent and The Bank of New York Mellon Trust Company, N.A., as trustee. 

“4.625% Proceeds Note” means the intercompany note issued by Level 3 LLC to the Issuer in respect of the proceeds
of the offering of the 4.625% Senior Notes due 2027. 
 “4.625% Senior Notes due 2027” means the Issuer’s 4.625%
Senior Notes due 2027 issued pursuant to the Indenture dated as of September 25, 2019, among the Issuer, Level 3 Parent and The Bank of New York Mellon Trust Company, N.A., as trustee. 

“5.25% Proceeds Note” means the intercompany note issued by Level 3 LLC to the Issuer in respect of the proceeds of
the offering of the 5.25% Senior Notes due 2026. 
 “5.25% Senior Notes due 2026” means the Issuer’s 5.25% Senior
Notes due 2026 issued pursuant to the Indenture dated as of March 22, 2016, among the Issuer, Level 3 Parent and The Bank of New York Mellon Trust Company, N.A., as trustee. 

“5.375% due 2024 Proceeds Note” means the intercompany note issued by Level 3 LLC to the Issuer in respect of the
proceeds of the offering of the 5.375% Senior Notes due 2024. 
 “5.375% due 2025 Proceeds Note” means the intercompany
note issued by Level 3 LLC to the Issuer in respect of the proceeds of the offering of the 5.375% Senior Notes due 2025. 

“5.375% Senior Notes due 2024” means the Issuer’s 5.375% Senior Notes due 2024 issued pursuant to the Indenture dated as
of November 13, 2015, among the Issuer, Level 3 Parent and The Bank of New York Mellon Trust Company, N.A., as trustee. 

“5.375% Senior Notes due 2025” means the Issuer’s 5.375% Senior Notes due 2025 issued pursuant to the Indenture dated as
of April 28, 2015, among the Issuer, Level 3 Parent and The Bank of New York Mellon Trust Company, N.A., as trustee. 

“Accreted Value” of any Debt issued at a price less than the principal amount at stated maturity means, as of any date of
determination, an amount equal to the sum of (a) the issue price of such Debt as determined in accordance with Section 1273 of the Code or any successor provisions plus (b) the aggregate of the portions of the original issue discount
(the excess of the amounts considered as part of the “stated redemption price at maturity” of such Debt within the meaning of Section 1273(a)(2) of the Code or any successor provisions, whether denominated as principal or
interest, over the issue price of such Debt) that shall theretofore have accrued pursuant to Section 1272 of the Code (without regard to Section 1272(a)(7) of the Code) from the date of issue of such Debt to the date of determination,
minus all amounts theretofore paid in respect of such Debt, which amounts are considered as part of the “stated redemption price at maturity” of such Debt within the meaning of Section 1273(a)(2) of the Code or any successor
provisions (whether such amounts paid were denominated as principal or interest). 
 “Acquired Debt” means, with respect to
any specified Person, (i) Debt of any other Person existing at the time such Person merges with or into or consolidates with or becomes a Subsidiary of such specified Person and (ii) Debt secured by a Lien encumbering any Property acquired
by such specified Person, which Debt was not incurred in anticipation of, and was outstanding prior to, such merger, consolidation or acquisition. 

  
 3 








 “Act”, when used with respect to any Holder, has the meaning specified in
Section 104. 
 “Additional Refinancing Amount” means, with respect to any refinancing permitted by
Section 908(b)(vi), the amount of any premium required to be paid in connection with such refinancing pursuant to the terms of the Debt so refinanced or the amount of any premium reasonably determined by the Board of Directors of Level 3
Parent or a duly authorized committee thereof as necessary to accomplish such refinancing by means of a tender offer or privately negotiated repurchase, plus the fees and expenses of the Issuer or the relevant Issuer Restricted Subsidiary Incurred
in connection with such refinancing. 
 “Additional Securities” means, subject to the Issuer’s compliance with the
covenants in this Indenture, including Section 908, 3.750% Sustainability-Linked Senior Notes due 2029 issued from time to time after the Issue Date under the terms of this Indenture (other than pursuant to Section 306, 307 or 1008 of this
Indenture). 
 “Affiliate” of any Person means any other Person directly or indirectly controlling or controlled by or
under direct or indirect common control with such Person. For the purposes of this definition, “control” when used with respect to any Person means the power to direct the management and policies of such Person, directly or
indirectly, whether through the ownership of voting securities, by contract or otherwise; and the terms “controlling” and “controlled” have meanings correlative to the foregoing. 

“Agent Members” has the meaning specified in Section 2.1(b) of Appendix A. 

“Assurance Letter” means a letter delivered to the Issuer from the External Verifier confirming that the data provided by
Lumen to the External Verifier has been verified. 
 “Attributable Value” means, as to any Sale and Leaseback Transaction
resulting in a Finance Lease Obligation, the principal amount of such Finance Lease Obligation. 
 “Board of Directors” of
any Person means the board of directors or comparable body of such Person. 
 “Board Resolution” of any Person means a copy
of a resolution certified by the Secretary or an Assistant Secretary of such Person to have been duly adopted by the Board of Directors and to be in full force and effect on the date of such certification, and delivered to the Trustee. 

“Business Day” means each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in
the City of New York are authorized or obligated by law or executive order to close. 
 “Capital Stock” of any Person
means any and all shares, interests, participations or other equivalents (however designated) of corporate stock or other equity participations, including partnership interests, whether general or limited, of such Person and any rights (other than
debt securities convertible or exchangeable into an equity interest), warrants or options to acquire an equity interest in such Person. 

  
 4 








 “Cash Equivalents” means (i) U.S. dollars or foreign currencies held from
time to time in the ordinary course of business; (ii) Government Securities having maturities of not more than one year from the date of acquisition; (iii) marketable general obligations issued by any state of the United States of America
or any political subdivision of any such state or any public instrumentality thereof maturing within one year from the date of acquisition and, at the time of acquisition, having a long-term credit rating of “A” or better from S&P or
“A2” or better from Moody’s or a short-term credit rating of “A-2” or better from S&P or “P-2” or better from Moody’s;
(iv) certificates of deposit, demand deposits, time deposits, eurodollar time deposits, overnight bank deposits or bankers’ acceptances having maturities of not more than one year from the date of acquisition thereof issued by any
commercial bank the long-term debt of which is rated at the time of acquisition thereof at least “A” or the equivalent thereof by S&P or “A2” or the equivalent thereof by Moody’s or any commercial bank ranking within the
top ten of all commercial banks in such bank’s country of operation on the basis of consolidated assets, and, in each case, having consolidated assets with value in excess of $500 million; (v) repurchase obligations with a term of not
more than seven days for underlying securities of the types described in clauses (ii), (iii) and (iv) above entered into with any bank meeting the qualifications specified in clause (iv) above; (vi) commercial paper rated at the time of
acquisition thereof at least “A” (long-term) or “A-2” (short-term) or the respective equivalent thereof by S&P or “A2” (long-term) or
“P-2” (short-term) or the respective equivalent thereof by Moody’s or, if S&P and Moody’s cease publishing ratings of investments, carrying an equivalent rating by a nationally
recognized rating agency (other than Moody’s and S&P) that rates debt securities having a maturity at original issuance of at least one year and in any case maturing within one year after the date of acquisition thereof; and
(vii) interests in any investment company or money market fund which invests 95% or more of its assets in instruments of the type specified in clauses (i) through (vi) above. 

“Cash Management Agreement” means any agreement to provide to the Issuer or any Issuer Restricted Subsidiary cash management
services for collections, treasury management services (including controlled disbursement, overdraft, automated clearing house fund transfer services, return items and interstate depository network services), any demand deposit, payroll, trust or
operating account relationships, commercial credit cards, merchant card, purchase or debit cards, non-card e-payables services, and other cash management services,
including electronic funds transfer services, lockbox services, stop payment services and wire transfer services. 
 “Change of
Control” has the meaning specified in Section 907. 
 “Change of Control Triggering Event” has the meaning
specified in Section 907. 
 “Climate Change Questionnaire” means the completed climate change questionnaire
most-recently submitted by Lumen to the Carbon Disclosure Project and available at www.cdp.net. 
 “Code” means the U.S.
Internal Revenue Code of 1986, as amended. 
 “Commission” means the Securities and Exchange Commission, as from time to
time constituted, created under the Exchange Act, or, if at any time after the execution of this Indenture such Commission is not existing and performing the duties now assigned to it under the Trust Indenture Act, then the body performing such
duties at such time. 
 “Common Stock” of any Person means Capital Stock of such Person that does not rank prior, as to the
payment of dividends or as to the distribution of assets upon any voluntary or involuntary liquidation, dissolution or winding up of such Person, to shares of Capital Stock of any other class of such Person. 

  
 5 








 “Consolidated Cash Flow Available for Fixed Charges” for the Issuer and the
Issuer Restricted Subsidiaries for any period means the Consolidated Net Income of the Issuer and the Issuer Restricted Subsidiaries for such period increased by the sum of, to the extent reducing such Consolidated Net Income for such period
(or, with respect to clause (v) below, reduced by such amount to the extent increasing such Consolidated Net Income for such period), (i) Consolidated Interest Expense of the Issuer and the Issuer Restricted Subsidiaries for such
period; (ii) Consolidated Income Tax Expense of the Issuer and the Issuer Restricted Subsidiaries for such period; (iii) consolidated depreciation and amortization expense and any other non-cash
items (other than any such non-cash item to the extent that it represents an accrual of or reserve for cash expenditures in any future period) for the Issuer and the Issuer Restricted Subsidiaries;
(iv) other non-recurring or unusual losses or expenses of the Issuer and the Issuer Restricted Subsidiaries (as determined by the Issuer in good faith); (v)
non-recurring or unusual gains of the Issuer and the Issuer Restricted Subsidiaries (as determined by the Issuer in good faith); (vi) acquisition-related costs and
restructuring reserves incurred by the Issuer or any of the Issuer Restricted Subsidiaries in connection with the acquisition of, merger, amalgamation or consolidation with, any Person expensed in computing such Consolidated Net Income to the extent
the same would have been capitalized prior to the adoption of Statement of Financial Accounting Standards No. 141R, Business Combinations; (vii) the amount of (a) any restructuring charges or reserves and expenses related to business
optimization or cost savings initiatives (which, for the avoidance of doubt, shall include, without limitation, the effect of inventory optimization programs, facility closures, facility consolidations, retention, systems establishment costs,
contract termination costs and future lease commitments) of the Issuer and the Issuer Restricted Subsidiaries, and (b) any impairment charge or asset write-off or write-down of the Issuer and the Issuer
Restricted Subsidiaries, in each case, pursuant to generally accepted accounting principles; and (viii) any non-recurring expenses or charges (other than depreciation or amortization expense) related to
any equity offering, investment, acquisition, disposition, recapitalization or the Incurrence of Debt permitted to be Incurred under this Indenture (including a refinancing thereof) (whether or not successful), including (a) such fees, expenses
or charges related to the offering of the Securities (including breakage costs in connection with hedging obligations) and (b) any amendment or other modification of the Securities, and, in each case, deducted (and not added back) in computing
Consolidated Net Income; provided, however, that there shall be excluded therefrom the Consolidated Cash Flow Available for Fixed Charges (if positive) of any Issuer Restricted Subsidiary (calculated separately for such Issuer
Restricted Subsidiary in the same manner as provided above for the Issuer), that is subject to a restriction which prevents the payment of dividends or the making of distributions to the Issuer or another Issuer Restricted Subsidiary, as applicable,
to the extent of such restrictions. 
 “Consolidated Income Tax Expense” for the Issuer and the Issuer Restricted
Subsidiaries for any period means the aggregate amounts of the provisions for income taxes of the Issuer and the Issuer Restricted Subsidiaries for such period calculated on a consolidated basis in accordance with generally accepted accounting
principles. 
 “Consolidated Interest Expense” for the Issuer and the Issuer Restricted Subsidiaries for any period means
the interest expense included in a consolidated income statement (excluding interest income) of the Issuer and the Issuer Restricted Subsidiaries for such period in accordance with generally accepted accounting principles, including, without
limitation or duplication (or, to the extent not so included, with the addition of), (i) the amortization of Debt discounts and issuance costs, including commitment fees; 

  
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(ii) any payments or fees with respect to letters of credit, bankers’ acceptances or similar facilities; (iii) net costs with respect to interest rate swap or similar agreements or
foreign currency hedge, exchange or similar agreements (including fees); (iv) Preferred Stock Dividends (other than dividends paid in shares of Preferred Stock that is not Disqualified Stock) declared and paid or payable; (v) accrued
Disqualified Stock Dividends, declared and paid or payable; (vi) interest on Debt guaranteed by the Issuer and the Issuer Restricted Subsidiaries; (vii) the portion of any Finance Lease Obligation or Sale and Leaseback Transaction paid
during such period that is allocable to interest expense; (viii) interest Incurred in connection with investments in discontinued operations; and (ix) the cash contributions to any employee stock ownership plan or similar trust to the
extent such contributions are used by such plan or trust to pay interest or fees to any Person (other than the Issuer or an Issuer Restricted Subsidiary) in connection with Debt Incurred by such plan or trust. 

“Consolidated Net Income” for the Issuer and the Issuer Restricted Subsidiaries for any period means the net income (or loss)
of the Issuer and the Issuer Restricted Subsidiaries, as applicable, for such period determined on a consolidated basis in accordance with generally accepted accounting principles; provided, however, that there shall be excluded
therefrom (a) the net income (or loss) of any Person that is not an Issuer Restricted Subsidiary, as applicable, except to the extent of the amount of dividends or other distributions actually paid to the Issuer or an Issuer Restricted
Subsidiary, as applicable, by such Person during such period; (b) gains or losses realized upon the sale or other disposition of any Property of the Issuer or the Issuer Restricted Subsidiaries that is not sold or disposed of in the ordinary
course of business (it being understood that Permitted Telecommunications Capital Asset Dispositions shall be considered to be in the ordinary course of business); (c) gains or losses realized upon the sale or other disposition of any Special
Assets; (d) all extraordinary gains and extraordinary losses, determined in accordance with generally accepted accounting principles; (e) the cumulative effect of changes in accounting principles;
(f) non-cash gains or losses resulting from fluctuations in currency exchange rates; (g) any non-cash expense related to the issuance to employees or directors
of the Issuer or any Issuer Restricted Subsidiary of (1) options to purchase Capital Stock of the Issuer or such Issuer Restricted Subsidiary or (2) other compensatory rights; provided, in either case, that such options or rights,
by their terms can be redeemed at the option of the holder of such option or right only for Capital Stock; (h) with respect to an Issuer Restricted Subsidiary that is not a Wholly Owned Subsidiary, any aggregate net income (or loss) in excess
of the Issuer’s or any Issuer Restricted Subsidiary’s pro rata share of the net income (or loss) of such Issuer Restricted Subsidiary that is not a Wholly Owned Subsidiary; (i) for purposes of calculating Pro Forma Consolidated Cash
Flow Available for Fixed Charges in paragraphs (a) and (b) of Section 908 only, ordinary losses or gains (including related fees and expenses) on early extinguishment of Debt; (j) income or loss attributable to discontinued operations
(including, without limitation, operations disposed of during such period whether or not such operations were classified as discontinued); (k) the amount of any expense to the extent a corresponding amount is received in cash by the Issuer or such
Issuer Restricted Subsidiary; provided that such payment has not been otherwise included in Consolidated Net Income; and (l) to the extent covered by insurance and actually reimbursed or, so long as the Issuer has made a determination
that there exists reasonable evidence that such amount will in fact be reimbursed by the insurer and only to the extent that such amount is in fact reimbursed within 540 days of the date of such determination (with a deduction for any amount so
added back to the extent not so reimbursed within 540 days), expenses with respect to liability or casualty events or business interruption; provided further that there shall further be excluded therefrom the net income (but not net
loss) of any Issuer Restricted Subsidiary, as applicable, that is subject to a restriction which prevents the payment of dividends or the making of distributions to the Issuer or another Issuer Restricted Subsidiary, as applicable, to the extent of
such restriction. 

  
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 “Consolidated Tangible Assets” of any Person means the total amount of assets
(less applicable reserves and other properly deductible items) which under generally accepted accounting principles would be included on a consolidated balance sheet of such Person and its Subsidiaries after deducting therefrom all goodwill, trade
names, trademarks, patents, unamortized debt discount and expense and other like intangibles, which in each case under generally accepted accounting principles would be included on such consolidated balance sheet. 

“Corporate Trust Office” means the principal corporate trust office of the Trustee, at which at any particular time its
corporate trust business shall be administered, which office at the date of execution of this Indenture is located at 400 South Hope St., Suite 500, Los Angeles, CA 90071, except that, with respect to presentation of Securities for payment or for
registration of transfer or exchange, such term shall mean the office or agency of the Trustee at which, at any particular time, its corporate agency business shall be conducted. 

“Credit Facilities” means one or more credit agreements, including the Existing Credit Facility, loan agreements or similar
facilities, secured or unsecured, providing for revolving credit loans, term loans and/or letters of credit, including any Qualified Receivable Facility, entered into from time to time by the Issuer or any Issuer Restricted Subsidiaries, or Purchase
Money Debt, or Debt Incurred pursuant to Finance Lease Obligations, Sale and Leaseback Transactions, or senior secured note issuances, and including any related notes, Guarantees, collateral documents, instruments and agreements executed in
connection therewith, as the same may be amended, supplemented, modified, restated or replaced from time to time. 
 “Debt”
means (without duplication), with respect to any Person, whether recourse is to all or a portion of the assets of such Person and whether or not contingent, (i) every obligation of such Person for money borrowed, (ii) every obligation of
such Person evidenced by bonds, debentures, notes or other similar instruments, including obligations incurred in connection with the acquisition of Property, (iii) every reimbursement obligation of such Person with respect to letters of
credit, bankers’ acceptances or similar facilities issued for the account of such Person, (iv) every obligation of such Person issued or assumed as the deferred purchase price of Property or services (including securities repurchase
agreements but excluding trade accounts payable or accrued liabilities arising in the ordinary course of business), (v) every Finance Lease Obligation of such Person, including all Attributable Value in respect of Sale and Leaseback
Transactions entered into by such Person, (vi) all obligations to redeem or repurchase Disqualified Stock issued by such Person, (vii) the liquidation preference of any Preferred Stock (other than Disqualified Stock, which is covered by
the preceding clause (vi)) issued by any Restricted Subsidiary of such Person, (viii) every obligation under Hedging Agreements of such Person and (ix) every obligation of the type referred to in the preceding clauses (i) through
(viii) of another Person and all dividends of another Person the payment of which, in either case, such Person has Guaranteed. The “amount” or “principal amount” of Debt at any time of determination as used herein
represented by (a) any Debt issued at a price that is less than the principal amount at maturity thereof, shall be, except as otherwise set forth herein, the Accreted Value of such Debt at such time or (b) in the case of any Receivables
sale constituting Debt, the amount of the unrecovered purchase price (that is, the amount paid for Receivables that has not been actually recovered from the collection of such Receivables) paid by the purchaser (other than the Issuer or a Wholly
Owned Restricted Subsidiary of the Issuer) thereof. The amount of Debt represented by an obligation under a Hedging Agreement shall be equal to (x) zero if such obligation has been Incurred pursuant to clause (viii) of paragraph (b)
of Section 908 or (y) the net termination value of such obligation if not Incurred pursuant to such clause. 

  
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 “Default” means any event, act or condition the occurrence of which is, or after
notice or the passage of time or both would be, an Event of Default; provided that any Default that results solely from the taking of an action that would have been permitted but for the continuation of a previous Default will be deemed to be
cured if such previous Default is cured prior to becoming an Event of Default. 
 “Default Direction” means a Noteholder
Direction relating to a notice of Default. 
 “Depository” means The Depository Trust Company, its nominees and successors.

 “Derivative Instrument” with respect to a Person, means any contract, instrument or other right to receive payment or
delivery of cash or other assets to which such Person or any Affiliate of such Person that is acting in concert with such Person in connection with such Person’s investment in the Securities (other than a Screened Affiliate) is a party (whether
or not requiring further performance by such Person), the value and/or cash flows of which (or any material portion thereof) are materially affected by the Performance References. 

“Designation” has the meaning specified in Section 912. 

“Directing Holder” means any one or more Holders providing a Noteholder Direction. 

“Disqualified Stock” of any Person means any Capital Stock of such Person which, by its terms (or by the terms of any
security into which it is convertible or for which it is exchangeable), or upon the happening of any event, matures or is mandatorily redeemable, pursuant to a sinking fund obligation or otherwise, or is redeemable at the option of the holder
thereof, in whole or in part, on or prior to the final Stated Maturity of the Securities; provided, however, that any Preferred Stock which would not constitute Disqualified Stock but for provisions thereof giving holders thereof the
right to require the Issuer to repurchase or redeem such Preferred Stock upon the occurrence of (i) a change of control occurring prior to the final Stated Maturity of the Securities shall not constitute Disqualified Stock if the change of
control provisions applicable to such Preferred Stock provide that the Issuer will not repurchase or redeem any such stock pursuant to such provisions prior to the Issuer’s repurchase of such Securities as are required to be repurchased
pursuant to Section 907 or (ii) an asset sale occurring prior to the final Stated Maturity of the Securities shall not constitute Disqualified Stock. 

“Disqualified Stock Dividends” means all dividends with respect to Disqualified Stock of the Issuer held by Persons other
than a Wholly Owned Restricted Subsidiary. 
 “Domestic Restricted Subsidiary” means any Restricted Subsidiary other than
(a) a Foreign Restricted Subsidiary or (b) a Subsidiary of a Foreign Restricted Subsidiary. 
 “Event of Default”
has the meaning specified in Section 501. 
 “Exchange Act” means the Securities Exchange Act of 1934, as amended (or
any successor act), and the rules and regulations thereunder (or respective successors thereto). 
 “Existing Credit
Facility” means the Credit Agreement dated as of March 13, 2007, among the Issuer, Level 3 Parent, the lenders party thereto and Merrill Lynch Capital Corporation, as Administrative Agent, as amended and restated by the Thirteenth
Amendment Agreement as of November 29, 2019. 

  
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 “Existing Notes” means the Existing Secured Notes and the Existing Unsecured
Notes, referred to collectively. 
 “Existing Proceeds Notes” means the 5.375% due 2024 Proceeds Note, the 5.375% due 2025
Proceeds Note, the 5.25% Proceeds Note, the 4.625% Proceeds Note, the 4.250% Proceeds Note and the 3.625% Proceeds Note, referred to collectively. 

“Existing Secured Notes” means the Issuer’s 3.400% Senior Secured Notes due 2027 and 3.875% Senior Secured Notes due
2029, referred to collectively. 
 “Existing Unsecured Notes” means the Issuer’s (i) 5.375% Senior Notes due 2024 in
an original aggregate principal amount of $900 million, (ii) 5.25% Senior Notes due 2026 in an original aggregate principal amount of $775 million, (iii) 5.375% Senior Notes due 2025 in an original aggregate principal amount of
$800 million, (iv) 4.625% Senior Notes due 2027 in an original aggregate principal amount of $1,000 million, (v) 4.250% Senior Notes due 2028 in an original aggregate principal amount of $1,200 million and (vi) 3.625% Senior Notes due
2029 in an original aggregate principal amount of $840 million, referred to collectively. 
 “Expiration Date” has the
meaning specified in “Offer to Purchase” below. 
 “External Verifier” means Lucideon CICS Limited or any
other qualified provider of third-party assurance or attestation services appointed by Lumen to review Lumen’s tCO2e emissions and provide related assurance services. 

“Fair Market Value” means, with respect to any Property, the price that could be negotiated in an arm’s-length free market transaction, for cash, between a willing seller and a willing buyer, neither of whom is under pressure or compulsion to complete the transaction. Unless otherwise specified herein, Fair
Market Value shall be determined by the Issuer in good faith. 
 “Federal Bankruptcy Code” means the Bankruptcy Act of
Title 11 of the United States Code, as amended from time to time. 
 “Finance Lease Obligation” of any Person means the
obligation to pay rent or other payment amount under a lease of (or other Debt arrangements conveying the right to use) Property of such Person which is required to be classified and accounted for as a finance lease on the face of a balance sheet of
such Person in accordance with generally accepted accounting principles (a “Finance Lease”). The stated maturity of such obligation shall be the date of the last payment of rent or any other amount due under such lease prior to the
first date upon which such lease may be terminated by the lessee without payment of a penalty. The principal amount of such obligation shall be the capitalized amount thereof that would appear on the face of a balance sheet of such Person in
accordance with generally accepted accounting principles; provided that all obligations of any Person that are or would be characterized as operating lease obligations in accordance with generally accepted accounting principles prior to
December 15, 2018 (whether or not such lease obligations were in effect on such date) shall continue to be accounted for as operating lease obligations (and not as Finance Lease Obligations) for purposes of this Indenture regardless of any
change in generally acceptable accounting principles following such date that would otherwise require such obligations to be recharacterized (on a prospective or retroactive basis or otherwise) as Finance Lease Obligations. 

  
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 “Fitch” means Fitch Inc., a subsidiary of Fimalac, S.A. or, if Fitch Inc. shall
cease rating debt securities having a maturity at original issuance of at least one year and such ratings business shall have been transferred to a successor Person, such successor Person. 

“Foreign Restricted Subsidiary” means any Restricted Subsidiary that is not organized under the laws of the United States of
America or any State thereof or the District of Columbia. 
 “Fully-Adjusted Subsequent Interest Rate” means 3.875% per
annum. 
 “GHG Protocol” means (i) “The Greenhouse Gas Protocol: A Corporate Accounting and Reporting Standard –
Revised Edition” issued by the World Resources Institute, as supplemented by (x) the “GHG Protocol – Measuring to Manage: A Guide to Designing GHG Accounting and Reporting Programs,” (y) the “GHG Protocol Scope 2
Guidance – An Amendment to the GHG Protocol Corporate Standard” and (z) any similar guidance issued from time to time by the World Resources Institute or (ii) any future editions of these materials issued by the World Resources
Institute. 
 “Global Security” means a Rule 144A Global Security or a Regulation S Global Security, as the case
may be. 
 “Government Securities” means direct obligations of, or obligations fully and unconditionally guaranteed or
insured by, the United States of America or any agency or instrumentality thereof which are not callable or redeemable at the issuer’s option (unless, for purposes of the definition of “Cash Equivalents” only, the obligations
are redeemable or callable at a price not less than the purchase price paid by the Issuer or the applicable Issuer Restricted Subsidiary, together with all accrued and unpaid interest (if any) on such Government Securities). 

“Governmental Authority” means the government of the United States of America, any other nation or any political subdivision
thereof, whether state or local, and any agency, authority, instrumentality, regulatory body, court, central bank or other entity exercising executive, legislative, judicial, taxing, regulatory or administrative powers or functions of or pertaining
to government. 
 “Guarantee” by any Person means any obligation, direct or indirect, contingent or otherwise, of such
Person guaranteeing, or having the economic effect of guaranteeing, any Debt of any other Person (the “primary obligor”) in any manner, whether directly or indirectly, and any obligation, direct or indirect, contingent or otherwise,
of such Person (i) to purchase or pay (or advance or supply funds for the purchase or payment of) such Debt or to purchase (or to advance or supply funds for the purchase of) any security for the payment of such Debt, including any such
obligations arising by virtue of partnership arrangements or by agreements to keep-well, (ii) to purchase Property or services or to take-or-pay for the purpose of
assuring the holder of such Debt of the payment of such Debt, (iii) to maintain working capital, equity capital or other financial statement condition or liquidity of the primary obligor so as to enable the primary obligor to pay such Debt or
(iv) entered into for the purpose of assuring in any other manner the obligee against loss in respect thereof, in whole or in part (and “Guaranteed”, “Guaranteeing” and “Guarantor” shall have
meanings correlative to the foregoing); provided, however, that the Guarantee by any Person shall not include endorsements by such Person for collection or deposit, in either case, in the ordinary course of business. 

“Guarantor” means (1) Level 3 Parent and (2) any other Issuer Restricted Subsidiary that becomes a Guarantor
pursuant to Section 908, Section 913, Article Seven or any other provision of this Indenture, 

  
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other than any such Issuer Restricted Subsidiary whose Guarantee has been released in accordance with this Indenture; provided that such Issuer Restricted Subsidiary is not otherwise
required to become a Guarantor under this Indenture. 
 “Hedging Agreement” of any Person means any forward contract,
futures contract, swap, option, other financial agreement or arrangement (including caps, floors, collars and similar agreements) relating to, or the value of which is dependent upon, interest rates, currency exchange rates, commodities or indices
or other expenses of the Issuer and the Issuer Restricted Subsidiaries. 
 “Holder” means a Person in whose name a Security
is registered in the Security Register. 
 “Incur” means, with respect to any Debt or other obligation of any Person, to
create, issue, incur (by conversion, exchange or otherwise), assume, Guarantee or otherwise become liable in respect of such Debt or other obligation including the recording, as required pursuant to generally accepted accounting principles or
otherwise, of any such Debt or other obligation on the balance sheet of such Person (and “Incurrence”, “Incurred” and “Incurring” shall have meanings correlative to the foregoing); provided,
however, that a change in generally accepted accounting principles that results in an obligation of such Person that exists at such time becoming Debt shall not be deemed an Incurrence of such Debt and that neither the accrual of interest nor
the accretion of original issue discount shall be deemed an Incurrence of Debt. Debt otherwise incurred by a Person before it becomes a Subsidiary of the Issuer shall be deemed to have been Incurred at the time at which it became a Subsidiary. 

“Indenture” means this instrument as originally executed and as it may from time to time be supplemented or amended by one or
more indentures supplemental hereto entered into pursuant to the applicable provisions hereof. 
 “Initial Purchasers”
means Morgan Stanley & Co. LLC, BofA Securities, Inc., Citigroup Global Markets Inc., Barclays Capital Inc., Credit Suisse Securities (USA) LLC, Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC, RBC Capital Markets, LLC, Wells
Fargo Securities, LLC, Fifth Third Securities, Inc., Mizuho Securities USA LLC, TD Securities (USA) LLC, Truist Securities, Inc., Citizens Capital Markets, Inc., MUFG Securities Americas Inc., Regions Securities LLC and Deutsche Bank Securities
Inc.. 
 “Interest Payment Date” means the Stated Maturity of an installment of interest on the Securities. 

“Interest Rate Step Up Date” means July 16, 2026. 

“Investment Grade Rating” means a rating equal to or higher than (a) in the case of Moody’s, Baa3 (or the
equivalent), (b) in the case of S&P, BBB- (or the equivalent), (c) in the case of Fitch, BBB- (or the equivalent) and (d) in the case of any other Rating
Agency, the equivalent rating by such Rating Agency to the ratings described in clauses (a), (b) and (c). 
 “Issue Date”
means January 13, 2021. 
 “Issue Date Purchase Money Debt” means Purchase Money Debt outstanding on the Issue Date;
provided, however, that the amount of such Purchase Money Debt when Incurred did not exceed 100% of the cost of the construction, installation, acquisition, lease, development or improvement of the applicable Telecommunications/IS
Assets. 

  
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 “Issue Date Rating” means the respective ratings assigned to the Securities by
the Rating Agencies on the Issue Date. 
 “Issuer” means the Person named as “Issuer” in the first
paragraph of this Indenture, until a successor Person shall have become such pursuant to the applicable provisions of this Indenture, and thereafter “Issuer” shall mean such successor Person. 

“Issuer Debt Ratio” means the ratio of (a) the aggregate consolidated principal amount (or, in the case of Debt issued
at a discount, the then-Accreted Value) of Debt of the Issuer and the Issuer Restricted Subsidiaries (other than Debt owed to Level 3 Parent that is subordinated to the Offering Proceeds Note (if Level 3 LLC is the obligor on such
Debt) or to an Offering Proceeds Note Guarantee of the obligor on such Debt), on a consolidated basis, outstanding as of the most recent available quarterly or annual balance sheet, after giving pro forma effect to the proposed Incurrence of Debt
giving rise to such calculation and any other Debt Incurred or repaid since such balance sheet date and the receipt and application of the net proceeds thereof, to (b) Consolidated Cash Flow Available for Fixed Charges of the Issuer and the
Issuer Restricted Subsidiaries for the four full fiscal quarters immediately preceding such proposed Incurrence of Debt for which the consolidated financial statements required to be delivered under Section 905 are available; provided,
however, that if (A) since the beginning of such four full fiscal quarter period the Issuer or any Issuer Restricted Subsidiary shall have made one or more asset dispositions or an investment (by merger or otherwise) in any Issuer
Restricted Subsidiary (or any Person which becomes an Issuer Restricted Subsidiary) or an acquisition, merger or consolidation of Property or (B) since the beginning of such period any Person (that subsequently became an Issuer Restricted
Subsidiary or was merged with or into the Issuer or any Issuer Restricted Subsidiary since the beginning of such period) shall have made such an asset disposition, investment, acquisition, merger or consolidation, then Consolidated Cash Flow
Available for Fixed Charges for such four full fiscal quarter period shall be calculated after giving pro forma effect to such asset dispositions, investments, acquisitions, mergers or consolidations as if such asset dispositions, investments,
acquisitions, mergers or consolidations occurred on the first day of such period. For purposes of this definition, Consolidated Cash Flow Available for Fixed Charges shall include the amount of
“run-rate” cost savings, operating expense reductions, other operating improvements and synergies projected by the Issuer in good faith to result from (x) the consummation of such asset
disposition, investment, acquisition, merger or consolidation and (y) any business optimization or cost savings initiatives (which, for the avoidance of doubt, shall include, without limitation, the effect of inventory optimization programs,
facility closures, facility consolidations, retention, systems establishment costs, contract termination costs and future lease commitments) that have been undertaken or with respect to which substantial steps have been undertaken or are reasonably
expected by the Issuer in good faith to be taken within twenty-four months of the date of the relevant calculation (calculated on a pro forma basis as though such cost savings, operating expense reductions, other operating improvements and synergies
had been realized on the first day of such period), net of the amount of actual benefits realized prior to or during such period from such actions; provided that (i) such cost savings, operating expense reductions, other operating
improvements or cost synergies are reasonably identifiable, reasonably attributable to the actions specified and reasonably anticipated to result from such actions and (ii) such adjustments are set forth in an Officers’ Certificate which
states (a) the amount of such adjustment or adjustments and (b) that such adjustment or adjustments are based on the reasonable good faith beliefs of the officers executing such Officers’ Certificate. 

“Issuer Order” or “Issuer Request” means a written request or order signed in the name of the Issuer by the
Chairman of the Board of Directors, a Vice Chairman of the Board of Directors, the President 

  
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or a Vice President, and by the Chief Financial Officer, the Chief Accounting Officer, the Treasurer, an Assistant Treasurer, the Controller, the Secretary or an Assistant Secretary of the
Issuer, and delivered to the Trustee. 
 “Issuer Restricted Subsidiaries” means the Subsidiaries of the Issuer that are
Restricted Subsidiaries. 
 “Joint Venture” means a Person in which the Issuer or an Issuer Restricted Subsidiary holds not
more than 50% of the shares of Voting Stock. 
 “LCT Election” has the meaning specified in Section 123. 

“LCT Test Date” has the meaning specified in Section 123. 

“Level 3 LLC” means Level 3 Communications, LLC, a Delaware limited liability company and a direct
Wholly Owned Subsidiary of the Issuer. 
 “Level 3 Parent” means the Person named as
“Level 3 Parent” in the first paragraph of this Indenture, until a successor Person shall have become such pursuant to the applicable provisions of this Indenture, and thereafter
“Level 3 Parent” shall mean such successor Person. 
 “Level 3 Parent
Guarantee” means the Note Guarantee of Level 3 Parent. 
 “Lien” means, with respect to any Property, any
mortgage or deed of trust, pledge, hypothecation, assignment, deposit arrangement, security interest, lien, charge, easement (other than any easement not materially impairing usefulness), encumbrance, preference, priority or other security agreement
or preferential arrangement of any kind or nature whatsoever on or with respect to such Property (including any Finance Lease Obligation, conditional sale or other title retention agreement having substantially the same economic effect as any of the
foregoing and any Sale and Leaseback Transaction). For purposes of this definition the sale, lease, conveyance or other transfer by the Issuer or any of the Issuer Restricted Subsidiaries of, including the grant of indefeasible rights of use or
equivalent arrangements with respect to, dark or lit communications fiber capacity or communications conduit shall not constitute a Lien. For the sake of clarity, subordination and setoff rights do not constitute Liens. 

“Limited Condition Transaction” means the consummation of any transaction in connection with any acquisition or similar
investment (including the assumption or incurrence of Debt), in each case whose consummation is not conditioned on the availability of, or on obtaining, third-party financing. 

“Loan Proceeds Note” means the amended and restated intercompany demand note dated March 13, 2007 and as further amended
and restated on November 29, 2019, in an initial principal amount of $1,400,000,000 and subsequently increased to $4,610,500,000, issued by Level 3 LLC to the Issuer to evidence the loans in such aggregate amount made by the Issuer to
Level 3 LLC with the proceeds of the loans under the Existing Credit Facility and the Existing Secured Notes, as it may be further amended from time to time. 

“Long Derivative Instrument” means a Derivative Instrument (i) the value of which generally increases, and/or the
payment or delivery obligations under which generally decrease, with positive changes to the Performance References and/or (ii) the value of which generally decreases, and/or the payment or delivery obligations under which generally increase,
with negative changes to the Performance References. 

  
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 “Lumen Credit Group” means Lumen Technologies, together with each of its
Subsidiaries (but excluding Level 3 Parent and Level 3 Parent’s Subsidiaries). 
 “Lumen Technologies” or
“Lumen” means CenturyLink, Inc., a Louisiana corporation, and any successor thereto. 
 “Material
Transaction” means any acquisition, investment or divestiture involving aggregate consideration in excess of $1,000,000,000. 

“Maturity”, when used with respect to any Security, means the date on which the principal of such Security or an installment
of principal becomes due and payable as therein or herein provided, whether at the Stated Maturity or by declaration of acceleration, notice of redemption or otherwise. 

“Maturity Limitation Excluded Amount” means, in the case of any refinancing Debt, an aggregate amount not to exceed the
greater of (a) $300,000,000 and (b) 0.5 times Pro Forma Consolidated Cash Flow Available for Fixed Charges of the Issuer and the Issuer Restricted Subsidiaries for the four full fiscal quarters immediately preceding the Incurrence of such Debt for
which the consolidated financial statements required to be delivered under Section 905 are available. 
 “Measurement
Date” means April 28, 1998. 
 “Moody’s” means Moody’s Investors Service, Inc. or, if Moody’s
Investors Service, Inc. shall cease rating debt securities having a maturity at original issuance of at least one year and such ratings business shall have been transferred to a successor Person, such successor Person. 

“Net Short” means with respect to a Holder or beneficial owner, as of a date of determination by the Issuer, either
(i) the value of its Short Derivative Instruments exceeds the sum of the (x) the value of its Securities plus (y) the value of its Long Derivative Instruments as of such date of determination or (ii) it is reasonably expected
that such would have been the case were a Failure to Pay or Bankruptcy Credit Event (each as defined in the 2014 ISDA Credit Derivatives Definitions) to have occurred with respect to Lumen Technologies or any Guarantor immediately prior to such date
of determination. 
 “Non-Telecommunications Subsidiary” means any Issuer
Restricted Subsidiary not engaged in any material respect in the Telecommunications/IS Business. 
 “Note Guarantee” means
an unconditional Guarantee of the due and punctual payment of the principal of and premium, if any, and interest on the Securities, when and as due, whether at maturity, by acceleration, upon one or more dates set for prepayment or otherwise, and
all other monetary obligations of the Issuer under this Indenture and the Securities, and the due and punctual performance of all covenants, agreements, obligations and liabilities of the Issuer under or pursuant to this Indenture and the
Securities, including the Level 3 Parent Guarantee. 
 “Noteholder Direction” means any notice of Default, notice of
acceleration or instruction to the Trustee to provide a notice of Default, notice of acceleration or take any other action pursuant to and in accordance with the provisions of this Indenture. 

  
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 “Notification Deadline” means September 30, 2026. 

“Obligations” has the meaning specified in Section 1201. 

“Offer” has the meaning specified in “Offer to Purchase” below. 

“Offer to Purchase” means a written offer (the “Offer”) sent (i) by the Issuer electronically to each
Holder of Securities at its address appearing in the Security Register on the date of the Offer or (ii) in the case of Securities held through the Depository, to Depository participants via the Depository’s electronic messaging system,
offering, in each case, to purchase up to the principal amount of Securities specified in such Offer at the purchase price specified in such Offer (as determined pursuant to this Indenture). Unless otherwise required by applicable law, the Offer
shall specify an expiration date (the “Expiration Date”) of the Offer to Purchase which shall be, subject to any contrary requirements of applicable law, not less than 30 days or more than 60 days after the date of such
Offer and a settlement date (the “Purchase Date”) for purchase of Securities within five Business Days after the Expiration Date. The Issuer shall notify the Trustee at least five Business Days (or such shorter period as is
acceptable to the Trustee) prior to the delivery (or submission via the Depository’s electronic messaging system, as applicable) of the Offer of the obligation to make an Offer to Purchase, and the Offer shall be delivered (or submitted via the
Depository’s electronic messaging system, as applicable) by the Issuer or, at the Issuer’s request and the provision of such notice information, by the Trustee in the name and at the expense of the Issuer. The Offer shall contain
information concerning the business of Level 3 Parent and its Subsidiaries which the Issuer in good faith believes will enable such Holders to make an informed decision with respect to the Offer to Purchase. The Offer shall contain all
instructions and materials necessary to enable such Holders to tender Securities pursuant to the Offer to Purchase, including a description of any mandated or permitted conditions if the Offer is delivered prior to the date of consummation of a
Change of Control. The Offer shall also state: 
 a. the Section of this Indenture pursuant to which the Offer to Purchase is being
made; 
 b. the Expiration Date and the Purchase Date; 

c. the aggregate principal amount of the Outstanding Securities offered to be purchased by the Issuer pursuant to the Offer to Purchase
(including, if less than 100%, the manner by which such amount has been determined pursuant to the Section hereof requiring the Offer to Purchase) (the “Purchase Amount”); 

d. the purchase price to be paid by the Issuer for each $1,000 aggregate principal amount of Securities accepted for payment (as specified
pursuant to this Indenture) (the “Purchase Price”); 
 e. that the Holder may tender all or any portion of the Securities
registered in the name of such Holder and that any portion of a Security tendered must be tendered in an integral multiple of $1,000 principal amount; 

f. the manner in which Notes are to be surrendered for tender pursuant to the Offer to Purchase, including, if applicable, the place or places
where such Notes shall be delivered and any additional documentation required to be delivered in connection therewith; 

  
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 g. that any Securities not tendered or tendered but not purchased by the Issuer will continue to
accrue interest; 
 h. that on the Purchase Date the Purchase Price will become due and payable upon each Security being accepted for
payment pursuant to the Offer to Purchase and that interest thereon, if any, shall cease to accrue on and after the Purchase Date; 
 i.
that Holders will be entitled to withdraw all or any portion of Securities tendered if the Issuer (or the Paying Agent) receives, not later than the close of business on the Expiration Date, a telegram, telex, facsimile transmission or letter
setting forth the name of the Holder, the principal amount of the Security the Holder tendered, the certificate number of the Security the Holder tendered and a statement that such Holder is withdrawing all or a portion of his tender; 

j. that (i) if Securities in an aggregate principal amount less than or equal to the Purchase Amount are duly tendered and not withdrawn
pursuant to the Offer to Purchase, the Issuer shall purchase all such Securities and (ii) if Securities in an aggregate principal amount in excess of the Purchase Amount are tendered and not withdrawn pursuant to the Offer to Purchase, the
Issuer shall purchase Securities having an aggregate principal amount equal to the Purchase Amount on a pro rata basis, in accordance with applicable depositary procedures (with such adjustments as may be deemed appropriate so that
only Securities in denominations of $1,000 or integral multiples thereof shall be purchased); and 
 k. that in the case of any Holder whose
Security is purchased only in part, the Issuer shall execute, and the Trustee shall authenticate and deliver to the Holder of such Security without service charge, a new Security or Securities, of any authorized denomination as requested by such
Holder, in an aggregate principal amount equal to and in exchange for the unpurchased portion of the Security so tendered. 
 Any Offer to
Purchase shall be governed by and effected in accordance with the Offer for such Offer to Purchase. 
 “Offering
Memorandum” means the final offering memorandum dated January 11, 2021, in connection with the sale of the Original Securities. 

“Offering Proceeds Note” means the intercompany demand note dated the Issue Date, in an initial principal amount equal to
$900,000,000, issued by Level 3 LLC to the Issuer as it may be amended from time to time pursuant to Sections 301 and 913, substantially in the form set forth in Exhibit F hereto. 

“Offering Proceeds Note Guarantee” means an unconditional Guarantee of the due and punctual payment of the principal of and
premium, if any, and interest on the Offering Proceeds Note, when and as due, whether on demand, at maturity, by acceleration, upon one or more dates set for prepayment or otherwise, and all other monetary obligations of Level 3 LLC under the
Offering Proceeds Note, in substantially the form set forth in Exhibit D hereto. 
 “Offering Proceeds Note Guarantor”
means any Issuer Restricted Subsidiary that provides an Offering Proceeds Note Guarantee pursuant to Section 908 or any other provision of this Indenture, other than any such Issuer Restricted Subsidiary whose Offering Proceeds Note Guarantee
has been released in accordance with this Indenture, provided such Issuer Restricted Subsidiary is not otherwise required to become an Offering Proceeds Note Guarantor under this Indenture. No Foreign Restricted Subsidiary shall at any time
constitute an Offering Proceeds Note Guarantor. 

  
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 “Officers’ Certificate” of any Person means a certificate signed by the
Chairman of the Board of Directors of such Person, a Vice Chairman of the Board of Directors of such Person, the President or a Vice President, and by the Chief Financial Officer, the Chief Accounting Officer, the Treasurer, an Assistant Treasurer,
the Controller, the Secretary or an Assistant Secretary of such Person and delivered to the Trustee, which shall comply with this Indenture. 

“Omnibus Offering Proceeds Note Subordination Agreement” means the Amended and Restated Omnibus Offering Proceeds Note
Subordination Agreement, dated as of November 29, 2019, among the Issuer, the Issuer in its capacity as a Subordinated Lender (as defined therein) as obligee of the Offering Proceeds Notes (as defined therein), Level 3 Parent and
Level 3 LLC, as the same may be amended, restated, supplemented or otherwise modified from time to time. 
 “Opinion of
Counsel” means an opinion of counsel of Level 3 Parent or the Issuer, including an employee of Level 3 Parent or the Issuer. 

“Original Securities” has the meaning set forth in Section 301. 

“Outstanding”, when used with respect to Securities, means, as of the date of determination, all Securities theretofore
authenticated and delivered under this Indenture, except: 
 (i)    Securities theretofore cancelled by
the Trustee or delivered to the Trustee for cancellation; 
 (ii)    on and after any maturity or
redemption date, Securities, or portions thereof, for whose payment or redemption money in the necessary amount has been theretofore deposited with the Trustee or any Paying Agent (other than Level 3 Parent or the Issuer) in trust or set aside
and segregated in trust by Level 3 Parent or the Issuer (if Level 3 Parent or the Issuer shall act as its own Paying Agent) for the Holders of such Securities; provided that (a) the Trustee or the Paying Agent, as applicable,
is not prohibited from paying such money to the Holders and (b) if such Securities are to be redeemed, notice of such redemption has been duly given pursuant to this Indenture; 

(iii)    Securities, except to the extent provided in Sections 1102 and 1103, with respect to which the
Issuer has effected defeasance or covenant defeasance as provided in Article Eleven; and 

(iv)    Securities which have been paid pursuant to Section 306 or in exchange for or in lieu of which
other Securities have been authenticated and delivered pursuant to this Indenture, other than any such Securities in respect of which there shall have been presented to the Trustee proof satisfactory to it that such Securities are held by a bona
fide purchaser in whose hands the Securities are valid obligations of the Issuer; 
 provided, however, that in determining whether the
Holders of the requisite principal amount of Outstanding Securities have given any request, demand, authorization, direction, consent, notice or waiver hereunder, Securities owned by the Issuer or any other obligor upon the Securities or any
Affiliate of the Issuer or such other obligor shall be disregarded and deemed not to be Outstanding, except that, in determining whether the Trustee shall be protected in making such calculation or in relying upon any such request, demand,
authorization, direction, notice, consent or waiver, only Securities which any 

  
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Responsible Officer of the Trustee actually knows to be so owned or as to which the Trustee has received written notice shall be so disregarded. Securities so owned which have been pledged in
good faith may be regarded as Outstanding if the pledgee establishes to the satisfaction of the Trustee the pledgee’s right so to act with respect to such Securities and that the pledgee is not the Issuer or any other obligor upon the
Securities or any Affiliate of the Issuer or such other obligor. 
 “Parent Intercompany Note” means the intercompany
demand note dated December 8, 1999, as amended and restated on October 1, 2003, in the principal amount of approximately $41,200,000,000 as of September 30, 2020, issued by Level 3 LLC to Level 3 Parent. 

“Parent Intercompany Note Subordination Agreement” means the Parent Intercompany Note Subordination Agreement dated the Issue
Date, among the Issuer, Level 3 Parent and Level 3 LLC, and the other Issuer Restricted Subsidiaries becoming party thereto as contemplated therein, pursuant to which such Issuer Restricted Subsidiaries shall subordinate obligations owed
to Level 3 Parent to any obligations owed in respect of the Offering Proceeds Note, in substantially the form set forth in Exhibit C hereto. 

“Partially-Adjusted Subsequent Interest Rate” means 3.8125% per annum. 

“Paying Agent” means any Person (including Level 3 Parent or the Issuer acting as Paying Agent) authorized by
Level 3 Parent or the Issuer to pay the principal of (and premium, if any) or interest on any Securities on behalf of the Issuer. 

“Performance References” means the value and/or performance of the Securities and/or the creditworthiness of the Issuer
and/or any one or more of the Guarantors. 
 “Permitted Hedging Agreement” of any Person means any Hedging Agreement
entered into with one or more financial institutions in the ordinary course of business, not for purposes of speculation, that is designed to protect such Person against fluctuations in interest rates, currency exchange rates, commodities prices or
other expenses of the Issuer and the Issuer Restricted Subsidiaries. 
 “Permitted Holders” means the members of
Level 3 Parent’s Board of Directors on the Measurement Date and their respective estates, spouses, ancestors, and lineal descendants, the legal representatives of any of the foregoing and the trustees of any bona fide trusts of which the
foregoing are the sole beneficiaries or the grantors, or any Person of which the foregoing “beneficially owns” (as defined in Rule 13d-3 under the Exchange Act) at least 50% of the total
voting power of the Voting Stock of such Person. 
 “Permitted Liens” means (a) Liens for taxes, assessments,
governmental charges, levies or claims which are not yet delinquent or which are being contested in good faith by appropriate proceedings, if a reserve or other appropriate provision, if any, as shall be required in conformity with generally
accepted accounting principles shall have been made therefor; (b) other Liens incidental to the conduct of the Issuer’s and the Issuer Restricted Subsidiaries’ businesses or the ownership of its Property not securing any Debt, and
which do not in the aggregate materially detract from the value of the Issuer’s and the Issuer Restricted Subsidiaries’ Property when taken as a whole, or materially impair the use thereof in the operation of its business; (c) Liens,
pledges and deposits made in the ordinary course of business in connection with workers’ compensation, unemployment insurance and other types of statutory or other obligations; (d) Liens, pledges or deposits made to secure the performance
of tenders, bids, leases, public or statutory obligations, sureties, stays, appeals, indemnities, performance or other similar bonds and other 

  
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obligations of like nature incurred in the ordinary course of business (exclusive of obligations for the payment of borrowed money, the obtaining of advances or credit or the payment of the
deferred purchase price of Property and which do not in the aggregate materially impair the use of Property in the operation of the business of the Issuer and the Issuer Restricted Subsidiaries taken as a whole); (e) zoning restrictions,
servitudes, easements, rights-of-way, restrictions and other similar charges or encumbrances incurred in the ordinary course of business which, in the aggregate, do not
materially detract from the value of the Property subject thereto or materially interfere with the ordinary conduct of the business of the Issuer and the Issuer Restricted Subsidiaries; and (f) any interest or title of a lessor in the Property
subject to any lease other than a Finance Lease. 
 “Permitted Telecommunications Capital Asset Disposition” means the
transfer, conveyance, sale, lease or other disposition of optical fiber and/or conduit and any related equipment used in a Segment (as defined below) of Level 3 Parent’s communications network that (i) constitute capital assets in
accordance with generally accepted accounting principles and (ii) after giving effect to such disposition, would result in Level 3 Parent retaining at least either (A) 24 optical fibers per route mile on such Segment as deployed at
the time of such disposition or (B) 12 optical fibers and one empty conduit per route mile on such Segment as deployed at such time. “Segment” means (x) with respect to Level 3 Parent’s intercity network, the
through-portion of such network between two local networks (i.e., Omaha to Denver) and (y) with respect to a local network of Level 3 Parent (i.e., Dallas), the entire through-portion of such network, excluding the spurs which branch off
the through-portion. 
 “Person” means any individual, corporation, company, partnership, joint venture, limited liability
company, association, joint stock company, trust, unincorporated organization, government or agency or political subdivision thereof or any other entity. 

“Position Representation” means a written representation from each Directing Holder to the Issuer and the Trustee that such
Holder is not (or, in the case such Holder is DTC or its nominee, that such Holder is being instructed solely by beneficial owners that are not) Net Short. 

“Predecessor Security” of any particular Security means every previous Security evidencing all or a portion of the same debt
as that evidenced by such particular Security; and, for the purposes of this definition, any Security authenticated and delivered under Section 306 in exchange for a mutilated security or in lieu of a lost, destroyed or stolen Security shall be
deemed to evidence the same debt as the mutilated, lost, destroyed or stolen Security. 
 “Preferred Stock” of any Person
means Capital Stock of such Person of any class or classes (however designated) that ranks prior, as to the payment of dividends or as to the distribution of assets upon any voluntary or involuntary liquidation, dissolution or winding-up of such Person, to shares of Capital Stock of any other class of such Person. 

“Preferred Stock Dividends” means all dividends with respect to Preferred Stock of Restricted Subsidiaries held by Persons
other than the Issuer or a Wholly Owned Restricted Subsidiary of the Issuer, respectively. 
 “Priority Debt” means the
sum, without duplication, of the amount of (i) Debt of the Issuer or any Issuer Restricted Subsidiary for borrowed money secured by any Lien pursuant to clause (ii) of the second paragraph of Section 910 and (ii) Debt Incurred
pursuant to paragraph (a) of Section 909 by a Domestic Restricted Subsidiary of the Issuer that is not a Guarantor and an Offering Proceeds Note Guarantor. 

  
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 “Priority Debt Cap” means, with respect to any Incurrence of Priority Debt, the
greatest of (A) $5,011,000,000, (B) 4.0 times Pro Forma Consolidated Cash Flow Available for Fixed Charges of the Issuer and the Issuer Restricted Subsidiaries for the four full fiscal quarters immediately preceding such Incurrence for which the
consolidated financial statements required to be delivered under this Indenture are available, and (C) 15.0% of the Issuer’s Consolidated Tangible Assets measured based on the most recent financial statements that are available for the Issuer,
each determined on a pro forma basis. 
 “Pro Forma Consolidated Cash Flow Available for Fixed Charges” for the Issuer and
the Issuer Restricted Subsidiaries for any period means Consolidated Cash Flow Available for Fixed Charges of Issuer and the Issuer Restricted Subsidiaries for such period, calculated in accordance with the definition thereof; provided,
however, that if (A) since the beginning of the applicable period the Issuer or any of the Issuer Restricted Subsidiaries shall have made one or more asset dispositions or an investment (by merger or otherwise) in any Issuer Restricted
Subsidiary (or any Person which becomes an Issuer Restricted Subsidiary) or an acquisition, merger or consolidation of Property which constitutes all or substantially all of an operating unit of a business or a line of business, or (B) since
the beginning of such period any Person (that subsequently became an Issuer Restricted Subsidiary or was merged with or into the Issuer or any of the Issuer Restricted Subsidiaries since the beginning of such period) shall have made such an asset
disposition, investment, acquisition, merger or consolidation, then Consolidated Cash Flow Available for Fixed Charges for such four full fiscal quarter period shall be calculated after giving pro forma effect to such asset dispositions,
investments, acquisitions, mergers or consolidations as if such asset dispositions, investments, acquisitions, mergers or consolidations occurred on the first day of such period. For purposes of this definition, Pro Forma Consolidated Cash Flow
Available for Fixed Charges shall include the amount of “run-rate” cost savings, operating expense reductions, other operating improvements and synergies projected by the Issuer in good faith to
result from (x) the consummation of such asset disposition, investment, acquisition, merger or consolidation and (y) any business optimization or cost savings initiatives (which, for the avoidance of doubt, shall include, without
limitation, the effect of inventory optimization programs, facility closures, facility consolidations, retention, systems establishment costs, contract termination costs and future lease commitments) that have been undertaken or with respect to
which substantial steps have been undertaken or are reasonably expected by the Issuer in good faith to be taken within twenty-four months of the date of the relevant calculation (calculated on a pro forma basis as though such cost savings, operating
expense reductions, other operating improvements and synergies had been realized on the first day of such period), net of the amount of actual benefits realized prior to or during such period from such actions; provided that (i) such
cost savings, operating expense reductions, other operating improvements or cost synergies are reasonably identifiable, reasonably attributable to the actions specified and reasonably anticipated to result from such actions and (ii) such
adjustments are set forth in an Officers’ Certificate which states (a) the amount of such adjustment or adjustments and (b) that such adjustment or adjustments are based on the reasonable good faith beliefs of the officers executing
such Officers’ Certificate. 
 “Property” means, with respect to any Person, any interest of such Person in any kind
of property or asset, whether real, personal or mixed, or tangible or intangible, including Capital Stock in, and other securities of, any other Person. For purposes of any calculation required pursuant to this Indenture, the value of any Property
shall be its Fair Market Value. 

  
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 “Purchase Amount” has the meaning specified in “Offer to
Purchase” above. 
 “Purchase Date” has the meaning specified in “Offer to Purchase” above. 

“Purchase Money Debt” means Debt (including Acquired Debt and Finance Lease Obligations, mortgage financings and purchase
money obligations) Incurred for the purpose of financing all or any part of the cost of construction, installation, acquisition, lease, development or improvement by the Issuer or any Issuer Restricted Subsidiary of any Telecommunications/IS Assets
of the Issuer or any Issuer Restricted Subsidiary and including any related notes, Guarantees, collateral documents, instruments and agreements executed in connection therewith, as the same may be amended, supplemented, modified, restated or
replaced from time to time. 
 “Purchase Price” has the meaning specified in “Offer to Purchase” above.

 “Qualified Credit Facility” means one or more credit agreements, loan agreements, or similar facilities, secured or
unsecured, providing for revolving credit loans, term loans and/or letters of credit, including any Qualified Receivable Facility, entered into from time to time by the Issuer or any of the Issuer Restricted Subsidiaries, or senior secured note
issuances, and including any related notes, Guarantees, collateral documents, instruments and agreements executed in connection therewith, as the same may be amended, supplemented, modified, restated or replaced from time to time, including, without
limitation, the Existing Credit Facility. 
 “Qualified Institutional Buyer” or “QIB” has the meaning
specified in Rule 144A. 
 “Qualified Receivable Facility” means Debt of the Issuer and any Issuer Restricted
Subsidiary Incurred from time to time pursuant to either (x) credit facilities secured by Receivables or (y) Receivables purchase facilities, and including any related notes, Guarantees, collateral documents, instruments and agreements
executed in connection therewith, as the same may be amended, supplemented, modified or restated from time to time. 
 “Rating
Agencies” means (1) each of Moody’s, S&P and Fitch and (2) if any of Moody’s, S&P or Fitch ceases to rate the Securities or fails to make a rating of the Securities publicly available for reasons outside of
Level 3 Parent’s control, a “nationally recognized statistical rating organization”, within the meaning of Section 3(a)(62) of the Exchange Act, selected by Level 3 Parent (as certified by a resolution of the Board of
Directors of Level 3 Parent) as a replacement agency for Moody’s, S&P, Fitch or each of them, as the case may be. 

“Rating Date” means the earlier of (i) the date of public notice of the occurrence of a Change of Control and
(ii) the date of public notice of the intention to effect a Change of Control. 
 “Rating Decline” shall be deemed to
have occurred if, no later than 60 days after the Rating Date (which period shall be extended so long as the rating of the Securities is under publicly announced consideration for possible downgrade by any of the Rating Agencies), two or more
of the Rating Agencies assign or reaffirm a rating to the Securities that is lower than the lesser of (i) the Issue Date Rating and (ii) the rating as of the Rating Date. A downgrade within rating categories, as well as between rating
categories, shall be considered a Rating Decline; provided that a Rating Decline otherwise arising by virtue of a particular reduction in rating shall not be deemed to have occurred in respect of a particular Change of Control (and thus shall
not be deemed a Rating Decline for purposes of the definition of Change 

  
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of Control Triggering Event) unless each of such two Rating Agencies making the reduction to rating announces or publicly confirms or informs the Issuer in writing at the Level 3
Parent’s or its request that the reduction was the result, in whole or in part, of any event or circumstance comprised of or arising as a result of, or in respect of the applicable Change of Control; provided further that
notwithstanding the foregoing, a Rating Decline shall not be deemed to have occurred so long as the Securities have an Investment Grade Rating as of the date that is 60 days after the Rating Date from at least two of the three Rating Agencies. A
“Rating Decline” also shall be deemed to have occurred if a Rating Decline (as defined in any indenture governing any of the Existing Notes) shall have occurred in respect of any of the Existing Notes so long as any of the Existing Notes
remain outstanding. For the avoidance of doubt, the Trustee shall not be charged with knowledge of, or be responsible for monitoring the ratings of, the Securities. 

“Receivables” means receivables, chattel paper, instruments, documents or intangibles evidencing or relating to the right to
payment of money and proceeds and products thereof in each case generated in the ordinary course of business. 
 “Redemption
Date”, when used with respect to any Security to be redeemed, in whole or in part, means the date fixed for such redemption by or pursuant to this Indenture. 

“Redemption Price”, when used with respect to any Security to be redeemed, means the price at which it is to be redeemed
pursuant to this Indenture. 
 “refinancing” has the meaning specified in Section 908(b)(vi). 

“Regulation S” means Regulation S under the Securities Act. 

“Regulation S Global Security” has the meaning specified in Section 2.1(a) of Appendix A. 

“Regulation S-X” means Regulation S-X under
the Securities Act and the Exchange Act. 
 “Responsible Officer”, when used with respect to the Trustee, means any officer
within the Trustee’s Corporate Trust Office, including any vice president, any assistant vice president, assistant secretary, senior associate, associate, trust officer, or any other officer of the Trustee customarily performing functions
similar to those performed by any of the above-designated officers, and also means, with respect to a particular corporate trust matter, any other officer to whom such matter is referred because of his knowledge of and familiarity with the
particular subject and who shall have direct responsibility for the administration of this Indenture. 
 “Restricted
Subsidiary” means (a) a Subsidiary of the Issuer that has not been designated or classified as an Unrestricted Subsidiary pursuant to and in compliance with Section 912 and (b) an Unrestricted Subsidiary that is redesignated
as a Restricted Subsidiary pursuant to such Section. 
 “Revocation” has the meaning specified in Section 912. 

“Rule 144A” means Rule 144A under the Securities Act. 

“Rule 144A Global Security” has the meaning specified in Section 2.1(a) of Appendix A. 

  
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 “S&P” means S&P Global Ratings, a division of S&P Global Inc., or,
if S&P Global Ratings shall cease rating debt securities having a maturity at original issuance of at least one year and such ratings business shall have been transferred to a successor Person, such successor Person; provided,
however, that if S&P Global Ratings ceases rating debt securities having a maturity at original issuance of at least one year and its ratings business with respect thereto shall not have been transferred to any successor Person, then
“S&P” shall mean any other nationally recognized rating agency (other than Moody’s and Fitch) that rates debt securities having a maturity at original issuance of at least one year and that shall have been designated to the
Trustee by a written notice given by the Issuer. 
 “Sale and Leaseback Transaction” of any Person means any direct or
indirect arrangement pursuant to which any Property is sold or transferred by such Person or a Restricted Subsidiary of such person and is thereafter leased back from the purchaser or transferee thereof by such Person or one of its Restricted
Subsidiaries; provided, however, that a transaction shall be treated as a Sale and Leaseback Transaction only to the extent that, in each case, the Attributable Value of the resulting lease or Finance Lease Obligation is greater than
75% of the net available proceeds resulting from the related asset disposition. The stated maturity of such arrangement shall be the date of the last payment of rent or any other amount due under such arrangement prior to the first date on which
such arrangement may be terminated by the lessee without payment of a penalty. 
 “Satisfaction Notification” means a
notification delivered by the Issuer to the Trustee in writing in the form of an Officers’ Certificate, stating that it has determined that Lumen has either (i) attained one of the Sustainability Performance Targets but not the other and
received a related Assurance Letter from the External Verifier or (ii) attained both of the Sustainability Performance Targets and received a related Assurance Letter from the External Verifier. The Satisfaction Notification shall also include
the applicable interest rate for the Securities. 
 “Science-Based Target No. 1” means Lumen’s
target to reduce the sum of its annualized absolute market-based Scope 1 Direct Emissions and Scope 2 Indirect Emissions by 18% by 2025 compared to Lumen’s 2018 base year emissions, which base year emissions are described in the Climate Change
Questionnaire and have been validated by the Science-Based Targets initiative, provided, however, that for purposes of determining if Science-Based Target No. 1 has been attained, Lumen and its consolidated subsidiaries may
exclude (A) tCO2e emissions attributable to any single or related series of acquisitions completed since the Issue Date by Lumen or any of its consolidated subsidiaries that individually, or in the aggregate in the case of a related series,
results in a material change to the operational boundaries identified for the 2018 base year as described in the Climate Change Questionnaire, or (B) the impact of any material amendment to, or change in, any applicable laws, regulations,
rules, guidelines and policies, applicable or relating to the communications or telecommunications business of Lumen and its consolidated subsidiaries following the Issue Date. 

“Science-Based Target No. 2” means Lumen’s target to reduce its annualized absolute upstream Scope 3
Other Indirect Emissions by 10% by 2025 compared to the 2018 base year emissions, which base year emissions are described in the Climate Change Questionnaire and have been validated by the Science-Based Targets initiative, provided,
however, that for purposes of determining if Science-Based Target No. 2 has been attained, Lumen and its consolidated subsidiaries may exclude (A) tCO2e emissions attributable to any single or related series of acquisitions
completed since the Issue Date by Lumen or any of its consolidated subsidiaries that individually, or in the aggregate in the case of a related series, results in a material change to the operational boundaries identified for the 2018 base year as
described in the 

  
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Climate Change Questionnaire, or (B) the impact of any material amendment to, or change in, any applicable laws, regulations, rules, guidelines and policies, applicable or relating to the
communications or telecommunications business of Lumen and its consolidated subsidiaries following the Issue Date. 
 “Scope 1
Direct Emissions” means direct tCO2e market-based emissions attributable to sources owned or controlled by Lumen and its consolidated subsidiaries, including emissions from combustion in owned or controlled boilers, furnaces, emergency
generators, aircraft, and vehicles, as determined in accordance with the GHG Protocol and calculated in good faith by the Issuer. 

“Scope 2 Indirect Emissions” means indirect tCO2e market-based emissions primarily attributable to purchased electricity
consumed by Lumen and its consolidated subsidiaries, including the consumption of all purchased heat, steam and cooling, as measured at the facility where such electricity is generated, all as determined in accordance with the GHG Protocol and
calculated in good faith by the Issuer. 
 “Scope 3 Other Indirect Emissions” means indirect tCO2e upstream emissions
(other than Scope 2 Indirect Emissions) attributable as a consequence of activities of Lumen and its consolidated subsidiaries, but from sources not owned or controlled by Lumen or its consolidated subsidiaries, including the extraction and
production of purchased goods and services, capital goods, business travel, fuel and energy-related activities not included as Scope 1 Direct Emissions or Scope 2 Indirect Emissions, waste generated in connection with operations, and upstream
transportation and distribution activities, all as determined in accordance with the GHG Protocol and calculated in good faith by the Issuer. 

“Screened Affiliate” means any Affiliate of a Holder (i) that makes investment decisions independently from such Holder
and any other Affiliate of such Holder that is not a Screened Affiliate, (ii) that has in place customary information screens between it and such Holder and any other Affiliate of such Holder that is not a Screened Affiliate and such screens
prohibit the sharing of information with respect to Level 3 Parent or the Issuer’s subsidiaries, (iii) whose investment policies are not directed by such Holder or any other Affiliate of such Holder that is acting in concert with such
Holder in connection with its investment in the Securities, and (iv) whose investment decisions are not influenced by the investment decisions of such Holder or any other Affiliate of such Holder that is acting in concert with such Holders in
connection with its investment in the Securities. 
 “Securities” has the meaning stated in the first recital of this
Indenture and more particularly means any Securities authenticated and delivered under this Indenture. 
 “Securities Act”
means the Securities Act of 1933, as amended (or any successor act), and the rules and regulations thereunder (or respective successors thereto). 

“Security Register” and “Security Registrar” have the respective meanings specified in Section 303.

 “Short Derivative Instrument” means a Derivative Instrument (i) the value of which generally decreases, and/or the
payment or delivery obligations under which generally increase, with positive changes to the Performance References and/or (ii) the value of which generally increases, and/or the payment or delivery obligations under which generally decrease,
with negative changes to the Performance References. 

  
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 “Significant Subsidiary” means any Subsidiary that would be a
“Significant Subsidiary” of Level 3 Parent within the meaning of Rule 1-02 under Regulation S-X promulgated by the Commission. 

“Special Assets” means (a) the Capital Stock or assets of RCN Corporation and Commonwealth Telephone Enterprises, Inc.
(and any intermediate holding companies or other entities formed solely for the purpose of owning such Capital Stock or assets) owned, directly or indirectly, by the Issuer or any Issuer Restricted Subsidiary on the Measurement Date, and
(b) any Property, other than cash, Cash Equivalents and Telecommunications/IS Assets, received as consideration for the disposition after the Measurement Date of Special Assets. 

“Stated Maturity” when used with respect to a Security or any installment of interest thereon, means the date specified in
such Security as the fixed date on which the principal of such Security or such installment of interest is due and payable, including pursuant to any mandatory redemption provision (but excluding any provision providing for the repurchase of such
Security at the option of the Holder thereof upon the happening of any contingency beyond the control of the Issuer unless such contingency has occurred). 

“Subsidiary” of any Person means (i) a corporation more than 50% of the combined voting power of the outstanding Voting
Stock of which is owned, directly or indirectly, by such Person or by one or more other Subsidiaries of such Person or by such Person and one or more Subsidiaries thereof or (ii) any other Person (other than a corporation) in which such Person,
or one or more other Subsidiaries of such Person or such Person and one or more other Subsidiaries thereof, directly or indirectly, has at least a majority ownership and power to direct the policies, management and affairs thereof. 

“Sustainability Performance Targets” means Science-Based Target No. 1 and Science-Based Target No. 2, referred to
collectively. 
 “tCO2e” means the amount of greenhouse gasses emitted during a given period, measured in metric tons of
carbon dioxide equivalent, determined in accordance with the World Resources Institute and the World Business Council for Sustainable Development’s Greenhouse Gas Protocols (March 2004). 

“Telecommunications/IS Assets” means (a) any Property (other than cash, cash equivalents and securities) to be owned by
the Issuer or any Issuer Restricted Subsidiary and used in the Telecommunications/IS Business; (b) for purposes of Sections 908 and 910 only, Capital Stock of any Person; or (c) for all other purposes of this Indenture, Capital Stock of a
Person that becomes an Issuer Restricted Subsidiary as a result of the acquisition of such Capital Stock by the Issuer or another Issuer Restricted Subsidiary from any Person other than an Affiliate of Level 3 Parent; provided,
however, that, in the case of clause (b) or (c), such Person is primarily engaged in the Telecommunications/IS Business. 

“Telecommunications/IS Business” means the business of (i) transmitting, or providing services relating to the
transmission of, voice, video or data through owned or leased transmission facilities, (ii) constructing, creating, developing or marketing communications networks, related network transmission equipment, software and other devices for use in a
communications business, (iii) computer outsourcing, data center management, computer systems integration, reengineering of computer software for any purpose or (iv) evaluating, participating or pursuing any other activity or opportunity
that is primarily related to those identified in (i), (ii) or (iii) above; provided, however, that the determination of what constitutes a Telecommunications/IS Business shall be made in good faith by the Board of Directors of
Level 3 Parent or a duly authorized committee thereof. 

  
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 “Trust Indenture Act” means the Trust Indenture Act of 1939 as in effect at the
date as of which this Indenture was executed. 
 “Trustee” means the Person named as the “Trustee” in the
first paragraph of this Indenture until a successor Trustee shall have become such pursuant to the applicable provisions of this Indenture, and thereafter “Trustee” shall mean such successor Trustee. 

“Unrestricted Subsidiary” means (a) any Subsidiary of the Issuer designated as such pursuant to and in compliance with
Section 912 and not thereafter redesignated as a Restricted Subsidiary as permitted pursuant thereto and (b) any Subsidiary of an Unrestricted Subsidiary. For the sake of clarity, actions taken by an Unrestricted Subsidiary will not be
deemed to have been taken, directly or indirectly, by the Issuer or any of the Issuer Restricted Subsidiaries. 
 “Verification
Covenant” means a covenant by a Directing Holder to provide the Issuer with such other information as the Issuer may reasonably request from time to time in order to verify the accuracy of such Holder’s Position Representation within
five Business Days of request therefor. 
 “Vice President”, when used with respect to any Person, means any vice
president, whether or not designated by a number or a word or words added before or after the title “vice president”. 

“Voting Stock” of any Person means Capital Stock of such Person which ordinarily has voting power for the election of
directors (or persons performing similar functions) of such Person, whether at all times or only for so long as no senior class of securities has such voting power by reason of any contingency. 

“Wholly Owned Restricted Subsidiary” of the Issuer means a Wholly Owned Subsidiary of the Issuer that is a Restricted
Subsidiary. 
 “Wholly Owned Subsidiary” of any Person means a Subsidiary of such Person all of the outstanding Voting
Stock or other ownership interests (other than directors’ qualifying shares) of which shall at the time be owned by such Person or by one or more Wholly Owned Subsidiaries of such Person or by such Person and one or more Wholly Owned
Subsidiaries of such Person. 
 The following terms, unless otherwise defined pursuant to this Section 101, have the meanings given to
them in Appendix A: 
 “Definitive Security” 

“Purchase Agreement” 

“Rule 144A Global Security” 

“Transfer Restricted Securities” 

SECTION 102.    Compliance Certificates and Opinions. 

Upon any application or request by the Issuer to the Trustee to take any action under any provision of this Indenture, the Issuer shall furnish
to the Trustee an Officers’ Certificate stating that all conditions precedent, if any, provided for in this Indenture (including any covenant compliance with which constitutes a condition precedent) relating to the proposed action have been
complied with and an Opinion of Counsel stating that in the opinion of such counsel all such conditions precedent, if any, have been complied with. 

  
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 Every certificate or opinion with respect to compliance with a condition or covenant provided for
in this Indenture shall include: 
 (1)    a statement that each individual signing such certificate or
opinion has read such covenant or condition and the definitions herein relating thereto; 
 (2)    a
brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such certificate or opinion are based; 

(3)    a statement that, in the opinion of each such individual, he has made such examination or
investigation as is necessary to enable him to express an informed opinion as to whether or not such covenant or condition has been complied with; and 

(4)    a statement as to whether, in the opinion of each such individual, such condition or covenant has
been complied with. 
 SECTION 103.    Form of Documents Delivered to Trustee. 

In any case where several matters are required to be certified by, or covered by an opinion of, any specified Person, it is not necessary that
all such matters be certified by, or covered by the opinion of, only one such Person, or that they be so certified or covered by only one document, but one such Person may certify or give an opinion with respect to some matters and one or more other
such Persons as to other matters, and any such Person may certify or give an opinion as to such matters in one or several documents. 
 Any
certificate or opinion of an officer of the Issuer or any Guarantor may be based, insofar as it relates to legal matters, upon a certificate or opinion of, or representations by, counsel, unless such officer knows, or in the exercise of reasonable
care should know, that the certificate or opinion or representations with respect to the matters upon which his certificate or opinion is based are erroneous. Any such certificate or Opinion of Counsel may be based, insofar as it relates to factual
matters, upon a certificate or opinion of, or representations by, an officer or officers of the Issuer or any Guarantor, respectively, stating that the information with respect to such factual matters is in the possession of the Issuer or any
Guarantor, respectively, unless such counsel knows, or in the exercise of reasonable care should know, that the certificate or opinion or representations with respect to such matters are erroneous. 

Where any Person is required to make, give or execute two or more applications, requests, consents, certificates, statements, opinions or
other instruments under this Indenture, they may, but need not, be consolidated (with proper identification of each matter covered therein) and form one instrument. 

SECTION 104.    Acts of Holders. 

(a)    Any request, demand, authorization, direction, notice, consent, waiver or other action provided by this Indenture to
be given or taken by Holders may be embodied in and evidenced by one or more instruments of substantially similar tenor signed by such Holders in person or by agents duly appointed in writing; and, except as herein otherwise expressly provided, such
action shall become effective when such instrument or instruments are delivered to the Trustee and, where it is hereby 

  
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expressly required, to the Issuer. Such instrument or instruments (and the action embodied therein and evidenced thereby) are herein sometimes referred to as the “Act” of the
Holders signing such instrument or instruments. Proof of execution of any such instrument or of a writing appointing any such agent shall be sufficient for any purpose of this Indenture and (subject to Section 601) conclusive in favor of the
Trustee and the Issuer, if made in the manner provided in this Section. 
 (b)    The fact and date of the execution by
any Person of any such instrument or writing may be proved by the affidavit of a witness of such execution or by a certificate of a notary public or other officer authorized by law to take acknowledgments of deeds, certifying that the individual
signing such instrument or writing acknowledged to him the execution thereof. Where such execution is by a signer acting in a capacity other than his individual capacity, such certificate or affidavit shall also constitute sufficient proof of
authority. The fact and date of the execution of any such instrument or writing, or the authority of the Person executing the same, may also be proved in any other manner that the Trustee deems sufficient. 

(c)    The principal amount and serial numbers of Securities held by any Person, and the date of holding the same, shall
be proved by the Security Register. 
 (d)    If the Issuer shall solicit from the Holders of Securities any request,
demand, authorization, direction, notice, consent, waiver or other Act, the Issuer may, at its option, by or pursuant to a Board Resolution, fix in advance a record date for the determination of Holders entitled to give such request, demand,
authorization, direction, notice, consent, waiver or other Act, but the Issuer shall have no obligation to do so. Such record date shall be the record date specified in or pursuant to such Board Resolution, which shall be a date not earlier than the
date 30 days prior to the first solicitation of Holders generally in connection therewith and not later than the date such solicitation is completed. If such a record date is fixed, such request, demand, authorization, direction, notice,
consent, waiver or other Act may be given before or after such record date, but only the Holders of record at the close of business on such record date shall be deemed to be Holders for the purposes of determining whether Holders of the requisite
proportion of Outstanding Securities have authorized or agreed or consented to such request, demand, authorization, direction, notice, consent, waiver or other Act, and for that purpose the Outstanding Securities shall be computed as of such record
date; provided that no such authorization, agreement or consent by the Holders on such record date shall be deemed effective unless it shall become effective pursuant to the provisions of this Indenture not later than six months after the
record date. 
 (e)    Any request, demand, authorization, direction, notice, consent, waiver or other Act of the Holder
of any Security shall bind every future Holder of the same Security and the Holder of every Security issued upon the registration of transfer thereof or in exchange therefor or in lieu thereof in respect of anything done, omitted or suffered to be
done by the Trustee or the Issuer in reliance thereon, whether or not notation of such action is made upon such Security. However, any such Holder or future Holder may revoke the request, demand, authorization, direction, notice, consent, waiver or
other Act of the Holder as to such Holder’s Security or portion of the Security if the Trustee receives the notice of revocation before the date such Act becomes effective. 

SECTION 105.    Notices to Trustee and the Issuer. 

Any request, demand, authorization, direction, notice, consent, waiver or Act of Holders or other document provided or permitted by this
Indenture to be made upon, given or furnished to, or filed with, 

  
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 (1)    the Trustee by any Holder or by the Issuer shall be
sufficient for every purpose hereunder if made, given, furnished or filed in writing to or with the Trustee at its Corporate Trust Office, Attention: Corporate Trust Administration; such Notice to be effective only upon receipt, or 

(2)    the Issuer or any Guarantor by the Trustee or by any Holder shall be sufficient for every purpose
hereunder (unless otherwise herein expressly provided) if in writing and mailed, first-class postage prepaid, or electronically to the Issuer or such Guarantor addressed to it (in the case of a Guarantor, in care of the Issuer) at the address of the
Issuer’s principal office specified in the first paragraph of this Indenture or at any other address previously furnished in writing to the Trustee by the Issuer. 

The Trustee agrees to accept and act upon instructions or directions pursuant to this Indenture sent by unsecured e-mail, pdf, facsimile transmission or other similar unsecured electronic methods, provided, however, that the Trustee shall have received an incumbency certificate listing persons designated to give
such instructions or directions and containing specimen signatures of such designated persons, which such incumbency certificate shall be amended and replaced whenever the Issuer determines that a person is to be added or deleted from the listing.
If the Issuer elects to give the Trustee e-mail or facsimile instructions (or instructions by a similar electronic method) and the Trustee in its discretion elects to act upon such instructions, the
Trustee’s understanding of such instructions shall be deemed controlling. Except to the extent relating to matters arising out of the Trustee’s gross negligence or willful misconduct, the Trustee shall not be liable for any losses, costs
or expenses arising directly or indirectly from the Trustee’s reliance upon and compliance with such instructions notwithstanding that such instructions conflict or are inconsistent with a subsequent written instruction. The Issuer agrees to
assume all risks arising out of the use of such electronic methods to submit instructions and directions to the Trustee, including without limitation the risk of the Trustee acting on unauthorized instructions, and the risk or interception and
misuse by third parties. 
 SECTION 106.    Notice to Holders; Waiver. 

Where this Indenture provides for notice of any event to Holders by the Issuer or the Trustee, such notice shall be given (unless otherwise
herein expressly provided) if in writing and mailed, first-class postage prepaid, to each Holder affected by such event, at the address of such Holder as it appears in the Security Register, not later than the latest date, and not earlier than the
earliest date, prescribed for the giving of such notice. In any case where notice to Holders is given by mail, neither the failure to mail such notice, nor any defect in any notice so mailed, to any particular Holder shall affect the sufficiency of
such notice with respect to other Holders. Notices shall be effective only upon receipt. Notwithstanding the forgoing, in all events where the registered Holder is DTC or another depositary such notice shall be fully effective upon delivery to DTC
or such applicable depositary, and shall be transmitted in accordance with the procedures of DTC or such applicable depositary. Where this Indenture provides for notice in any manner, such notice may be waived in writing by the Person entitled to
receive such notice, either before or after the event, and such waiver shall be the equivalent of such notice. Waivers of notice by Holders shall be filed with the Trustee, but such filing shall not be a condition precedent to the validity of any
action taken in reliance upon such waiver. 
 In case by reason of the suspension of or irregularities in regular mail service or by reason
of any other cause, it shall be impracticable to mail notice of any event to Holders when such notice is required 

  
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to be given pursuant to any provision of this Indenture, then any manner of giving such notice as shall be satisfactory to the Trustee shall be deemed to be a sufficient giving of such notice for
every purpose hereunder. 
 SECTION 107.    Effect of Headings and Table of Contents. 

The Article and Section headings herein and the Table of Contents are for convenience only and shall not affect the construction hereof.

 SECTION 108.    Successors and Assigns. 

All covenants and agreements in this Indenture by the Issuer and Level 3 Parent shall bind its successors and assigns, whether so
expressed or not. 
 SECTION 109.    Separability Clause. 

In case any provision in this Indenture or in the Securities shall be invalid, illegal or unenforceable, the validity, legality and
enforceability of the remaining provisions shall not in any way be affected or impaired thereby. 
 SECTION
110.    Benefits of Indenture. 
 Nothing in this Indenture or in the Securities, express or implied, shall give
to any Person, other than the parties hereto, any Paying Agent, any Security Registrar and their successors hereunder and the Holders any legal or equitable right, remedy or claim under this Indenture. 

SECTION 111.    Governing Law. 

THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAW OF THE STATE OF NEW YORK BUT WITHOUT
GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

SECTION 112.    Trust Indenture Act.  

For the avoidance of doubt, the Trust Indenture Act is not applicable to this Indenture. 

SECTION 113.    Legal Holidays. 

In any case where any Interest Payment Date, Redemption Date, or Stated Maturity or Maturity of any Security shall not be a Business Day, then
(notwithstanding any other provision of this Indenture or of the Securities) payment of principal (or premium, if any) and/or interest, as the case may be, need not be made on such date, but shall be made on the next succeeding Business Day with the
same force and effect as if made on the Interest Payment Date or Redemption Date or at the Stated Maturity or Maturity; provided that no interest shall accrue in respect of such payment for the period from and after such Interest Payment
Date, Redemption Date, Stated Maturity or Maturity to the next Business Day, as the case may be. 

  
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 SECTION 114.    No Personal Liability of Directors, Officers, Employees
and Stockholders. 
 No director, officer, employee, incorporator or stockholder of the Issuer or any Guarantor, as such, shall have any
liability for any obligations of the Issuer or any Guarantor under the Securities or this Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation, solely by reason of its status as a director, officer,
employee, incorporator or stockholder of the Issuer or a Guarantor. By accepting a Security, each Holder waives and releases all such liability (but only such liability). The waiver and release are part of the consideration for issuance of the
Securities. 
 SECTION 115.    Independence of Covenants. 

All covenants and agreements in this Indenture shall be given independent effect so that if a particular action or condition is not permitted
by any of such covenants, the fact that it would be permitted by an exception to, or be otherwise within the limitations of, another covenant shall not avoid the occurrence of a Default if such action is taken or condition exists. 

SECTION 116.    Exhibits. 

All exhibits attached hereto are by this reference made a part hereof with the same effect as if herein set forth in full. 

SECTION 117.    Counterparts. 

This Indenture may be executed in any number of counterparts, each of which shall be an original; but such counterparts shall together
constitute but one and the same instrument. 
 SECTION 118.    Duplicate Originals. 

The parties may sign any number of copies of this Indenture. Each signed copy shall be an original, but all of them together represent the same
agreement. 
 SECTION 119.    Waiver of Jury Trial. 

EACH OF LEVEL 3 PARENT, THE ISSUER, THE HOLDERS BY ACCEPTANCE OF THE SECURITIES AND THE TRUSTEE HEREBY IRREVOCABLY WAIVES, TO THE FULLEST
EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS INDENTURE, THE SECURITIES OR THE TRANSACTIONS CONTEMPLATED HEREBY. 

SECTION 120.    Force Majeure. 

In no event shall the Trustee be responsible or liable for any failure or delay in the performance of its obligations hereunder arising out of
or caused by, directly or indirectly, forces beyond its control, including, without limitation, strikes, work stoppages, accidents, acts of war or terrorism, civil or military disturbances, nuclear or natural catastrophes or acts of God, and
interruptions, loss or malfunctions of utilities, communications or computer (software and hardware) services; it being understood that the Trustee shall use reasonable efforts which are consistent with accepted practices in the banking industry to
resume performance as soon as practicable under the circumstances. 

  
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 SECTION 121.    FATCA. 

In order to assist the Trustee with its compliance with Sections 1471 through 1474 of the Code and regulations thereunder (as in effect from
time to time, collectively, the “Applicable Law”), the Issuer agrees (i) to provide to the Trustee reasonably available information collected and stored in the Issuer’s ordinary course of business regarding Holders of
Securities (solely in their capacity as such) and which is necessary for the Trustee’s determination of whether it has tax related obligations under Applicable Law and (ii) that the Trustee shall be entitled to make any withholding or
deduction from payments under this Indenture to the extent necessary to comply with Applicable Law. Nothing in the immediately preceding sentence shall be construed as obligating the Issuer to make any “gross up” payment or similar
reimbursement in connection with a payment in respect of which amounts are so withheld or deducted. 
 SECTION
122.    Submission to Jurisdiction. 
 The parties irrevocably submit to the
non-exclusive jurisdiction of any New York State or federal court sitting in the Borough of Manhattan, City of New York, over any suit, action or proceeding arising out of or relating to this Indenture. To the
fullest extent permitted by applicable law, the parties irrevocably waive and agree not to assert, by way of motion, as a defense or otherwise, any claim that it is not subject to the jurisdiction of any such court, any objection that it may now or
hereafter have to the laying of the venue of any such suit, action or proceeding brought in any such court and any claim that any such suit, action or proceeding brought in any such court has been brought in an inconvenient forum. 

SECTION 123.    Limited Condition Transactions. 

For purposes of (i) determining compliance with any provision in this Indenture that requires the calculation of any financial ratio or
test, (ii) determining compliance with the requirement regarding the absence of a Default or Event of Default (or any type of Default or Event of Default) or (iii) testing any ratio or cap measured as a percentage of Pro Forma Consolidated
Cash Flow Available for Fixed Charges and any other availability of a “basket” or exception set forth in this Indenture, in each case, in connection with a Limited Condition Transaction, the date of determination, at the election of the
Issuer (the Issuer’s election to exercise such option in connection with any Limited Condition Transaction, an “LCT Election”), shall be deemed to be at the time of (on the basis of the consolidated financial statements
required to be delivered under Section 905 for the most recently ended four fiscal quarter period) either (x) the execution of the definitive acquisition agreements or other binding contracts with respect to such transaction, or
(y) the consummation of such transaction (such applicable date, the “LCT Test Date”), and if, after such ratios and other provisions are measured on a pro forma basis (determined in accordance with the applicable provisions of
this Indenture) after giving effect to the Limited Condition Transaction and the other transactions to be entered into in connection therewith (including any Incurrence of Debt and the use of proceeds thereof) as if they had occurred at the
beginning of the most recently completed four fiscal quarter period ending prior to the LCT Test Date, the Issuer could have taken such action on the relevant LCT Test Date in compliance with such ratios, absence of Default or Event of Default or
“basket”, such ratio, absence of Default or Event of Default or “basket” shall be deemed to have been complied with. 

For the avoidance of doubt, if the Issuer has made an LCT Election and (x) any of the ratios or “baskets” for which compliance
was determined or tested as of the LCT Test Date are exceeded as a result of fluctuations in any such ratio or “basket” (including due to fluctuations of the target of any Limited 

  
 33 








 
Condition Transaction) at or prior to the consummation of the relevant Limited Condition Transaction, such “baskets” or ratios and other provisions shall not be deemed to have been
exceeded as a result of such fluctuations solely for purposes of determining whether the Limited Condition Transaction is permitted hereunder and (y) in connection with any subsequent calculation of any ratio or “basket” availability
on or following the relevant LCT Test Date and prior to the earlier of (i) the date on which such Limited Condition Transaction is consummated or (ii) the date that the definitive agreement for such Limited Condition Transaction is
terminated or expires without consummation of such Limited Condition Transaction, any such ratio or “basket” availability shall be calculated on a pro forma basis (determined in accordance with the applicable provisions of this Indenture)
assuming such Limited Condition Transaction and other transactions in connection therewith (including any Incurrence of Debt and the use of proceeds thereof (but without netting the cash proceeds thereof)) had been consummated. 

SECTION 124.    Electronic Signatures. 

For the avoidance of doubt, for all purposes of this Indenture and any document to be signed or delivered in connection with or pursuant to
this Indenture (except where a manual signature is expressly required by the terms of this Indenture), the words “execution,” “signed,” “signature,” “delivery,” and words of like import shall be deemed to
include electronic signatures, deliveries or the keeping of records in electronic form, as the case may be, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery or the use of
a paper-based recordkeeping system, as the case may be, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means.

ARTICLE TWO 
 SECURITY FORMS 

SECTION 201.    Form and Dating. 

Provisions relating to the Securities are set forth in Appendix A, which is hereby incorporated in and expressly made part of this
Indenture. The Securities and the Trustee’s certificate of authentication shall be substantially in the form of Exhibit 1 to Appendix A which is hereby incorporated in and expressly made a part of this Indenture. The Securities may
have notations, legends or endorsements required by law, stock exchange rule, agreements to which the Issuer is subject, if any, or usage, provided that any such notation, legend or endorsement is in a form reasonably acceptable to the Issuer. Each
Security shall be dated the date of its authentication. The terms of the Securities set forth in Exhibit 1 to Appendix A are part of the terms of this Indenture. 

The Definitive Securities shall be printed, lithographed or engraved on steel-engraved borders or may be produced in any other manner
permitted by the rules of any securities exchange or system on which the Securities may be listed or eligible for trading, all as determined by the officers of the Issuer executing such Securities, as evidenced by their execution of such Securities.


  
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 ARTICLE THREE 

THE SECURITIES 
 SECTION
301.    Amount of Securities. Subject to Section 302, the Trustee shall authenticate Securities for original issue on the Issue Date in the aggregate principal amount of $900,000,000 (the “Original
Securities”). 
 The Issuer shall be entitled, subject to its compliance with the covenants set forth in this Indenture, including
Section 908, to issue Additional Securities under this Indenture which shall have identical terms as the Original Securities, other than with respect to the issuance prices, issuance dates and initial interest payment dates (and such changes as
are customary to permit escrow arrangements, if any, in connection with the issuance of such Additional Securities); provided that a separate CUSIP or ISIN shall be issued for any Additional Securities if the Additional Securities are not
fungible for U.S. federal income tax purposes with the Original Securities. The Original Securities and any Additional Securities issued in exchange therefor shall be treated as a single class for all purposes under this Indenture. 

With respect to the Additional Securities, the Issuer shall set forth in a Board Resolution and an Officers’ Certificate, a copy of each
of which shall be delivered to the Trustee, the following information: 
 (1)    the aggregate principal
amount of such Additional Securities to be authenticated and delivered pursuant to this Indenture; 

(2)    the issue price, the issue date and the CUSIP number of such Additional Securities; provided,
however, that no Additional Securities may be issued after the expiration of the “period of thirteen days” described in Treasury Regulation Section 1.1275-1(f)(1)(iii) unless such
issuance would be a “qualified reopening” within the meaning of Treasury Regulation Section 1.1275-2(k)(3); and 

(3)    whether such Additional Securities shall be Transfer Restricted Securities and issued in the form of
Securities as set forth in Appendix A to this Indenture. 
 For each issuance of Additional Securities, the Issuer shall use the net
proceeds of each such issuance and additional funds as necessary to lend to Level 3 LLC an amount equal to the principal amount of the Additional Securities so issued, and the principal amount of the Offering Proceeds Note shall be increased by
such amount. 
 SECTION 302.    Execution and Authentication. Two officers shall sign the Securities for the
Issuer by manual, facsimile or electronic signature. 
 If an officer whose signature is on a Security no longer holds that office at the
time the Trustee authenticates the Security, the Security shall be valid nevertheless. 
 At any time and from time to time after the
execution and delivery of this Indenture, the Issuer may deliver Securities executed by the Issuer to the Trustee for authentication, together with an Issuer Order for the authentication and delivery of such Securities, an Officers’ Certificate
and an Opinion of Counsel and the Trustee in accordance with such written order of the Issuer shall authenticate and deliver such Securities. 

  
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 A Security shall not be valid until an authorized signatory of the Trustee manually,
electronically or by facsimile signs the certificate of authentication on the Security. The signature shall be conclusive evidence that the Security has been authenticated under this Indenture. 

The Trustee may appoint an authenticating agent reasonably acceptable to the Issuer to authenticate the Securities. Unless limited by the
terms of such appointment, an authenticating agent may authenticate Securities whenever the Trustee may do so. Each reference in this Indenture to authentication by the Trustee includes authentication by such agent. An authenticating agent has the
same rights as any Security Registrar, Paying Agent or agent for service of notices and demands. 
 SECTION
303.    Security Registrar and Paying Agent. The Issuer shall maintain an office or agency in the City of New York where Securities may be presented for registration of transfer or for exchange (the “Security
Registrar”) and an office or agency in the City of New York where Securities may be presented for payment to the Paying Agent. The Security Registrar shall keep a register of the Securities and of their transfer and exchange (the register
maintained in the office of the Security Registrar and in any other office or agency designated pursuant to Section 902 being herein sometimes referred to as the “Security Register”). The Issuer may have one or more co-registrars and one or more additional paying agents. The term “Paying Agent” includes any additional paying agent. 

The Issuer shall enter into an appropriate agency agreement with any Security Registrar, Paying Agent or
co-registrar not a party to this Indenture. The agreement shall implement the provisions of this Indenture that relate to such agent. The Issuer shall notify the Trustee of the name and address of any such
agent. If the Issuer fails to maintain a Security Registrar or Paying Agent, the Trustee shall act as such and shall be entitled to appropriate compensation therefor pursuant to Section 607. 

The Issuer initially appoints the Trustee as Security Registrar and Paying Agent in connection with the Securities. 

SECTION 304.    Paying Agent To Hold Money in Trust. Prior to each due date of the principal and interest on any
Security, the Issuer shall deposit with the Paying Agent a sum sufficient to pay such principal and interest when so becoming due. The Issuer shall require each Paying Agent (other than the Trustee) to agree in writing that the Paying Agent shall
hold in trust for the benefit of Holders or the Trustee all money held by the Paying Agent for the payment of principal of or interest on the Securities and shall notify the Trustee of any default by the Issuer in making any such payment. If the
Issuer or a Wholly Owned Subsidiary acts as Paying Agent, it shall segregate the money held by it as Paying Agent and hold it as a separate trust fund. The Issuer at any time may require a Paying Agent to pay all money held by it to the Trustee and
to account for any funds disbursed by the Paying Agent. Upon complying with this Section, the Paying Agent shall have no further liability for the money delivered to the Trustee. 

SECTION 305.    Holders Lists. The Trustee shall preserve in as current a form as is reasonably practicable the
most recent list available to it of the names and addresses of Holders. If the Trustee is not the Security Registrar, upon a written request by the Trustee, the Issuer shall furnish to the Trustee, in writing at least five Business Days before each
Interest Payment Date and at such other times as the Trustee may reasonably request in writing, a list in such form and as of such date as the Trustee may reasonably require of the names and addresses of Holders. 

  
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 SECTION 306.    Replacement Securities. If a mutilated Security is
surrendered to the Security Registrar or if the Holder of a Security claims that such Security has been lost, destroyed or wrongfully taken, the Issuer shall issue and the Trustee shall authenticate a replacement Security if the requirements of Section 8-405 of the Uniform Commercial Code are met and the Holder satisfies any other reasonable requirements of the Trustee. Such Holder shall furnish an indemnity bond sufficient in the judgment of the
Issuer and the Trustee to protect the Issuer, the Trustee, the Paying Agent, the Security Registrar and any co-registrar from any loss which any of them may suffer if a Security is replaced. The Issuer and the
Trustee may charge the Holder for their expenses in replacing a Security. 
 Every replacement Security is an additional obligation of the
Issuer. 
 SECTION 307.    Temporary Securities. Until Definitive Securities are ready for delivery, the Issuer
may prepare and the Trustee shall authenticate temporary Securities. Temporary Securities shall be substantially in the form of Definitive Securities but may have variations that the Issuer considers appropriate for temporary Securities. Without
unreasonable delay, the Issuer shall prepare and the Trustee shall authenticate Definitive Securities and deliver them in exchange for temporary Securities. 

SECTION 308.    Cancellation. The Issuer at any time may deliver Securities to the Trustee for cancellation. The
Security Registrar and the Paying Agent shall forward to the Trustee any Securities surrendered to them for registration of transfer, exchange or payment. The Trustee and no one else shall cancel and dispose of in accordance with its customary
procedures (subject to the record retention requirements of the Exchange Act) all Securities surrendered for registration of transfer, exchange, payment or cancellation unless the Issuer directs the Trustee in writing to deliver canceled Securities
to the Issuer. The Issuer shall not issue new Securities to replace Securities it has redeemed, paid or delivered to the Trustee for cancellation. 

SECTION 309.    Defaulted Interest. If the Issuer defaults in a payment of interest on the Securities, the Issuer
shall pay the defaulted interest (plus interest on such defaulted interest to the extent lawful) in any lawful manner. The Issuer may pay the defaulted interest to the persons who are Holders on a subsequent special record date. The Issuer shall fix
or cause to be fixed any such special record date and payment date to the reasonable satisfaction of the Trustee and shall promptly mail to each Holder a notice that states the special record date, the payment date and the amount of defaulted
interest to be paid. 
 SECTION 310.    CUSIP Numbers. The Issuer in issuing the Securities may use
“CUSIP” numbers (if then generally in use) and, if so, the Trustee shall use “CUSIP” numbers in notices of redemption as a convenience to Holders; provided, however, that neither the Issuer nor the Trustee
shall have any responsibility for any defect in the “CUSIP” number that appears on any Security, check, advice of payment or redemption notice, and any such notice may state that no representation is made as to the correctness of such
numbers either as printed on the Securities or as contained in any notice of a redemption and that reliance may be placed only on the other identification numbers printed on the Securities, and any such redemption shall not be affected by any defect
in or omission of such numbers. The Issuer will promptly notify the Trustee in writing of any change in the “CUSIP” number(s). 

  
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 ARTICLE FOUR 

SATISFACTION AND DISCHARGE 

SECTION 401.    Satisfaction and Discharge of Indenture.  

This Indenture shall cease to be of further effect (subject to Section 1106 and except as to surviving rights of registration of transfer,
transfer, exchange and replacement of Securities expressly provided for herein or pursuant hereto) and the Trustee, at the request and expense of the Issuer, shall execute proper instruments acknowledging satisfaction and discharge of this Indenture
when 
 (1)    either 

(a)    all Outstanding Securities have been delivered to the Trustee for cancellation; or 

(b)    all such Securities not theretofore delivered to the Trustee for cancellation 

(i) have become due and payable, or 

(ii) will become due and payable within one year, or 

(iii) are to be called for redemption within one year under irrevocable arrangements satisfactory to the Trustee in its sole
discretion for the giving of notice of redemption by the Trustee in the name and at the expense of the Issuer, 
 and the Issuer, in the case
of (i), (ii) or (iii) above, has irrevocably deposited or caused to be deposited with the Trustee funds in an amount sufficient to pay and discharge the entire indebtedness on the Securities not theretofore delivered to the Trustee for
cancellation, for principal of (and premium, if any, on), and interest on (calculated for purposes of any interest period beginning on or after the Interest Rate Step Up Date that has not commenced prior to such deposit at the Fully-Adjusted
Subsequent Interest Rate if the Satisfaction Notification has not previously been delivered to the Trustee), the Securities to Maturity or the Redemption Date, as the case may be; 

(2)    the Issuer has paid or caused to be paid all other sums payable by the Issuer hereunder; and 

(3)    the Issuer has delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel,
each stating that all conditions precedent herein provided for relating to the satisfaction and discharge of this Indenture have been complied with. 

Notwithstanding the satisfaction and discharge of this Indenture, the obligations under Sections 607 and 609 and, if money shall have
been deposited with the Trustee pursuant to clause (1)(b) of this Section 401, the obligations of the Trustee under Section 402 and the last paragraph of Section 903 shall survive such satisfaction and discharge. 

  
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 SECTION 402.    Application of Trust Money. 

Subject to the provisions of the last paragraph of Section 903, all money deposited with the Trustee pursuant to Section 401 shall be
held in trust and applied by it, in accordance with the provisions of the Securities and this Indenture, to the payment, either directly or through any Paying Agent (including the Issuer acting as its own Paying Agent) as the Trustee may determine,
to the Persons entitled thereto, of the principal (and premium, if any) and interest for whose payment such money has been deposited with the Trustee; but such money need not be segregated from other funds except to the extent required by law. 

ARTICLE FIVE 
 REMEDIES 

SECTION 501.    Events of Default. 

“Event of Default”, wherever used herein, means any one of the following events (whatever the reason for such Event of Default
and whether it shall be voluntary or involuntary or be effected by operation of law or pursuant to any judgment, decree or order of any court or any order, rule or regulation of any administrative or governmental body): 

(1)    failure to pay principal of (or premium, if any, on) any Security when due; or 

(2)    failure to pay any interest on any Security when due, continued for 30 days; or 

(3)    default in the payment of principal of (and premium, if any) and interest on Securities required to
be purchased pursuant to an Offer to Purchase pursuant to Section 907 when due and payable; or 

(4)    failure to perform or comply with the provisions of Section 701, 703, 705, or 707; or 

(5)    failure to perform any other covenant or agreement of Level 3 Parent, the Issuer or any Issuer
Restricted Subsidiary in this Indenture or in any Security (other than a covenant a default in whose performance is elsewhere in this Section specifically dealt with) continued for 90 days after written notice to the Issuer by the Trustee
or Holders of at least 30% in aggregate principal amount of the Outstanding Securities, which notice shall specify the default and state that such notice is a “Notice of Default” hereunder; or 

(6)    default under the terms of any mortgage, indenture or instrument evidencing or securing Debt for
borrowed money of Level 3 Parent, the Issuer or any Issuer Restricted Subsidiary (or the payment of which is guaranteed by Level 3 Parent, the Issuer or any Issuer Restricted Subsidiary) having an outstanding principal amount of not less
than $275,000,000 or its foreign currency equivalent at the time, individually or in the aggregate, which default results in the acceleration of the payment of such indebtedness or constitutes the failure to pay such indebtedness when due (after
expiration of any applicable grace period); or 

  
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 (7)    the rendering of a judgment or judgments against
Level 3 Parent, the Issuer or any Issuer Restricted Subsidiary in an aggregate amount in excess of $275,000,000 or its foreign currency equivalent at the time and shall not be waived, satisfied or discharged for any period of 60 consecutive
days during which a stay of enforcement shall not be in effect; or 
 (8)    any Note Guarantee of
Level 3 Parent, Level 3 LLC or any other Guarantor that is either a Significant Subsidiary or a guarantor of any Existing Notes then Outstanding, ceases to be in full force and effect (other than in accordance with the terms of such Note
Guarantee) or Level 3 Parent, Level 3 LLC or any other Guarantor that is either a Significant Subsidiary or a guarantor of any Existing Notes then Outstanding denies or disaffirms its obligations under its Note Guarantee; or 

(9)    the entry of a decree or order by a court having jurisdiction in the premises adjudging Level 3
Parent, the Issuer or any Significant Subsidiary as bankrupt or insolvent, or approving as properly filed a petition seeking reorganization, arrangement, adjustment or composition of or in respect of Level 3 Parent, the Issuer or any
Significant Subsidiary under the Federal Bankruptcy Code or any other applicable federal, state or foreign law, or appointing a receiver, liquidator, assignee, trustee, custodian or sequestrator (or other similar official) of Level 3 Parent,
the Issuer or any Significant Subsidiary or of any substantial part of its Property, or ordering the winding up or liquidation of its affairs, and the continuance of any such decree or order unstayed and in effect for a period of 60 consecutive
days; or 
 (10)    the institution by Level 3 Parent, the Issuer or any Significant Subsidiary of
proceedings to be adjudicated a bankrupt or insolvent, or the consent by it to the institution of bankruptcy or insolvency proceedings against it, or the filing by it of a petition or answer or consent seeking reorganization or relief under the
Federal Bankruptcy Code or any other applicable federal, state or foreign law, or the consent by it to the filing of any such petition or to the appointment of a receiver, liquidator, assignee, trustee, custodian or sequestrator (or other similar
official) of Level 3 Parent, the Issuer or any Significant Subsidiary or of any substantial part of its Property, or the making by it of an assignment for the benefit of creditors, or the admission by it in writing of its inability to pay its
debts generally as they become due. 
 For the avoidance of doubt, it will not be an Event of Default if Lumen fails to satisfy either or
both of the Sustainability Performance Targets by the end of 2025 or fails to provide reports with respect to its performance against the Sustainability Performance Targets, and the sole recourse of holders of the Securities in such instance shall
be the right to receive interest payments at the increased interest rate in accordance with Section 1 on the reverse of the form of Security. 

SECTION 502.    Acceleration of Maturity; Noteholder Direction; Rescission and Annulment. 

If an Event of Default (other than an Event of Default specified in Section 501(9) or 501(10) with respect to Level 3 Parent or the
Issuer) shall occur and be continuing, either the Trustee or the Holders of not less than 30% in aggregate principal amount of the Outstanding Securities may declare the principal amount of all the Securities to be due and payable immediately, by a
notice in writing to the Issuer (and to the Trustee if given by Holders), and upon any such declaration such principal amount shall become immediately due and payable; provided that a notice of Default may not be given with respect to
any 

  
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action taken, and reported publicly or to Holders, more than two years prior to such notice of Default. If an Event of Default specified in Section 501(9) or 501(10) occurs with respect to
Level 3 Parent or the Issuer, the principal amount of all the Securities shall ipso facto become immediately due and payable without any declaration or other act on the part of the Trustee or any Holder. 

Any Noteholder Direction provided by any Directing Holder must be accompanied by a Position Representation, which representation, in the case
of a Default Direction, shall be deemed repeated at all times until the resulting Event of Default is cured or otherwise ceases to exist or the Securities are accelerated. In addition, each Directing Holder must, at the time of providing a
Noteholder Direction, make a Verification Covenant. In any case in which the Holder is DTC or its nominee, any Position Representation or Verification Covenant required hereunder shall be provided by the beneficial owner of the Securities in lieu of
DTC or its nominee. 
 If, following the delivery of a Noteholder Direction, but prior to acceleration of the Securities, the Issuer
determines in good faith that there is a reasonable basis to believe a Directing Holder was, at any relevant time, in breach of its Position Representation and provides to the Trustee an Officers’ Certificate stating that the Issuer has filed
papers with or initiated litigation in a court of competent jurisdiction seeking a determination that such Directing Holder was, at such time, in breach of its Position Representation, and seeking to invalidate any Event of Default that resulted
from the applicable Noteholder Direction, the cure period with respect to such Event of Default shall be automatically stayed pending a final and non-appealable determination of a court of competent
jurisdiction on such matter. If, following the delivery of a Noteholder Direction, but prior to acceleration of the Securities, the Issuer provides to the Trustee an Officers’ Certificate stating that a Directing Holder failed to satisfy its
Verification Covenant, the cure period with respect to such Default shall be automatically stayed and the cure period with respect to any Event of Default that resulted from the applicable Noteholder Direction and any remedy shall be automatically
stayed pending satisfaction of such Verification Covenant. Any breach of the Position Representation shall result in such Holder’s participation in such Noteholder Direction being disregarded; and, if, without the participation of such Holder,
the percentage of Securities held by the remaining Holders that provided such Noteholder Direction would have been insufficient to validly provide such Noteholder Direction, such Noteholder Direction shall be void ab initio, with the effect that
such Event of Default shall be deemed never to have occurred. The Trustee shall be deemed not to have received such Noteholder Direction or any notice of such Default or Event of Default. The Trustee shall be entitled to conclusively rely without
liability on any Noteholder Direction delivered to it in accordance with this Section 502, shall have no duty to inquire as to or investigate the accuracy of any Position Representation, enforce compliance with any Verification Covenant, verify
any statements in any Officers’ Certificate delivered to it, or otherwise make calculations, investigations or determinations with respect to Derivative Instruments, Net Shorts, Long Derivative Instruments, Short Derivative Instruments or
otherwise and shall have no liability for ceasing to take any action or staying any remedy. The Trustee shall have no liability to the Issuer, any Holder or any other Person in acting in good faith on a Noteholder Direction or refraining from taking
any action in good faith with respect thereto or to determine whether any Holder has delivered a Position Representation or that such Position Representation conforms with the Indenture or any other agreement and can rely conclusively on the
Officers’ Certificate delivered by the Issuer and determinations made by a court of competent jurisdiction. 
 Notwithstanding anything
in the preceding two paragraphs to the contrary, any Noteholder Direction delivered to the Trustee during the pendency of an Event of Default specified in Sections 501(9) or 501(10) shall not require compliance with the preceding two paragraphs.


  
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 At any time after a declaration of acceleration has been made and before a judgment or decree for
payment of the money due has been obtained by the Trustee as hereinafter provided in this Article Five, the Holders of a majority in aggregate principal amount of the Outstanding Securities, by written notice to the Issuer and the Trustee, may
rescind and annul such declaration and its consequences if 
 (1)    the Issuer has paid or deposited
with the Trustee a sum sufficient to pay 
 (A)    all overdue interest on all Outstanding Securities,

 (B)    all unpaid principal of (and premium, if any, on) any Outstanding Securities which has become
due otherwise than by such declaration of acceleration, and interest on such unpaid principal at the rate borne by the Securities, 

(C)    to the extent that payment of such interest is lawful, interest on overdue interest at the rate
borne by the Securities, and 
 (D)    all sums paid or advanced by the Trustee hereunder and the
reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel; and 

(2)    all Events of Default, other than the nonpayment of amounts of principal of (and premium, if any,
on) Securities which have become due solely by such declaration of acceleration, have been cured or waived as provided in Section 513. 
 No such
rescission shall affect any subsequent default or impair any right consequent thereon. 
 SECTION 503.    Collection
of Indebtedness and Suits for Enforcement by Trustee. 
 The Issuer covenants that if 

(a)    Default is made in the payment of any interest on any Security when due, continued for 30 days,
or 
 (b)    Default is made in the payment of the principal of (or premium, if any, on) any Security
when due, 
 the Issuer will, upon demand of the Trustee, pay to the Trustee for the benefit of the Holders of such Securities the whole amount then due and
payable on such Securities for principal (and premium, if any) and interest, and interest on any overdue principal (and premium, if any) and, to the extent that payment of such interest shall be legally enforceable, upon any overdue installment of
interest, at the rate borne by the Securities, and, in addition thereto, such further amount as shall be sufficient to cover the costs and expenses of collection, including the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel. 
 If the Issuer fails to pay such amounts forthwith upon such demand, the Trustee, in its own name as
trustee of an express trust, may institute a judicial proceeding for the collection of the sums so due and unpaid, may prosecute such proceeding to judgment or final decree and may enforce the same against the Issuer or any other obligor upon the
Securities and collect the moneys adjudged or decreed to be payable in the manner provided by law out of the property of the Issuer or any other obligor upon the Securities, wherever situated. 

  
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 If an Event of Default occurs and is continuing, the Trustee may in its discretion proceed to
protect and enforce its rights and the rights of the Holders by such appropriate judicial proceedings as the Trustee shall deem necessary to protect and enforce any such rights, whether for the specific enforcement of any covenant or agreement in
this Indenture or in aid of the exercise of any power granted herein, or to enforce any other proper remedy. 
 SECTION
504.    Trustee May File Proofs of Claim. 
 In case of the pendency of any receivership, insolvency, liquidation,
bankruptcy, reorganization, arrangement, adjustment, composition or other judicial proceeding relative to the Issuer or any other obligor upon the Securities (including Level 3 Parent and any other Guarantor) or the Property of the Issuer or of
such other obligor or their creditors, the Trustee (irrespective of whether the principal of the Securities shall then be due and payable as herein expressed or by declaration or otherwise and irrespective of whether the Trustee shall have made any
demand on the Issuer for the payment of overdue principal, premium, if any, or interest) shall be entitled and empowered, by intervention in such proceeding or otherwise, 

(i)    to file and prove a claim for the whole amount of principal (and premium, if any) and interest owing
and unpaid in respect of the Securities and to file such other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for the reasonable compensation, expenses, disbursements and advances
of the Trustee and its agents and counsel) and of the Holders allowed in such judicial proceeding, and 

(ii)    to collect and receive any moneys or other property payable or deliverable on any such claims and
to distribute the same; 
 and any custodian, receiver, assignee, trustee, liquidator or sequestrator (or other similar official) in any such judicial
proceeding is hereby authorized by each Holder to make such payments to the Trustee and, in the event that the Trustee shall consent to the making of such payments directly to the Holders, to pay the Trustee any amount due it for the reasonable
compensation, expenses, disbursements and advances of the Trustee and its agents and counsel, and any other amounts due the Trustee under Section 607. 

Nothing herein contained shall be deemed to authorize the Trustee to authorize or consent to, or accept or adopt on behalf of, any Holder any
plan of reorganization, arrangement, adjustment or composition affecting the Securities or the rights of any Holder thereof, or to authorize the Trustee to vote in respect of the claim of any Holder in any such proceeding. 

SECTION 505.    Trustee May Enforce Claims Without Possession of Securities. 

All rights of action and claims under this Indenture or the Securities may be prosecuted and enforced by the Trustee without the possession of
any of the Securities or the production thereof in any proceeding relating thereto, and any such proceeding instituted by the Trustee shall be brought in its own name and as trustee of an express trust, and any recovery of judgment shall, after
provision for the payment of the reasonable compensation, expenses, disbursements and advances of the Trustee and its agents and counsel, be for the ratable benefit of the Holders of the Securities in respect of which such judgment has been
recovered. 

  
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 SECTION 506.    Application of Money Collected. 

Any money collected by the Trustee pursuant to this Article Five shall be applied in the following order, at the date or dates fixed by the
Trustee and, in case of the distribution of such money on account of principal (or premium, if any) or interest, upon presentation of the Securities and the notation thereon of the payment if only partially paid and upon surrender thereof if fully
paid: 
 FIRST: To the payment of all amounts due the Trustee and its agents under Section 607; 

SECOND: To the payment of the amounts then due and unpaid for principal of (and premium, if any) and interest on the Securities in respect of
which or for the benefit of which such money has been collected, ratably, without preference or priority of any kind, according to the amounts due and payable on such Securities for principal (and premium, if any) and interest, respectively; and

 THIRD: The balance, if any, to the Issuer. 

SECTION 507.    Limitation on Suits. 

No Holder of any Securities shall have any right to institute any proceeding with respect to this Indenture or for any other remedy hereunder,
unless 
 (1)    such Holder shall have previously given to the Trustee written notice of a continuing
Event of Default; 
 (2)    the Holders of not less than 30% in aggregate principal amount of the
Outstanding Securities shall have made written request and offered indemnity reasonably satisfactory to the Trustee to institute such proceeding as trustee; and 

(3)    the Trustee shall not have received from the Holders of a majority in aggregate principal amount of
the Outstanding Securities a direction inconsistent with such request and shall have failed to institute such proceeding within 60 days; 
 it being
understood and intended that no one or more Holders shall have any right in any manner whatsoever by virtue of, or by availing of, any provision of this Indenture to affect, disturb or prejudice the rights of any other Holders, or to obtain or to
seek to obtain priority or preference over any other Holders or to enforce any right under this Indenture, except in the manner herein provided and for the equal and ratable benefit of all the Holders. 

SECTION 508.    Unconditional Right of Holders to Receive Principal, Premium and Interest. 

Notwithstanding any other provision in this Indenture, including Section 507, the Holder of any Security shall have the right, which is
absolute and unconditional, to receive payment as provided herein (including, if applicable, Article Eleven) and in such Security of the principal of (and premium, if any) and interest on such Security on the respective Stated Maturities expressed
in such Security (or, in the case of redemption, on the Redemption Date) and to institute suit for the enforcement of any such payment, and such rights shall not be impaired without the consent of such Holder. 

  
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 SECTION 509.    Restoration of Rights and Remedies. 

If the Trustee or any Holder has instituted any proceeding to enforce any right or remedy under this Indenture and such proceeding has been
discontinued or abandoned for any reason, or has been determined adversely to the Trustee or to such Holder, then and in every such case, subject to any determination in such proceeding, the Issuer, any Guarantor, the Trustee and the Holders shall
be restored severally and respectively to their former positions hereunder and thereafter all rights and remedies of the Trustee and the Holders shall continue as though no such proceeding had been instituted. 

SECTION 510.    Rights and Remedies Cumulative. 

Except as otherwise provided with respect to the replacement or payment of mutilated, destroyed, lost or stolen Securities in Section 306,
no right or remedy herein conferred upon or reserved to the Trustee or to the Holders is intended to be exclusive of any other right or remedy, and every right and remedy shall, to the extent permitted by law, be cumulative and in addition to every
other right and remedy given hereunder or now or hereafter existing at law or in equity or otherwise. The assertion or employment of any right or remedy hereunder, or otherwise, shall not prevent the concurrent assertion or employment of any other
appropriate right or remedy. 
 SECTION 511.    Delay or Omission Not Waiver. 

Except as otherwise provided in the proviso of the first paragraph of Section 502, no delay or omission of the Trustee or of any Holder of
any Security to exercise any right or remedy accruing upon any Event of Default shall impair any such right or remedy or constitute a waiver of any such Event of Default or an acquiescence therein. Every right and remedy given by this Article Five
or by law to the Trustee or to the Holders may be exercised from time to time, and as often as may be deemed expedient, by the Trustee or by the Holders, as the case may be. 

SECTION 512.    Control by Holders. 

The Holders of a majority in aggregate principal amount of the Outstanding Securities shall have the right to direct the time, method and place
of conducting any proceeding for any remedy available to the Trustee or exercising any trust or power conferred on the Trustee; provided that 

(1)    such direction shall not be in conflict with any rule of law or with this Indenture, 

(2)    the Trustee may take any other action deemed proper by the Trustee that is not inconsistent with
such direction, and 
 (3)    the Trustee need not take any action which might involve it in personal
liability or be unjustly prejudicial to the Holders not consenting. 

  
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 SECTION 513.    Waiver of Past Defaults. 

The Holders of not less than a majority in principal amount of the Outstanding Securities may, on behalf of the Holders of all the Securities,
waive any past Default hereunder and its consequences, except a Default 
 (1)    in the payment of the
principal of (or premium, if any) or interest on any Security, or 
 (2)    in respect of a covenant or
provision hereof which under Article Eight cannot be modified or amended without the consent of the Holder of each Outstanding Security affected, or 

(3)    in respect of the covenant contained in Section 913, which under Article Eight cannot be
modified or amended without the consent of the Holders of two-thirds in principal amount of the Outstanding Securities. 

The Issuer and Level 3 Parent shall deliver to the Trustee an Officers’ Certificate stating that the requisite Holders of a majority
in principal amount of the Outstanding Securities have consented to such waiver and attaching such consents upon which, subject to Section 104, the Trustee may conclusively rely. Upon any such waiver, such default shall cease to exist, and any
Event of Default arising therefrom shall be deemed to have been cured, for every purpose of this Indenture; but no such waiver shall extend to any subsequent or other default or Event of Default or impair any right consequent thereon. 

SECTION 514.    Waiver of Stay or Extension Laws. 

The Issuer and each Guarantor covenant (to the extent that they may lawfully do so) that they shall not at any time insist upon, or plead, or
in any manner whatsoever claim or take the benefit or advantage of, any stay or extension law wherever enacted, now or at any time hereafter in force, which may affect the covenants or the performance of this Indenture; and the Issuer and each
Guarantor (to the extent that they may lawfully do so) hereby expressly waive all benefit or advantage of any such law and covenant that they shall not hinder, delay or impede the execution of any power herein granted to the Trustee, but shall
suffer and permit the execution of every such power as though no such law had been enacted. 
 SECTION
515.    Undertaking for Costs. 
 In any suit for the enforcement of any right or remedy under this Indenture or
in any suit against the Trustee for any action taken or omitted by it as a Trustee, a court in its discretion may require the filing by any party litigant in the suit of an undertaking to pay the costs of the suit, and the court in its discretion
may assess reasonable costs, including reasonable attorney’s fees and expenses, against any party litigant in the suit, having due regard to the merits and good faith of the claims or defenses made by the party litigant. This Section 515
does not apply to a suit by the Trustee or a suit by Holders of more than 10% in principal amount of the then Outstanding Securities. 

  
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 ARTICLE SIX 

THE TRUSTEE 
 SECTION
601.    Certain Duties and Responsibilities. 
 (a)    Except during the continuance of an
Event of Default, 
 (1)    the Trustee undertakes to perform such duties and only such duties as are
specifically set forth in this Indenture, and no implied covenants or obligations shall be read into this Indenture against the Trustee; and 

(2)    in the absence of bad faith on its part, the Trustee may conclusively rely, as to the truth of the
statements and the correctness of the opinions expressed therein, upon certificates or opinions furnished to the Trustee and conforming to the requirements of this Indenture; but, in the case of any such certificates or opinions which by any
provision hereof are specifically required to be furnished to the Trustee, the Trustee shall be under a duty to examine the same to determine whether or not they conform to the requirements of this Indenture (but need not confirm or investigate the
accuracy of any mathematical calculations or other facts stated therein). 
 (b)    In case an Event of Default has
occurred and is continuing, the Trustee shall exercise such of the rights and powers vested in it by this Indenture, and use the same degree of care and skill in their exercise, as a prudent person would exercise or use under the circumstances in
the conduct of such person’s own affairs. 
 (c)    No provision of this Indenture shall be construed to relieve
the Trustee from liability for its own negligent action, its own negligent failure to act or its own willful misconduct, except that 

(1)    this paragraph (c) shall not be construed to limit the effect of paragraph (a) of this
Section 601; 
 (2)    the Trustee shall not be liable for any error of judgment made in good faith
by a Responsible Officer, unless it shall be proved that the Trustee was negligent in ascertaining the pertinent facts; 

(3)    the Trustee shall not be liable with respect to any action taken or omitted to be taken by it in
good faith in accordance with the direction of the Holders of a majority in principal amount of the Outstanding Securities relating to the time, method and place of conducting any proceeding for any remedy available to the Trustee, or exercising any
trust or power conferred upon the Trustee, under this Indenture; and 
 (4)    no provision of this
Indenture shall require the Trustee to expend or risk its own funds or otherwise incur any financial liability in the performance of any of its duties hereunder, or in the exercise of any of its rights or powers, if it shall have reasonable grounds
for believing that repayment of such funds or indemnity reasonably satisfactory to it against such risk or liability is not reasonably assured to it. 

  
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 (d)    Whether or not therein expressly so provided, every provision of this
Indenture relating to the conduct or affecting the liability of or affording protection to the Trustee shall be subject to the provisions of this Section 601. 

SECTION 602.    Notice of Default. 

If a Default occurs and is continuing, the Trustee shall transmit, electronically or by first class mail to each Holder at the address set
forth in the Security Register, notice of such Default within 90 days after written notice of it is received by a Responsible Officer of the Trustee; provided, however, that, except in the case of a Default in the payment of the
principal of (or premium, if any) or interest on any Security, the Trustee shall be protected in withholding such notice if and so long as a trust committee of directors or Responsible Officers of the Trustee in good faith determines that the
withholding of such notice is in the interest of the Holders. 
 The Trustee is not required to take notice or deemed to have notice of any
Event of Default with respect to the Securities unless the Trustee shall have received written notice at its Corporate Trust Office (which notice shall reference the Securities, the Issuer and this Indenture) of such Event of Default from the Issuer
or any Holder. 
 SECTION 603.    Certain Rights of Trustee. 

Subject to Section 601: 

(1)    the Trustee may conclusively rely and shall be fully protected in acting or refraining from acting
upon any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, other evidence of indebtedness or other paper or document believed by it to be genuine and to have been
signed or presented by the proper party or parties; 
 (2)    any request or direction of the Issuer
mentioned herein shall be sufficiently evidenced by an Issuer Request or Issuer Order and any resolution of the Board of Directors may be sufficiently evidenced by a Board Resolution; 

(3)    whenever in the administration of this Indenture the Trustee shall deem it desirable that a matter
be proved or established prior to taking, suffering or omitting any action hereunder, the Trustee (unless other evidence be herein specifically prescribed) may, in the absence of bad faith on its part, receive and rely upon an Officers’
Certificate; 
 (4)    the Trustee may consult with counsel of its selection and the advice of such
counsel or any Opinion of Counsel shall be full and complete authorization and protection in respect of any action taken, suffered or omitted by it hereunder in good faith and in reliance thereon; 

(5)    the Trustee may act through counsel, agents, custodians and nominees and shall not be responsible
for the misconduct or negligence of any such person appointed with due care and in good faith; 

(6)    the Trustee shall be under no obligation to exercise any of the rights or powers vested in it by
this Indenture at the written request or direction of any of the Holders pursuant to 

  
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this Indenture, unless such Holders shall have offered to the Trustee security or indemnity reasonably satisfactory to it against the costs, expenses and liabilities which might be incurred by it
in compliance with such request or direction; 
 (7)    the Trustee shall not be bound to make any
investigation into the facts or matters stated in any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, other evidence of indebtedness or other paper or document, but
the Trustee, in its discretion, may make such further inquiry or investigation into such facts or matters as it may see fit, and, if the Trustee shall determine to make such further inquiry or investigation, it shall be entitled to examine the
books, records and premises of the Issuer, personally or by agent or attorney at the expense of the Issuer and shall incur no liability of any kind by reason of such inquiry or investigation; 

(8)    the Trustee shall not be liable for any action taken, suffered or omitted by it in good faith and
believed by it to be authorized or within the discretion or rights or powers conferred upon it by this Indenture; 

(9)    the rights, privileges, protections, immunities and benefits given to the Trustee, including,
without limitation, its right to be indemnified, are extended to, and shall be enforceable by, the Trustee in each of its capacities hereunder, and each agent, custodian and other Person employed to act hereunder; 

(10)    the Trustee may request that Level 3 Parent or the Issuer deliver an Officers’
Certificate in substantially the form of Exhibit A hereto setting forth the names of individuals and/or titles of officers authorized at such time to take specified actions pursuant to this Indenture, which Officers’ Certificate may be signed
by any person authorized to sign an Officers’ Certificate, including any person specified as so authorized in any such certificate previously delivered and not superseded; 

(11)    in no event shall the Trustee be responsible or liable for special, indirect, punitive or
consequential loss or damage of any kind whatsoever (including, but not limited to, loss of profit) irrespective of whether the Trustee has been advised of the likelihood of such loss or damage and regardless of the form of action; 

(12)    the Trustee shall not be deemed to have notice of any Default or Event of Default unless written
notice of any event which is in fact such a default is received by the Trustee at the Corporate Trust Office of the Trustee and such notice references the Securities and this Indenture; and 

(13)    in no event shall the Trustee be charged with knowledge of or monitoring whether the Sustainability
Performance Targets have been met. With respect to the rate at which the Securities will bear interest, the Trustee shall be fully protected in conclusively relying upon an Officers’ Certificate delivered to the Trustee by the Issuer on or
prior to the Notification Deadline, which sets out the interest rate for the Securities. 

  
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 SECTION 604.    Trustee Not Responsible for Recitals or Issuance of
Securities. 
 The recitals contained herein and in the Securities, except for the Trustee’s certificates of authentication, shall
be taken as the statements of Level 3 Parent or the Issuer, as applicable, and the Trustee assumes no responsibility for their correctness. The Trustee makes no representations as to the validity or sufficiency of this Indenture or of the
Securities, except that the Trustee represents that it is duly authorized to execute and deliver this Indenture, authenticate the Securities and perform its obligations hereunder. The Trustee shall not be accountable for the use or application by
the Issuer of Securities or the proceeds thereof. 
 SECTION 605.    May Hold Securities. 

The Trustee, any Paying Agent, any Security Registrar or any other agent of Level 3 Parent, the Issuer or of the Trustee, in its
individual or any other capacity, may become the owner or pledgee of Securities, and may otherwise deal with Level 3 Parent and the Issuer with the same rights it would have if it were not any Trustee, Paying Agent, Security Registrar or such
other agent. However, the Trustee must comply with Section 608. 
 SECTION 606.    Money Held in Trust. 

Money held by the Trustee in trust hereunder need not be segregated from other funds except to the extent required by law. The Trustee shall be
under no liability for interest on any money received by it hereunder except as otherwise agreed in writing with the Issuer. 
 SECTION
607.    Compensation and Reimbursement. 
 The Issuer agrees: 

(1)    to pay to the Trustee from time to time such compensation as shall be agreed in writing between the
Issuer and the Trustee for all services rendered by it hereunder (which compensation shall not be limited by any provision of law in regard to the compensation of a trustee of an express trust); 

(2)    except as otherwise expressly provided herein, to reimburse the Trustee upon its request for all
reasonable expenses, disbursements and advances incurred or made by the Trustee in accordance with any provision of this Indenture (including the reasonable compensation and the expenses and disbursements of its agents and counsel), except any such
expense, disbursement or advance as shall be determined to have been caused by the Trustee’s own negligence, willful misconduct or bad faith; and 

(3)    to fully indemnify each of the Trustee and any predecessor trustee and its directors, officers,
employees and agents for, and to hold them harmless against, any and all loss, liability, damage, claim or expense including taxes (other than taxes based on the income of the Trustee) incurred without negligence, willful misconduct or bad faith on
the part of any of them, arising out of or in connection with the acceptance or administration of this trust, including the costs and expenses of defending itself or themselves against any claim (whether asserted by the Issuer, a Guarantor, a Holder
or any other Person) or liability in connection with the exercise or performance of any of its or their powers or duties hereunder. 

  
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 The obligations of the Issuer under this Section 607 to compensate the Trustee, to pay or
reimburse the Trustee for expenses, disbursements and advances and to indemnify and hold harmless the Trustee shall constitute additional indebtedness hereunder. As security for the performance of such obligations of the Issuer, the Trustee shall
have a claim prior to the Securities upon all property and funds held or collected by the Trustee as such, except funds held in trust for the payment of principal of (and premium, if any) or interest on particular Securities. 

When the Trustee incurs expenses or renders services in connection with an Event of Default specified in Section 501(9) or (10), the
expenses (including the reasonable charges and expenses of its counsel) of and the compensation for such services are intended to constitute expenses of administration under any applicable federal, state or foreign bankruptcy, insolvency or other
similar law. 
 The provisions of this Section 607 shall survive the termination of this Indenture or the earlier resignation or
removal of the Trustee. 
 SECTION 608.    Corporate Trustee Required; Eligibility; Conflicting Interests. 

(a)    There shall be at all times a Trustee hereunder which shall have a combined capital and surplus of at least
$50,000,000. If such Person publishes reports of condition at least annually, pursuant to law or to the requirements of federal, state, territorial or District of Columbia supervising or examining authority, then, for the purposes of this
Section 608, the combined capital and surplus of such Person shall be deemed to be its combined capital and surplus as set forth in its most recent report of condition so published. If at any time a Responsible Officer of the Trustee shall have
actual knowledge that the Trustee ceases to be eligible in accordance with the provisions of this Section 608, it shall resign immediately in the manner and with the effect hereinafter specified in this Article Six. 

(b)    The Trustee shall be permitted to engage in transactions with Level 3 Parent or its Subsidiaries;
provided, however, that if the Trustee acquires any conflicting interest, the Trustee must (i) eliminate such conflict within 90 days of acquiring such conflicting interest, (ii) apply to the Commission for permission to
continue acting as Trustee or (iii) resign. 
 SECTION 609.    Resignation and Removal; Appointment of
Successor. 
 (a)    No resignation or removal of the Trustee and no appointment of a successor Trustee pursuant to
this Article Six shall become effective until the acceptance of appointment by the successor Trustee in accordance with the applicable requirements of Section 610. 

(b)    The Trustee may resign at any time by giving written notice thereof to the Issuer. If the instrument of acceptance
by a successor Trustee required by Section 610 shall not have been delivered to the Trustee within 30 days after the giving of such notice of resignation, the resigning Trustee may petition, at the expense of the Issuer, any court of
competent jurisdiction for the appointment of a successor Trustee. 
 (c)    The Trustee may be removed at any time by
Act of the Holders of not less than a majority in aggregate principal amount of the Outstanding Securities, delivered to the Trustee and to the Issuer. If the instrument of acceptance by a successor Trustee required by Section 610 shall not
have been delivered to the Trustee within 30 days after the giving of such notice of removal, the Trustee designated for removal may petition, at the expense of the Issuer, any court of competent jurisdiction for the appointment of a successor
Trustee. 

  
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 (d)    If at any time: 

(1)    the Trustee shall cease to be eligible under Section 608 and shall fail to resign after written
request therefor by the Issuer or by any Holder who has been a bona fide Holder of a Security for at least six months, or 

(2)    the Trustee shall become incapable of acting or shall be adjudged a bankrupt or insolvent or a
receiver of the Trustee or of its property shall be appointed or any public officer shall take charge or control of the Trustee or of its property or affairs for the purpose of rehabilitation, conservation or liquidation, 

then, in any such case, (i) the Issuer, by a Board Resolution (or by a resolution of a duly authorized committee of the Board of Directors of the
Issuer), may remove the Trustee or (ii) the Holders of at least 10% in aggregate principal amount of the then Outstanding Securities who have been bona fide Holders of a Security for at least six months may, on behalf of themselves and all
others similarly situated, petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee. 

(e)    If the Trustee shall resign, be removed or become incapable of acting, or if a vacancy shall occur in the office of
Trustee for any cause, the Issuer, by a Board Resolution, shall promptly appoint a successor Trustee. If the Issuer does not promptly appoint a successor Trustee after such resignation, removal or incapability, or the occurrence of such vacancy, a
successor Trustee shall be appointed by Act of the Holders of a majority in aggregate principal amount of the Outstanding Securities delivered to the Issuer and the retiring Trustee. In either case, the successor Trustee so appointed shall,
forthwith upon its acceptance of such appointment, become the successor Trustee and supersede the successor Trustee appointed by the Issuer. If no successor Trustee shall have been so appointed by the Issuer or the Holders and accepted appointment
in the manner hereinafter provided, any Holder who has been a bona fide Holder of a Security for at least six months may, on behalf of himself and all others similarly situated, petition any court of competent jurisdiction for the appointment of a
successor Trustee. 
 (f)    The Issuer shall give notice of each resignation and each removal of the Trustee and each
appointment of a successor Trustee to the Holders of Securities in the manner provided for in Section 106. Each notice shall include the name of the successor Trustee and the address of its Corporate Trust Office. 

(g)    The retiring Trustee shall not be liable for any of the acts or omissions of any successor Trustee appointed
hereunder. 
 SECTION 610.    Acceptance of Appointment by Successor. 

Every successor Trustee appointed hereunder shall execute, acknowledge and deliver to the Issuer and to the retiring Trustee an instrument
accepting such appointment, and thereupon the resignation or removal of the retiring Trustee shall become effective and such successor Trustee, without any further act, deed or conveyance, shall become vested with all the rights, powers, trusts and
duties of the retiring Trustee; but, on request of the Issuer or the successor Trustee, such retiring Trustee shall, upon payment of its charges hereunder, execute and deliver an instrument transferring to such successor Trustee all the


  
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rights, powers and trusts of the retiring Trustee and shall duly assign, transfer and deliver to such successor Trustee all property and money held by such retiring Trustee hereunder. Upon
request of any such successor Trustee, the Issuer shall execute any and all instruments for more fully and certainly vesting in and confirming to such successor Trustee all such rights, powers and trusts. 

No successor Trustee shall accept its appointment unless at the time of such acceptance such successor Trustee shall be qualified and eligible
under this Article Six. 
 SECTION 611.    Merger, Conversion, Consolidation or Succession to Business. 

Any Person into which the Trustee may be merged or converted or with which it may be consolidated, or any Person resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any Person succeeding to all or substantially all of the corporate trust business of the Trustee, shall be the successor of the Trustee hereunder; provided that such Person
shall be otherwise qualified and eligible under this Article Six, without the execution or filing of any paper or any further act on the part of any of the parties hereto. In case any Securities shall have been authenticated, but not delivered, by
the Trustee then in office, any successor by merger, conversion, consolidation or transfer of assets to such authenticating Trustee may adopt such authentication and deliver the Securities so authenticated with the same effect as if such successor
Trustee had itself authenticated such Securities. In case at that time any of the Securities shall not have been authenticated, any successor Trustee may authenticate such Securities either in the name of any predecessor hereunder or in the name of
the successor Trustee. In all such cases such certificates shall have the full force and effect which this Indenture provides that the certificate of authentication of the Trustee shall have; provided, however, that the right to adopt
the certificate of authentication of any predecessor Trustee or to authenticate Securities in the name of any predecessor Trustee shall apply only to its successor or successors by merger, conversion, consolidation or transfer of assets. 

ARTICLE SEVEN 
 CONSOLIDATION,
MERGER, CONVEYANCE, TRANSFER OR LEASE 
 SECTION 701.    Limitations on Certain Consolidation Transactions by
Level 3 Parent. 
 (a)    Level 3 Parent shall not, in a single transaction or a series of related
transactions, (i) consolidate with or merge into any other Person or Persons or permit any other Person to consolidate with or merge into Level 3 Parent or (ii) directly or indirectly, transfer, sell, lease, convey or otherwise
dispose of all or substantially all its assets to any other Person or Persons unless: 
 (1)    in a
transaction in which Level 3 Parent is not the surviving Person or in which Level 3 Parent transfers, sells, leases, conveys or otherwise disposes of all or substantially all of its assets to any other Person, the resulting surviving or
transferee Person (the “successor entity”) is organized under the laws of the United States of America or any State thereof or the District of Columbia and shall expressly assume, by a supplemental indenture executed and delivered
to the Trustee in form satisfactory to the Trustee, all of Level 3 Parent’s obligations under this Indenture and the Level 3 Parent Guarantee; 

  
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 (2)    in the case of a transfer, sale, lease, conveyance or
other disposition of all or substantially all of the assets of Level 3 Parent, such assets shall have been transferred as an entirety or virtually as an entirety to one Person and such Person shall have complied with all the provisions of this
paragraph; and 
 (3)    Level 3 Parent and the Issuer have delivered to the Trustee an Officers’
Certificate and Opinion of Counsel stating that such consolidation, merger, transfer, sale, lease, conveyance or other disposition and, if a supplemental indenture is required in connection with such transaction, such supplemental indenture,
complies with this Article and that all conditions precedent to such transaction herein have been complied with. 

(b)    Level 3 Parent shall at all times own at least 66 2/3% of the issued and outstanding Capital Stock of the Issuer. 
 SECTION
702.    Successor Level 3 Parent Substituted. 
 Upon any consolidation of Level 3 Parent
with or merger of Level 3 Parent with or into any other Person or any transfer, sale, lease, conveyance or other disposition of all or substantially all the assets of Level 3 Parent to any Person or Persons in accordance with
Section 701, the successor Person formed by such consolidation or into which Level 3 Parent is merged or to which such transfer, sale, lease, conveyance or other disposition is made shall succeed to, and be substituted for, and may
exercise every right and power of, Level 3 Parent under this Indenture with the same effect as if such successor Person had been named as Level 3 Parent herein, and the predecessor Level 3 Parent (which term shall for this purpose
mean the Person named as “Level 3 Parent” in the first paragraph of this Indenture or any successor Person which shall have become such in the manner described in Section 701), except in the case of a lease,
shall be released from all its obligations and covenants under this Indenture and the Securities and may be dissolved and liquidated. 

SECTION 703.    Limitations on Certain Consolidation Transactions by Issuer. 

(a)    The Issuer shall not, in a single transaction or a series of related transactions, (i) consolidate or merge
into Level 3 Parent or permit Level 3 Parent to consolidate with or merge into the Issuer or (ii) directly or indirectly, transfer, sell, lease, convey or otherwise dispose of all or substantially all its assets to Level 3
Parent. Additionally, the Issuer shall not, in a single transaction or a series of related transactions, (i) consolidate with or merge into any other Person or Persons or permit any other Person to consolidate with or merge into the Issuer or
(ii) directly or indirectly, transfer, sell, lease, convey or otherwise dispose of all or substantially all its assets to any other Person or Persons (other than to an Issuer Restricted Subsidiary that is or becomes a Guarantor and an Offering
Proceeds Note Guarantor at the time of such transfer, sale, lease, conveyance or disposition or to Level 3 Parent so long as Level 3 Parent is a Guarantor), unless: 

(1)    in a transaction in which the Issuer is not the surviving Person or in which the Issuer transfers,
sells, leases, conveys or otherwise disposes of all or substantially all of its assets to any other Person, the successor entity is organized under the laws of the United States of America or any State thereof or the District of Columbia and shall
expressly assume, by a supplemental indenture executed and delivered to the Trustee in form satisfactory to the Trustee, all of the Issuer’s obligations under this Indenture; 

  
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 (2)    immediately before and after giving effect to such
transaction and treating any Debt which becomes an obligation of the Issuer (or the successor entity) or an Issuer Restricted Subsidiary as a result of such transaction as having been Incurred by the Issuer or such Issuer Restricted Subsidiary at
the time of the transaction, no Default or Event of Default shall have occurred and be continuing; 

(3)    immediately after giving effect to such transaction and treating any Debt which becomes an
obligation of the Issuer (or the successor entity) or an Issuer Restricted Subsidiary as a result of such transaction as having been Incurred by the Issuer or such Issuer Restricted Subsidiary at the time of the transaction, the Issuer (or the
successor entity) could Incur at least $1.00 of additional Debt pursuant to paragraph (a) of Section 908 (or the ratio tested thereunder would be no higher than immediately prior to giving effect to such transaction); 

(4)    if, as a result of any such transaction, Property of the Issuer (or the successor entity) or any
Issuer Restricted Subsidiary would become subject to a Lien prohibited by the provisions of Section 910, the Issuer or the successor entity to the Issuer shall have secured the Securities as required by said covenant; 

(5)    in the case of a transfer, sale, lease, conveyance or other disposition of all or substantially all
of the assets of the Issuer, such assets shall have been transferred as an entirety or virtually as an entirety to one Person and such Person shall have complied with all the provisions of this paragraph; and 

(6)    Level 3 Parent and the Issuer have delivered to the Trustee an Officers’ Certificate and an
Opinion of Counsel, each in form and substance reasonably satisfactory to the Trustee, stating that such consolidation, merger, transfer, sale, lease, conveyance or other disposition and, if a supplemental indenture is required in connection with
such transaction, such supplemental indenture, complies with this Article and that all conditions precedent to such transaction herein have been complied with. 

(b)    The Issuer shall at all times own all the issued and outstanding Capital Stock of Level 3 LLC. 

SECTION 704.    Successor Issuer Substituted. 

Upon any consolidation of the Issuer with or merger of the Issuer with or into any other Person or any transfer, sale, lease, conveyance or
other disposition of all or substantially all the assets of the Issuer to any Person or Persons in accordance with Section 703, the successor Person formed by such consolidation or into which the Issuer is merged or to which such transfer,
sale, lease, conveyance or other disposition is made shall succeed to, and be substituted for, and may exercise every right and power of, the Issuer under this Indenture with the same effect as if such successor Person had been named as the Issuer
herein, and the predecessor Issuer (which term shall for this purpose mean the Person named as the “Issuer” in the first paragraph of this Indenture or any successor Person which shall have become such in the manner described in
Section 703), except in the case of a lease, shall be released from all its obligations and covenants under this Indenture and the Securities and may be dissolved and liquidated. 

  
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 SECTION 705.    Limitations on Certain Consolidation Transactions by
Guarantor (other than Level 3 Parent).  
 A Guarantor (other than Level 3 Parent) shall not, in a single
transaction or a series of related transactions, (i) consolidate with or merge into any other Person or Persons (other than, with respect to a Guarantor that is an Issuer Restricted Subsidiary, the Issuer or another Guarantor that is an Issuer
Restricted Subsidiary) or permit any other Person (other than, with respect to a Guarantor that is an Issuer Restricted Subsidiary, another Guarantor that is an Issuer Restricted Subsidiary) to consolidate with or merge into such Guarantor or
(ii) except to another Guarantor, directly or indirectly, transfer, sell, lease, convey or otherwise dispose of all or substantially all its assets to any other Person or Persons (other than, with respect to a Guarantor that is an Issuer
Restricted Subsidiary, the Issuer or another Guarantor that is an Issuer Restricted Subsidiary), unless: 

(1)    immediately before and after giving effect to such transaction and treating any Debt which becomes
an obligation of such Guarantor as a result of such transaction as having been Incurred by such Guarantor at the time of the transaction, no Default or Event of Default shall have occurred and be continuing; 

(2)    in a transaction in which such Guarantor is not the surviving Person or in which such Guarantor
transfers, sells, leases, conveys or otherwise disposes of all or substantially all of its assets to any other Person, the resulting surviving or transferee Person is organized under the laws of the United States of America or any State thereof or
the District of Columbia and shall expressly assume, by a supplemental indenture executed and delivered to the Trustee in form satisfactory to the Trustee, all of such Guarantor’s obligations under this Indenture and its Note Guarantee; and

 (3)    Level 3 Parent and the Issuer have delivered to the Trustee an Officers’ Certificate and
an Opinion of Counsel, each in form and substance reasonably satisfactory to the Trustee, stating that such consolidation, merger, transfer, sale, lease, conveyance or other disposition and, if a supplemental indenture is required in connection with
such transaction, such supplemental indenture, complies with this Article and that all conditions precedent herein provided for relating to such transaction have been complied with. 

SECTION 706.    Successor Guarantor Substituted. 

Upon any consolidation of a Guarantor with or merger of a Guarantor with or into any other Person or any transfer, sale, lease, conveyance or
other disposition of all or substantially all the assets of a Guarantor to any Person or Persons in accordance with Section 705, the successor Person formed by such consolidation or into which such Guarantor is merged or to which such transfer,
sale, lease, conveyance or other disposition is made shall succeed to, and be substituted for, and may exercise every right and power of, such Guarantor under this Indenture with the same effect as if such successor Person had been named as a
Guarantor herein, and the predecessor Guarantor (which term shall for this purpose mean the Person named as the “New Guarantor” in the first paragraph of the applicable supplemental indenture or any successor Person which shall have become
such in the manner described in Section 705), except in the case of a lease, shall be released from all its obligations and covenants under its Note Guarantee and the Securities and may be dissolved and liquidated. 

  
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 SECTION 707.    Limitations on Certain Consolidation Transactions by
Offering Proceeds Note Guarantor. 
 An Offering Proceeds Note Guarantor shall not, in a single transaction or a series of related
transactions, (i) consolidate with or merge into any other Person or Persons (other than, with respect to an Offering Proceeds Note Guarantor that is an Issuer Restricted Subsidiary, the Issuer or another Offering Proceeds Note Guarantor that
is an Issuer Restricted Subsidiary) or permit any other Person (other than, with respect to an Offering Proceeds Note Guarantor that is an Issuer Restricted Subsidiary, another Offering Proceeds Note Guarantor that is an Issuer Restricted
Subsidiary) to consolidate with or merge into such Offering Proceeds Note Guarantor or (ii) except to another Offering Proceeds Note Guarantor, directly or indirectly, transfer, sell, lease, convey or otherwise dispose of all or substantially
all its assets to any other Person or Persons (other than, with respect to an Offering Proceeds Note Guarantor that is an Issuer Restricted Subsidiary, the Issuer or another Offering Proceeds Note Guarantor that is an Issuer Restricted Subsidiary),
unless: 
 (1)    immediately before and after giving effect to such transaction and treating any Debt
which becomes an obligation of such Offering Proceeds Note Guarantor as a result of such transaction as having been Incurred by such Offering Proceeds Note Guarantor at the time of the transaction, no Default or Event of Default shall have occurred
and be continuing; 
 (2)    in a transaction in which such Offering Proceeds Note Guarantor is not the
surviving Person or in which such Offering Proceeds Note Guarantor transfers, sells, leases, conveys or otherwise disposes of all or substantially all of its assets to any other Person, the resulting surviving or transferee Person is organized under
the laws of the United States of America or any State thereof or the District of Columbia and shall expressly assume all of such Offering Proceeds Note Guarantor’s obligations under the Offering Proceeds Note Guarantee and any subordination
agreement between the Issuer and such Offering Proceeds Note Guarantor relating to the Offering Proceeds Note; and 

(3)    Level 3 Parent and the Issuer have delivered to the Trustee an Officers’ Certificate and an
Opinion of Counsel, each in form and substance reasonably satisfactory to the Trustee, stating that such consolidation, merger, transfer, sale, lease, conveyance or other disposition and, if a supplemental indenture is required in connection with
such transaction, such supplemental indenture, complies with this Article and that all conditions precedent to such transaction herein have been complied with. 

ARTICLE EIGHT 
 SUPPLEMENTAL
INDENTURES 
 SECTION 801.    Supplemental Indentures Without Consent of Holders. 

The Issuer, the Guarantors and the Trustee may, at any time and from time to time, without notice to or consent of any Holders of Securities,
enter into one or more indentures supplemental hereto: 
 (1)    to evidence the succession of another
Person to the Issuer, Level 3 Parent or any other Guarantor and the assumption by such successor of the covenants of the Issuer, Level 3 Parent or such other Guarantor, respectively, herein, in the Securities and in the applicable Note
Guarantee, as applicable; or 

  
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 (2)    to add to the covenants of Level 3 Parent, the
Issuer or any of their respective Subsidiaries, for the benefit of the Holders, or to surrender any right or power conferred upon Level 3 Parent, the Issuer or any other Guarantor hereby; or 

(3)    to add any additional Events of Default; or 

(4)    to provide for uncertificated Securities in addition to or in place of certificated Securities; or

 (5)    to evidence and provide for the acceptance of appointment hereunder of a successor Trustee
pursuant to the requirements of Section 610; or 
 (6)    to secure the Securities; or 

(7)    to comply with the Securities Act (including Regulation S promulgated thereunder); or 

(8)    to add additional Note Guarantees or to release any Guarantors from Note Guarantees as provided by
the terms of this Indenture; or 
 (9)    as set forth in Section 1208; or 

(10)    to (a) cure any ambiguity, mistake, omission, defect, inconsistency, or obvious error herein,
or (b) correct or supplement any provision herein which may be inconsistent with any other provision herein, or to add any other provision with respect to matters or questions arising under this Indenture; provided, with respect to the
foregoing clause (10)(b), such actions shall not adversely affect the interests of the Holders in any material respect; or 

(11)    to conform this Indenture or the Securities to any provision of the “Description of the
Notes” of the Offering Memorandum to the extent such provision is intended to be a verbatim recitation thereof. 
 SECTION
802.    Supplemental Indentures With Consent of Holders. 
 With the consent of the Holders of not less than a
majority in principal amount of the Outstanding Securities, by Act of such Holders delivered to the Issuer and the Trustee, the Issuer, the Guarantors and the Trustee may enter into one or more indentures supplemental hereto for the purpose of
adding any provisions to or changing in any manner or eliminating any of the provisions of this Indenture or waiving or otherwise modifying in any manner the rights of the Holders, including the waiver of certain past defaults under this Indenture
pursuant to Section 513; provided, however, that no such supplemental indenture shall, without the consent of the Holder of each Outstanding Security (or, in the case of clause (9) below,
two-thirds in principal amount of the Outstanding Securities) affected thereby: 

(1)    change the Stated Maturity of the principal of, or any installment of interest on, any Security, or
reduce the principal amount thereof or the interest thereon (including by amending 

  
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any of the definitions relevant to the determination of the interest rate applicable to any Security) that would be due and payable upon the Stated Maturity thereof, or change the place of
payment where, or the coin or currency in which, any Security or any premium or interest thereon is payable, or impair the contractual right to institute suit for the enforcement of any such payment on or after the Stated Maturity thereof; or 

(2)    modify any provision of Section 508 or Section 513; or 

(3)    subordinate in right of payment, or otherwise subordinate, the Securities or any Note Guarantee to
any other Debt (other than as set forth in Section 1208); or 
 (4)    except as otherwise required
herein, release all or substantially all of the security interest that may have been granted in favor of the Holders of the Securities with respect to any assets that also secure any Existing Notes then outstanding; or 

(5)    reduce the premium payable upon the redemption of any Security or change the time at which any
Security may be redeemed, as described in Appendix A or Exhibit 1 thereto; or 
 (6)    reduce the
premium payable upon a Change of Control Triggering Event or, at any time after a Change of Control Triggering Event has occurred, change the time at which the Offer to Purchase relating thereto must be made or at which the Securities must be
repurchased pursuant to such Offer to Purchase; or 
 (7)    make any change in any Note Guarantee of a
Guarantor that is either a Significant Subsidiary or is a guarantor of any Existing Notes then outstanding that would adversely affect the interests of the Holders of the Securities in a manner inconsistent with any changes made in respect of the
guarantees of the Existing Notes or otherwise in any material respect (other than as set forth in Section 1208); 

(8)    modify any provision of this Section 802 (except to increase any percentage set forth herein);
or 
 (9)    (A) modify or amend Section 913, (B) except as otherwise required by this Indenture,
release all or substantially all of the security interests that may have been granted in favor of the Holders of the Securities, or (C) make any change in any Note Guarantee of a Guarantor that is a Significant Subsidiary that would adversely
affect the interests of the Holders of the Securities in any material respect (other than as set forth in Section 1208). 
 It shall
not be necessary for any Act of Holders under this Section 802 to approve the particular form of any proposed supplemental indenture, but it shall be sufficient if such Act shall approve the substance thereof. 

SECTION 803.    Execution of Supplemental Indentures. 

In executing, or accepting the additional trusts created by, any supplemental indenture permitted by this Article Eight or the modifications
thereby of the trusts created by this Indenture, the Trustee shall receive, and shall be fully protected in relying upon, an Opinion of Counsel and an Officers’ Certificate stating that the execution of such supplemental indenture is authorized
or permitted by this Indenture and 

  
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that all conditions precedent to the execution of such supplemental indenture have been fulfilled. The Trustee may, but shall not be obligated to, enter into any such supplemental indenture which
affects the Trustee’s own rights, duties or immunities under this Indenture or otherwise. 
 SECTION
804.    Effect of Supplemental Indentures. 
 Upon the execution of any supplemental indenture under this Article
Eight, this Indenture shall be modified in accordance therewith, and such supplemental indenture shall form a part of this Indenture for all purposes; and every Holder of Securities theretofore or thereafter authenticated and delivered hereunder
shall be bound thereby. 
 SECTION 805.    Reference in Securities to Supplemental Indentures. 

Securities authenticated and delivered after the execution of any supplemental indenture pursuant to this Article Eight may bear a notation in
form approved by the Trustee and the Issuer as to any matter provided for in such supplemental indenture. If the Issuer and the Trustee shall so determine, new Securities so modified as to conform, in the opinion of the Trustee and the Issuer, to
any such supplemental indenture may be prepared and executed by the Issuer and authenticated and delivered by the Trustee in exchange for Outstanding Securities. 

SECTION 806.    Notice of Supplemental Indentures. 

Promptly after the execution by the Issuer, the Guarantors and the Trustee of any supplemental indenture pursuant to this Article Eight, the
Issuer shall give notice thereof to the Holders of each Outstanding Security affected, in the manner provided for in Section 106, setting forth in general terms the substance of such supplemental indenture. 

ARTICLE NINE 
 COVENANTS 

SECTION 901.    Payment of Principal, Premium, if Any, and Interest.  

The Issuer covenants and agrees for the benefit of the Holders that it shall duly and punctually pay the principal of (and premium, if any) and
interest on the Securities in accordance with the terms of the Securities and this Indenture. 
 SECTION
902.    Maintenance of Office or Agency. 
 The Issuer shall maintain in the City of New York an office or
agency where Securities may be presented or surrendered for payment, where Securities may be surrendered for registration of transfer or exchange and where notices and demands to or upon the Issuer in respect of the Securities and this Indenture may
be served. An affiliate of the Trustee, The Bank of New York Mellon at 240 Greenwich St., New York, New York 10286, shall be such office or agency of the Issuer, unless the Issuer shall designate and maintain some other office or agency for one or
more of such purposes. The Issuer shall give prompt written notice to the Trustee of any change in the location of any such office or agency. If at any time the Issuer shall fail to maintain any such required office or agency or shall fail to
furnish the 

  
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Trustee with the address thereof, such presentations, surrenders, notices and demands may be made or served at such affiliate’s office, and the Issuer hereby appoints the Trustee as its
agent to receive all such presentations, surrenders, notices and demands. 
 The Issuer may also from time to time designate one or more
other offices or agencies (in or outside of the City of New York) where the Securities may be presented or surrendered for any or all such purposes and may from time to time rescind any such designation; provided, however, that no
such designation or rescission shall in any manner relieve the Issuer of its obligation to maintain an office or agency in the City of New York for such purposes. The Issuer shall give prompt written notice to the Trustee of any such
designation or rescission and any change in the location of any such other office or agency. 
 SECTION 903.    Money
for Security Payments to Be Held in Trust.  
 If the Issuer shall at any time act as its own Paying Agent, it shall, on or before
each due date of the principal of (or premium, if any) or interest on any of the Securities, segregate and hold in trust for the benefit of the Persons entitled thereto a sum sufficient to pay the principal of (or premium, if any) or interest so
becoming due until such sums shall be paid to such Persons or otherwise disposed of as herein provided and shall promptly notify the Trustee of its action or failure so to act. 

Whenever the Issuer shall have one or more Paying Agents for the Securities, it shall, on or before each due date of the principal of (and
premium, if any) or interest on any Securities, deposit with a Paying Agent a sum sufficient to pay the principal (and premium, if any) or interest so becoming due, such sum to be held in trust for the benefit of the Persons entitled to such
principal, premium or interest, and (unless such Paying Agent is the Trustee) the Issuer shall promptly notify the Trustee of such action or any failure so to act. 

The Issuer shall cause each Paying Agent (other than the Trustee) to execute and deliver to the Trustee an instrument in which such Paying
Agent shall agree with the Trustee, subject to the provisions of this Section 903, that such Paying Agent shall: 

(1)    hold all sums held by it for the payment of the principal of, premium, if any, or interest on
Securities in trust for the benefit of the Persons entitled thereto until such sums shall be paid to such Persons or otherwise disposed of as herein provided; 

(2)    give the Trustee notice of any default by the Issuer (or any other obligor upon the Securities) in
the making of any payment of principal, premium, if any, or interest; 
 (3)    at any time during the
continuance of any such default, upon the written request of the Trustee, forthwith pay to the Trustee all sums so held in trust by such Paying Agent; and 

(4)    indemnify the Trustee and its officers, directors, employees and agents against any loss, cost or
liability caused by, or incurred as a result of, such Paying Agent’s acts or omissions. 
 The Issuer may at any time, for the purpose
of obtaining the satisfaction and discharge of this Indenture or for any other purpose, pay, or by Issuer Order direct any Paying Agent to pay, to the Trustee all sums held in trust by the Issuer or such Paying Agent, such sums to be held by the
Trustee upon the same trusts as those upon which such sums were held by the Issuer or such Paying Agent; and, upon such payment by any Paying Agent to the Trustee, such Paying Agent shall be released from all further liability with respect to such
sums. 

  
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 Any money deposited with the Trustee or any Paying Agent, or then held by the Issuer, in trust
for the payment of the principal of, premium, if any, or interest on any Security and remaining unclaimed for two years after such principal, premium or interest has become due and payable shall be paid to the Issuer on Issuer Request or (if then
held by the Issuer) shall be discharged from such trust; and the Holder of such Security shall thereafter, as an unsecured general creditor, look only to the Issuer for payment thereof, and all liability of the Trustee or such Paying Agent with
respect to such trust money, and all liability of the Issuer as trustee thereof, shall thereupon cease; provided, however, that the Trustee or such Paying Agent, before being required to make any such repayment, shall at the expense of
the Issuer cause to be published once, in a newspaper published in the English language, customarily published on each Business Day and of general circulation in the Borough of Manhattan, the City of New York, notice that such money remains
unclaimed and that, after a date specified therein, which shall not be less than 30 days from the date of such publication, any unclaimed balance of such money then remaining will be repaid to the Issuer. 

SECTION 904.    Existence. 

Subject to Article Seven, Level 3 Parent and the Issuer shall do or cause to be done all things necessary to preserve and keep in full
force and effect the existence, rights (charter and statutory) and franchises of Level 3 Parent, the Issuer and each Issuer Restricted Subsidiary; provided, however, that Level 3 Parent and the Issuer shall not be required to
preserve, with respect to Level 3 Parent or the Issuer, respectively, any such right or franchise or, with respect to any such Issuer Restricted Subsidiary (subject to all the other covenants in this Indenture), any such existence, right or
franchise, if the Board of Directors shall determine that the preservation thereof is no longer desirable in the conduct of the business of Level 3 Parent and its Subsidiaries taken as a whole or the Issuer and its Subsidiaries taken as a
whole, respectively. 
 SECTION 905.    Reports. 

So long as any Securities are outstanding (unless defeased in a legal defeasance), Level 3 Parent shall have its annual financial
statements audited, and its interim financial statements reviewed, by a nationally recognized firm of independent accountants and shall furnish to the Trustee and the Holders of Securities, all quarterly and annual financial statements in the form
incorporated by reference in the Offering Memorandum prepared in accordance with generally accepted accounting principles that would be required to be contained in a filing with the Commission on Forms 10-Q
and 10-K if Level 3 Parent was required to file those Forms (but in no event any other items required in such Forms), together with a corresponding “Management’s Discussion and Analysis of
Financial Condition and Results of Operations” and, with respect to the annual information only, a report on the annual financial statements by Level 3 Parent’s certified independent accountant. Notwithstanding the foregoing, such
reports shall not be required to (a) comply with any segment reporting requirements (whether pursuant to generally accepted accounting principles or Regulation S-X) in greater detail than is provided or
incorporated by reference in the Offering Memorandum, (b) present beneficial ownership information; provided, however, that Level 3 Parent shall provide guarantor summary financial data substantially consistent with the data
disclosed or incorporated by reference in the Offering Memorandum or (c) provide separate financial statements or other information contemplated by Rule 13-01 or Rule
13-02 of Regulation S-X. Any reports shall be provided within the time frames required by the Commission for companies required to file such


  
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reports on a non-accelerated basis. To the extent that Level 3 Parent does not file such information with the Commission, Level 3 Parent shall
distribute such information and such reports (as well as the details regarding the conference call described below) electronically to the Trustee and either electronically or by posting such information on a password-protected website (which may be non-public, require a confidentiality acknowledgment and be maintained by Level 3 Parent or its designee) for the benefit of (a) any Holder of the Securities who provides its email address to Level 3
Parent, (b) to any beneficial owner of the Securities, who provides its email address to Level 3 Parent or its designee and certifies that it is a beneficial owner of Securities, (c) to any prospective investor who provides its email
address to Level 3 Parent or its designee and certifies that it is a QIB, or (d) any securities analyst providing an analysis of investment in the Securities who provides its email address to Level 3 Parent or its designee and other
information reasonably requested by Level 3 Parent and represents to the reasonable satisfaction of Level 3 Parent that (1) it is a bona fide securities analyst providing an analysis of investment in the Securities, (2) it will
not use the information in violation of applicable securities laws or regulations, (3) it will keep such provided information confidential and will not communicate the information to any Person, (4) it will not use such information in any
manner intended to compete with the business of Level 3 Parent or the Lumen Credit Group and (5) neither it nor its Affiliates is a Person that is principally engaged in a similar business or derives a significant portion of its revenues
from operating or owning a similar business to that of Level 3 Parent or the Lumen Credit Group; provided that Level 3 Parent may deny access to any competitively-sensitive information otherwise to be provided pursuant to this
Section 905 to the extent that Level 3 Parent determines in good faith that the provision of such information to such Person would be competitively harmful to Level 3 Parent or the Lumen Credit Group. Unless Level 3 Parent or
Lumen is subject to the reporting requirements of the Exchange Act, Level 3 Parent shall also hold a quarterly conference call for the Holders of the Securities to review such financial information (which access may be limited in the manner
described in this paragraph). The conference call will not be later than ten Business Days from the time that Level 3 Parent distributes the financial information as set forth above. 

For so long as any of the Securities remain outstanding, Level 3 Parent shall furnish to the Holders of the Securities and to any
prospective investor that certifies that it is a QIB, upon written request, the information required to be delivered pursuant to Rule 144A(d)(4) promulgated under the Securities Act. 

In the event that any direct or indirect parent of Level 3 Parent becomes a Guarantor or
co-obligor of the Securities, Level 3 Parent may satisfy its obligations under this Section 905 with respect to financial information relating to Level 3 Parent by furnishing financial
information relating to such parent. 
 Notwithstanding the foregoing, Level 3 Parent shall be deemed to have furnished such financial
statements and reports referred to above to the Trustee and the Holders if Level 3 Parent or any direct or indirect parent of Level 3 Parent has filed such reports with the Commission via the EDGAR filing system (or any successor thereto)
and such reports are publicly available. 
 Delivery of such reports, information and documents to the Trustee is for informational purposes
only and the Trustee’s receipt of such shall not constitute actual or constructive notice of any information contained therein or determinable from information contained therein, including the Issuer’s compliance with any of its covenants
hereunder (as to which the Trustee is entitled to rely exclusively on Officers’ Certificates). 

  
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 SECTION 906.    Statement by Officers as to Default.  

(a)    The Issuer shall deliver to the Trustee, on the date of delivery of each annual report to be delivered pursuant to
Section 905 commencing with the annual report for the fiscal year ended December 31, 2020, a brief certificate from the principal executive officer, principal financial officer or principal accounting officer as to his or her knowledge of
the Issuer’s compliance during the period covered by such report with all conditions and covenants under this Indenture. If the signer has knowledge of any noncompliance that occurred during such period, the certificate shall describe its
status and what action the Issuer has taken or is taking or proposes to take with respect thereto. For purposes of this Section 906(a), such compliance shall be determined without regard to any period of grace or requirement of notice under
this Indenture. 
 (b)    When any Default has occurred and is continuing under this Indenture, or if the trustee for or
the holder of any other evidence of Debt of the Issuer or any Issuer Restricted Subsidiary gives any notice or takes any other action with respect to a claimed default (other than with respect to Debt in the principal amount of less than
$275,000,000 or its foreign currency equivalent at the time), the Issuer shall, within 30 days of such occurrence, notice or other action, deliver to the Trustee by registered or certified mail or by facsimile transmission an Officers’
Certificate specifying such event, notice or other action, its status and what action the Issuer is taking or proposes to take with respect thereto. 

SECTION 907.    Change of Control Triggering Event. 

(a)    Upon the occurrence of a Change of Control Triggering Event, each Holder shall have the right to require that the
Issuer repurchase such Holder’s Securities in whole or in part in integral multiples of $1,000, in accordance with the procedures set forth in this Section 907 and this Indenture. 

(b)    Within 30 days following the occurrence of both a Change of Control and a Rating Decline with respect to the
Securities (a “Change of Control Triggering Event”), or, at the Issuer’s option, prior to any Change of Control, but after the public announcement thereof, the Issuer will be required to make an Offer to Purchase all
Outstanding Securities, unless the Issuer has issued a notice to redeem all of the Securities as provided in Article Ten of this Indenture, at a price in cash equal to 101% of the principal amount of the Securities on the Purchase Date, plus accrued
and unpaid interest (if any) to such Purchase Date (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date). If delivered prior to the date of consummation of the Change of
Control, the notice of such Offer to Purchase shall state that the Offer to Purchase is conditioned on the Change of Control Triggering Event occurring on or prior to the payment date specified in such notice and may include other related
conditions; provided, however, that no such condition shall relieve the Issuer from its repurchase obligation if a Change of Control Triggering Event in fact occurs. 

(c)    The Issuer and the Trustee shall perform their respective obligations for the Offer to Purchase as specified in the
Offer. Prior to the Purchase Date, the Issuer shall (i) accept for payment Securities or portions thereof tendered pursuant to the Offer, (ii) irrevocably deposit with the Paying Agent (or, if the Issuer is acting as its own Paying Agent,
segregate and hold in trust as provided in Section 903) money sufficient to pay the Purchase Price of all Securities or portions thereof so accepted (provided that such deposit may be made no later than 11:00 A.M. New York City time on the
Purchase Date if the Issuer elects) and (iii) deliver or cause to be delivered to the Trustee all Securities so accepted together with an Officers’ Certificate stating the Securities or portions thereof accepted for payment by the Issuer.
The 

  
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Paying Agent shall promptly mail or deliver to Holders of Securities so accepted payment in an amount equal to the Purchase Price, and the Trustee shall promptly authenticate and mail or deliver
to such Holders a new Security or Securities equal in principal amount to any unpurchased portion of the Security surrendered as requested by the Holder. Any Security not accepted for payment shall be promptly mailed or delivered by the Issuer to
the Holder thereof. In the event that the aggregate Purchase Price is less than the amount delivered by the Issuer to the Trustee or the Paying Agent, the Trustee or the Paying Agent, as the case may be, shall deliver the excess to the Issuer
immediately after the Purchase Date. 
 (d)    A “Change of Control” means the occurrence of any of the
following events: 
 (i)    if any “person” or “group” (as such terms
are used in Sections 13(d) and 14(d) of the Exchange Act or any successor provisions to either of the foregoing), including any group acting for the purpose of acquiring, holding, voting or disposing of securities within the meaning of Rule 13d-5(b)(1) under the Exchange Act, other than any one or more of the Permitted Holders, becomes the “beneficial owner” (as defined in Rule 13d-3
under the Exchange Act) directly or indirectly, of 50% or more of the total voting power of the Voting Stock of Level 3 Parent; or 

(ii)    the sale, transfer, assignment, lease, conveyance or other disposition, directly or indirectly, of
all or substantially all the assets of Level 3 Parent, the Issuer and the Issuer Restricted Subsidiaries considered as a whole (other than a disposition of such assets as an entirety or virtually as an entirety to the Issuer, a Wholly Owned
Restricted Subsidiary of the Issuer, Level 3 Parent or one or more Permitted Holders) shall have occurred; or 

(iii)    the shareholders of Level 3 Parent or the Issuer shall have approved any plan of liquidation
or dissolution of Level 3 Parent or the Issuer, respectively. 
 Notwithstanding the preceding or any provision of Rule 13d-3 or 13d-5 under the Exchange Act, for purposes of this Indenture (i) a person or group shall not be deemed to beneficially own Voting Stock (x) subject to a
stock or asset purchase agreement, merger agreement, option agreement, warrant agreement or similar agreement (or voting or option or similar agreement related thereto) until the consummation of the acquisition of the Voting Stock in connection with
the transactions contemplated by such agreement or (y) as a result of veto or approval rights in any joint venture agreement, shareholder agreement or other similar agreement, (ii) if any group includes one or more Permitted Holders, the
issued and outstanding Voting Stock of Level 3 Parent owned, directly or indirectly, by any Permitted Holders that are part of such group shall not be treated as being beneficially owned by such group or any other member of such group for
purposes of determining whether a Change of Control has occurred and (iii) a person or group shall not be deemed to beneficially own the Voting Stock of another person as a result of its ownership of Voting Stock or other securities of such
other person’s parent entity (or related contractual rights) unless it owns more than 50% of the total voting power of the Voting Stock entitled to vote for the election of directors of such parent. 

(e)    The Issuer shall not be required to make an Offer to Purchase upon a Change of Control Triggering Event if a third
party, with the prior written consent of the Issuer, makes the Offer to Purchase in the manner, at the times and otherwise in compliance with the requirements set forth in this Indenture applicable to an Offer to Purchase made by the Issuer and
purchases all Securities validly tendered and not withdrawn under such Offer to Purchase. 

  
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 (f)    In the event that the Issuer makes an Offer to Purchase the
Securities, the Issuer shall comply with any applicable securities laws and regulations, including any applicable requirements of Section 14(e) of, and Rule 14e-1 under, the Exchange Act. To the extent
that the provisions of any securities laws or regulations conflict with provisions of this Section, the Issuer shall comply with the applicable securities laws and regulations and shall not be deemed to have breached its obligations under this
Section by virtue thereof. 
 (g)    Notwithstanding anything to the contrary herein, so long as any of the
Existing Notes are outstanding, if a Change of Control Triggering Event (as defined in the applicable indenture) has occurred under any of the indentures governing such Existing Notes, a Change of Control Triggering Event with respect to the
Securities shall also be deemed to have occurred. 
 SECTION 908.    Limitation on Debt. 

(a)    The Issuer shall not, and shall not permit any Issuer Restricted Subsidiary to, directly or indirectly, Incur any
Debt; provided, however, that (i) the Issuer or (ii) any Issuer Restricted Subsidiary that is a Guarantor and an Offering Proceeds Note Guarantor may incur any Debt if, after giving pro forma effect to such Incurrence and the
receipt and application of the net proceeds thereof, no Default or Event of Default would occur as a consequence of such Incurrence or be continuing following such Incurrence and the Issuer Debt Ratio would be less than 5.75 to 1.0. 

(b)    Notwithstanding the foregoing limitation, the Issuer or any Issuer Restricted Subsidiary may Incur any and all of
the following (each of which shall be given independent effect): 
 (i)    Debt of the Issuer or any
Issuer Restricted Subsidiary under the Securities issued on the Issue Date, any Note Guarantee in respect of the Securities issued on the Issue Date, any Offering Proceeds Note issued in connection with the Securities issued on the Issue Date or any
Offering Proceeds Note Guarantee in respect of the Offering Proceeds Note; 
 (ii)    Debt of the Issuer
or any Issuer Restricted Subsidiary under Credit Facilities in an aggregate principal amount outstanding or available (together with the amount of all refinancing Debt outstanding or available pursuant to clause (vi) below in respect of Debt
previously Incurred pursuant to this clause (ii) (other than any Additional Refinancing Amount)) at any one time not to exceed the greater of (x) $5.011 billion and (y) 4.0 times Pro Forma Consolidated Cash Flow Available for Fixed Charges of
the Issuer and the Issuer Restricted Subsidiaries for the four full fiscal quarters immediately preceding the Incurrence of such Debt for which the consolidated financial statements required to be delivered under Section 905 are available; 

(iii)    Debt of the Issuer or any Issuer Restricted Subsidiary outstanding on the Measurement Date; 

(iv)    Debt owed by (A) the Issuer to any Issuer Restricted Subsidiary, (B) any Issuer
Restricted Subsidiary to the Issuer or any other Issuer Restricted Subsidiary, provided that in each case of clause (A) and (B), (x) upon the transfer, conveyance or other disposition by such Issuer Restricted Subsidiary or the Issuer of
any Debt so permitted to a Person other than the Issuer or another Issuer Restricted Subsidiary or (y) if for any reason such Issuer Restricted Subsidiary ceases to be an Issuer Restricted Subsidiary, the provisions of clause (A) or clause
(B), as applicable, shall no longer be applicable to such Debt and such Debt shall be deemed to have been 

  
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Incurred by the issuer thereof at the time of such transfer, conveyance or other disposition or when such Issuer Restricted Subsidiary ceases to be an Issuer Restricted Subsidiary, (C) the
Issuer or any Issuer Restricted Subsidiary to Level 3 Parent in an aggregate principal amount, in the case of this clause (C), not in excess of the greater of (x) $500 million and (y) 1.0 times Pro Forma Consolidated Cash Flow Available
for Fixed Charges of the Issuer and the Issuer Restricted Subsidiaries for the four full fiscal quarters immediately preceding the Incurrence of such Debt for which the consolidated financial statements required to be delivered under
Section 905 are available at any time outstanding; provided, however, that Level 3 Parent is a Guarantor; or (D) the Issuer or any Issuer Restricted Subsidiary to any member of the Lumen Credit Group in an aggregate
principal amount, in the case of this clause (D), not in excess of the greater of (x) $500 million and (y) 1.0 times Pro Forma Consolidated Cash Flow Available for Fixed Charges of the Issuer and the Issuer Restricted Subsidiaries for the four
full fiscal quarters immediately preceding the Incurrence of such Debt for which the consolidated financial statements required to be delivered under this Indenture are available at any time outstanding; provided that, in the case of clauses
(C) and (D) above, with respect to any such Debt of the Issuer, any Guarantor that is an Issuer Restricted Subsidiary or any Offering Proceeds Note Guarantor that is an Issuer Restricted Subsidiary, the payment obligation with respect to such
Debt is expressly subordinated in any bankruptcy, liquidation or winding up proceeding of the obligor to the prior payment in full in cash of all obligations with respect to the Securities or the Offering Proceeds Note Guarantee of such Offering
Proceeds Note Guarantor, respectively, which subordination may be effected by such obligor becoming a party to the Parent Intercompany Note Subordination Agreement in the manner provided in Exhibit C; 

(v)    Debt Incurred by a Person prior to the time (A) such Person became an Issuer Restricted
Subsidiary, (B) such Person merges into or consolidates with an Issuer Restricted Subsidiary or (C) an Issuer Restricted Subsidiary merges into or consolidates with such Person (in a transaction in which such Person becomes an Issuer
Restricted Subsidiary), and Debt Incurred to finance any such transaction; provided, however, that after giving effect to the Incurrence of any Debt pursuant to this clause (v), either (1) the Issuer could Incur at least $1.00 of
additional Debt pursuant to paragraph (a) above computed using “6.0 to 1.0” rather than “5.75 to 1.0” as it appears therein or (2) the ratio computed pursuant to paragraph (a) above would be no higher than before
giving effect to the Incurrence of such Debt; 
 (vi)    Debt of the Issuer or any Issuer Restricted
Subsidiary Incurred to renew, extend, refinance, defease, repay, prepay, repurchase, redeem, retire, exchange or refund (each, a “refinancing”) Debt of the Issuer or any Issuer Restricted Subsidiary Incurred pursuant to paragraph
(a) above or clause (i), (ii), (iii), (v), (ix), (x) or (xi) of this paragraph (b) or this clause (vi), in an aggregate principal amount (or if issued at a discount, the then-Accreted Value) not to exceed the aggregate principal
amount (or if issued at a discount, the then-Accreted Value) of and accrued interest on the Debt so refinanced plus any Additional Refinancing Amount; provided, however, that (A) if the Person that originally Incurred the Debt to
be refinanced became, or would have been required to become if not already, a Guarantor or an Offering Proceeds Note Guarantor as a result of the Incurrence of the Debt being refinanced in accordance with this covenant, (1) the Person that
Incurs the refinancing Debt pursuant to this clause (vi) (if not the Issuer) shall be a Guarantor or an Offering Proceeds Note Guarantor, as applicable, and (2) if the Debt to be refinanced is subordinated to the Offering Proceeds Note
Guarantee of such Offering Proceeds Note Guarantor, the refinancing Debt shall be subordinated to the same extent to the Offering 

  
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Proceeds Note Guarantee of the Offering Proceeds Note Guarantor Incurring such refinancing Debt, (B) the refinancing Debt of the Issuer or any Guarantor shall not be senior in right of
payment to the Debt that is being refinanced and (C) in the case of any refinancing of Debt Incurred pursuant to paragraph (a) above or clause (i), (v), (ix), (x) or (xi) or, if such Debt previously refinanced Debt Incurred pursuant
to any such clause, this clause (vi), the refinancing Debt by its terms, or by the terms of any agreement or instrument pursuant to which such Debt is issued, (x) does not provide for payments of principal of such Debt at stated maturity or by
way of a sinking fund applicable thereto or by way of any mandatory redemption, defeasance, retirement or repurchase thereof by the Issuer or any Issuer Restricted Subsidiary (including any redemption, retirement or repurchase which is contingent
upon events or circumstances, but excluding any retirement required by virtue of the acceleration of any payment with respect to such Debt upon any event of default thereunder), in each case prior to the earlier of the time the same are required by
the terms of the Debt being refinanced and the maturity date of the Securities and (y) does not permit redemption or other retirement (including pursuant to an offer to purchase made by the Issuer or an Issuer Restricted Subsidiary) of such
Debt at the option of the holder thereof prior to the earlier of the time the same are required by the terms of the Debt being refinanced and the maturity date of the Securities, other than, in the case of clause (x) or (y), (1) any such
payment, redemption or other retirement (including pursuant to an offer to purchase made by the Issuer) which is conditioned upon a change of control or upon an asset sale and (2) any Debt in an aggregate principal amount not in excess of the
Maturity Limitation Excluded Amount; 
 (vii)    Debt of the Issuer or any Issuer Restricted Subsidiary
(A) in respect of performance, surety or appeal bonds, Guarantees, letters of credit, indemnity or reimbursement obligations Incurred or provided in the ordinary course of business securing the performance of contractual, franchise, lease,
self-insurance workers’ compensation, health, disability or other employee benefits, property, casualty or liability insurance or license obligations and not in connection with the Incurrence of Debt, (B) in respect of customary agreements
providing for indemnification, adjustment of purchase price after closing, or similar obligations, or from Guarantees or letters of credit, surety bonds or performance bonds securing any such obligations of the Issuer or any Issuer Restricted
Subsidiary pursuant to such agreements, Incurred in connection with the disposition of any business, assets or Issuer Restricted Subsidiary (other than Guarantees of Debt Incurred by any Person acquiring all or any portion of such business, assets
or Issuer Restricted Subsidiary for the purpose of financing such acquisition) and in an aggregate principal amount not to exceed the gross proceeds actually received by the Issuer or any Issuer Restricted Subsidiary in connection with such
disposition, (C) consisting of the financing of insurance premiums in the ordinary course of business, (D) consisting of take-or-pay obligations contained in
supply arrangements, in each case, in the ordinary course of business, (E) arising from the honoring by a bank or other financial institution of a check, draft or similar instrument drawn against insufficient funds in the ordinary course;
provided that such Debt is extinguished promptly upon the Issuer or such Issuer Restricted Subsidiary’s obtaining knowledge of its occurrence, (F) letters of credit, bank guarantees, warehouse receipts or similar instruments issued
in the ordinary course of business or (G) deferred compensation to employees, consultants or independent contractors in the ordinary course of business; 

(viii)    Debt of the Issuer or any Issuer Restricted Subsidiary consisting of Permitted Hedging Agreements
and Cash Management Agreements in the ordinary course of business; 

  
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 (ix)    (1) Debt of any Foreign Restricted Subsidiary that is
an Issuer Restricted Subsidiary or (2) Debt incurred on behalf of, or representing Guarantees of Debt of, Joint Ventures of the Issuer or any Issuer Restricted Subsidiary, not otherwise permitted to be Incurred pursuant to paragraph
(a) above or clauses (i) through (viii) above or clause (x) below, which, together with any other outstanding Debt Incurred pursuant to this clause (ix) and the amount of all refinancing Debt outstanding or available pursuant to
clause (vi) above in respect of Debt previously Incurred pursuant to this clause (ix) (other than any Additional Refinancing Amount), has an aggregate principal amount not to exceed the greater of (A) $300 million and (B) 0.5 times Pro
Forma Consolidated Cash Flow Available for Fixed Charges of the Issuer and the Issuer Restricted Subsidiaries for the four full fiscal quarters immediately preceding the Incurrence of such Debt for which the consolidated financial statements
required to be delivered under Section 905 are available; 
 (x)    (a) Issue Date Purchase Money
Debt initially Incurred by the Issuer or any Issuer Restricted Subsidiary or another Person that became an Issuer Restricted Subsidiary on or before the Issue Date and (b) additional Purchase Money Debt Incurred by the Issuer or any Issuer
Restricted Subsidiary; provided that in the case of this clause (b), the amount of such Purchase Money Debt (together with the amount of all refinancing Debt outstanding or available pursuant to clause (vi) above in respect of such
Purchase Money Debt (other than any Additional Refinancing Amount)) does not exceed 100% of the cost of the construction, installation, acquisition, lease, development or improvement of the applicable assets acquired; and 

(xi)    Debt under the Existing Notes issued on or prior to the Issue Date. 

(c)    Notwithstanding any other provision of this Section 908, (A) the maximum amount of Debt the Issuer or any
Issuer Restricted Subsidiary may Incur pursuant to this Section 908 shall not be deemed to be exceeded due solely to the result of fluctuations in the exchange rates of currencies and (B) accrual of interest, accretion or amortization of
original issue discount, the payment of interest on any Debt in the form of additional Debt with the same terms, and the payment of dividends on Disqualified Stock in the form of additional shares of the same class of Disqualified Stock shall not be
deemed to be an incurrence of Debt for purposes of this covenant. 
 (d)    For purposes of determining any particular
amount of Debt under this Section 908, (1) Guarantees, Liens or obligations with respect to letters of credit supporting Debt otherwise included in the determination of such particular amount shall not be included and (2) any Liens granted
for the benefit of the Securities pursuant to the provisions of Section 910 shall not be treated as Debt. For purposes of determining compliance with this Section 908, (1) any Debt outstanding under the Existing Credit Facility will be
treated as Incurred on the Issue Date pursuant to clause (ii) of paragraph (b) of this Section 908 and (2) in the event that an item of Debt meets the criteria of more than one of the types of Debt described in the above clauses,
the Issuer, in its sole discretion, may divide and classify (and, subject to clause (1) above, may later reclassify) such item of Debt and only be required to include the amount and type of such Debt in one of such clauses. When classifying
multiple Incurrences of Debt on the same day, the Issuer may, in its sole discretion, specify the order of Incurrence of such Debt and need only give pro forma effect to the specified Incurrence (and any prior Incurrence) for purposes of classifying
such specified Incurrence. 

  
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 SECTION 909.    Limitation on Priority Debt. 

(a)    The Issuer shall not permit any Issuer Restricted Subsidiary that is a Domestic Restricted Subsidiary but is not a
Guarantor and an Offering Proceeds Note Guarantor to, directly or indirectly, Incur any Debt; provided, however, that any Issuer Restricted Subsidiary that is a Domestic Restricted Subsidiary of the Issuer but is not a
Guarantor and an Offering Proceeds Note Guarantor may Incur any Debt if, after giving pro forma effect to such Incurrence and the receipt and application of the net proceeds thereof, no Default or Event of Default would occur as a consequence of
such Incurrence or be continuing following such Incurrence and the aggregate amount of Priority Debt would not exceed the Priority Debt Cap. 

(b)    Notwithstanding the foregoing limitation, an Issuer Restricted Subsidiary that is a Domestic Restricted Subsidiary
but is not a Guarantor and an Offering Proceeds Note Guarantor may Incur any and all of the following (each of which shall be given independent effect), if it would be permitted to Incur such Debt pursuant to the following provisions of
Section 908 without being or becoming a Guarantor: 
 (i)    without duplication, Debt permitted to
be Incurred pursuant to clauses (i), (ii), (iii), (iv), (v) (but only to the extent not incurred in anticipation of such Person becoming an Issuer Restricted Subsidiary or such merger or consolidation), (vii), (viii), (ix)(2), (x) and (xi) of
paragraph (b) under Section 908; and 
 (ii)    without duplication, Debt permitted to be
Incurred pursuant to clause (vi) of paragraph (b) under Section 908, but limited, in the case of refinancing Debt of clause (v) of paragraph (b) under Section 908, to Debt not incurred in anticipation of such Person
becoming an Issuer Restricted Subsidiary or such merger or consolidation. 
 (c)    Notwithstanding any other provision
of this Section 909, (A) the maximum amount of Debt the Domestic Restricted Subsidiaries of the Issuer may Incur pursuant to this Section 909 shall not be deemed to be exceeded due solely to the result of fluctuations in the exchange
rates of currencies and (B) accrual of interest, accretion or amortization of original issue discount, the payment of interest on any Debt in the form of additional Debt with the same terms, and the payment of dividends on Disqualified Stock in
the form of additional shares of the same class of Disqualified Stock shall not be deemed to be an incurrence of Debt for purposes of this covenant. 

(d)    For purposes of determining any particular amount of Debt under this Section 909, (1) Guarantees, Liens
or obligations with respect to letters of credit supporting Debt otherwise included in the determination of such particular amount shall not be included and (2) any Liens granted for the benefit of the Securities pursuant to the provisions of
Section 910 shall not be treated as Debt. In the event that an item of Debt meets the criteria of more than one of the types of Debt described in the above clauses, the Issuer, in its sole discretion, may divide and classify (and may later
reclassify) such item of Debt and only be required to include the amount and type of such Debt in one of such clauses. When classifying multiple Incurrences of Debt on the same day, the Issuer may, in its sole discretion, specify the order of
Incurrence of such Debt and need only give pro forma effect to the specified Incurrence (and any prior Incurrence) for purposes of classifying such specified Incurrence. 

  
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 (e)    Notwithstanding anything to the contrary herein, the provisions of
this Section 909 shall continue to apply after Section 908 has been terminated in accordance with Section 914. 
 SECTION
910.    Limitation on Liens. 
 (a)    The Issuer shall not, and shall not permit any Issuer
Restricted Subsidiary to, directly or indirectly, Incur or suffer to exist any Lien on or with respect to any Property now owned or acquired after the Issue Date to secure any Debt for borrowed money without making, or causing such Issuer Restricted
Subsidiary to make, effective provision for securing the Securities (x) equally and ratably with such Debt as to such Property for so long as such Debt will be so secured or (y) in the event such Debt is Debt of the Issuer or an Issuer
Restricted Subsidiary that is a Guarantor and such Debt is subordinate in right of payment to the Securities, the Level 3 Parent Guarantee or the applicable Note Guarantee, prior to such Debt as to such Property for so long as such Debt will be
so secured. The holders of such other secured Debt may exclusively control the disposition of the property subject to the Lien. 

(b)    The foregoing restrictions shall not apply to: 

(i)    Liens existing on the Issue Date and securing Debt outstanding on the Issue Date; 

(ii)    Liens Incurred on or after the Issue Date to secure Debt, in an amount which, together with the
aggregate amount of Debt then outstanding or available under all Credit Facilities (together with all refinancing Debt, to the extent then outstanding or available pursuant to clause (vi) of paragraph (b) of Section 908 and the
corresponding provisions of Section 909 in respect of Debt previously Incurred under Credit Facilities of the Issuer and the Issuer Restricted Subsidiaries), together with the aggregate amount of other outstanding Priority Debt, does not exceed
the Priority Debt Cap; 
 (iii)    Liens in favor of the Issuer or any Issuer Restricted Subsidiary;
provided, however, that any subsequent issue or transfer of Capital Stock or other event that results in any such Issuer Restricted Subsidiary ceasing to be an Issuer Restricted Subsidiary or any subsequent transfer of the Debt secured
by any such Lien (except to an Issuer Restricted Subsidiary) shall be deemed, in each case, to constitute the Incurrence of such Lien by the issuer thereof; 

(iv)    Liens to secure Purchase Money Debt Incurred after the Issue Date and not prohibited by
Section 908 and Section 909; provided that any such Lien may not extend to any Property other than the Telecommunications/IS Assets installed, constructed, acquired, leased, developed or improved with the proceeds of such Purchase
Money Debt and any improvements or accessions thereto (it being understood that all Debt to any single lender or group of related lenders or outstanding under any single credit facility, and in any case relating to the same group or collection of
Telecommunications/IS Assets financed thereby, shall be considered a single Purchase Money Debt, whether drawn at one time or from time to time); 

(v)    Liens to secure Acquired Debt; provided that (a) such Lien attaches to the acquired
Property prior to the time of the acquisition of such Property and (b) such Lien does not extend to or cover any other Property; 

(vi)    Liens to secure Debt Incurred to refinance, in whole or in part, Debt secured by any Lien referred
to in the foregoing clauses (i), (iv) and (v) or this clause (vi) so long as such Lien 

  
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does not extend to any other Property (other than improvements and accessions to the original Property) and the principal amount of Debt so secured is not increased except as otherwise permitted
under clause (vi) of paragraph (b) of Section 908 and the corresponding provisions of Section 909; 

(vii)    Liens on Property of any Non-Telecommunications
Subsidiary; 
 (viii)    Liens granted after the Issue Date to secure the Securities, the Existing Notes
or any Additional Securities issued by the Issuer on or after the Issue Date permitted to be incurred pursuant to the terms of this Indenture; provided, however, that no Lien may be granted to secure the Existing Notes or such
Additional Securities unless a pari passu Lien on the Property subject to such Lien is concurrently granted to secure the Securities and remains in effect for so long as such Lien securing the Existing Notes or such Additional Securities
remains in effect; 
 (ix)    Liens to secure Debt incurred pursuant to clause (viii) of paragraph
(b) of Section 908 or the corresponding provisions of Section 909; 
 (x)    Liens to
secure amounts deposited into an escrow account for the benefit of the holders of the Existing Notes or any Additional Securities issued by the Issuer on or after the Issue Date permitted to be incurred pursuant to the terms of this Indenture, in
connection with the prepayment of the Existing Proceeds Notes by Level 3 LLC, or the prepayment by Level 3 LLC of any additional proceeds note issued in connection with the issuance of Additional Securities issued by the Issuer on or after
the Issue Date; 
 (xi)    Liens to secure amounts deposited into an escrow account for the benefit of
the Holders of the Securities in connection with the prepayment of the Offering Proceeds Note by Level 3 LLC; 

(xii)    Liens on the Property and Capital Stock of a Foreign Restricted Subsidiary and its Subsidiaries or
any Joint Venture Incurred on or after the Issue Date securing Debt of such Foreign Restricted Subsidiary or any Joint Venture Incurred pursuant to clause (ix) of paragraph (b) of Section 908 or, if applicable, the corresponding
provisions of Section 909; and 
 (xiii)    Permitted Liens. 

(c)    For purposes of determining compliance with this Section 910, in the event that a Lien meets the criteria of
more than one of the types of Liens described in the above clauses, the Issuer, in its sole discretion, may divide and classify (and may later reclassify) such Lien and only be required to include the amount and type of such Lien in one of such
clauses. When classifying multiple Incurrences of Liens on the same day, the Issuer may, in its sole discretion, specify the order of Incurrence of such Liens and need only give pro forma effect to the specified Incurrence (and any prior Incurrence)
for purposes of classifying such specified Incurrence. 
 SECTION 911.    Limitation on Sale and Leaseback
Transactions. 
 The Issuer shall not, and shall not permit any Issuer Restricted Subsidiary to, directly or indirectly, enter into,
assume, Guarantee or otherwise become liable with respect to any Sale and Leaseback Transaction, unless the Issuer or such Issuer Restricted Subsidiary would not be prohibited from Incurring 

  
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(a) Debt in an amount equal to the Attributable Value of the Sale and Leaseback Transaction pursuant to Section 908 and (b) a Lien pursuant to Section 910, equal in amount to
the Attributable Value of the Sale and Leaseback Transaction, without also securing the Securities. 
 SECTION
912.    Limitation on Designations of Unrestricted Subsidiaries. 
 The Issuer shall not designate
(1) Level 3 LLC as an Unrestricted Subsidiary under this Indenture or (2) any other Subsidiary of the Issuer (other than a newly created Subsidiary in which no investment has previously been made) as an “Unrestricted
Subsidiary” under this Indenture (each, a “Designation”) unless: 
  

	 	(a)	 so long as any of the Existing Notes are outstanding, at the time of such Designation, such Subsidiary of the
Issuer shall also be designated as an Unrestricted Subsidiary under each indenture governing the outstanding Existing Notes; 


  

	 	(b)	 no Default or Event of Default shall have occurred and be continuing at the time of or after giving effect to
such Designation; and 


  

	 	(c)	 (i) if Section 908 has not been terminated pursuant to Section 914, immediately prior to and after
giving effect to such Designation, the Issuer would be able to Incur $1.00 of Debt under paragraph (a) of Section 908 or (ii) following termination of Section 908 pursuant to Section 914, immediately prior to and after
giving effect to such Designation the aggregate amount of Priority Debt would not exceed the Priority Debt Cap. 


 At the
time of any Designation of any Subsidiary as an Unrestricted Subsidiary, (i) such Subsidiary shall not own any Capital Stock of the Issuer or any Issuer Restricted Subsidiary and (ii) the Issuer or any Issuer Restricted Subsidiary shall
not have guaranteed or otherwise have any direct payment obligations in respect of any Debt of such Subsidiary, except to the extent such guarantee or obligations would be released, terminated or no longer exist upon such Designation. 

Unless Designated as an Unrestricted Subsidiary, any Person that becomes a Subsidiary of the Issuer will be classified as an Issuer Restricted
Subsidiary; provided, however, that such Subsidiary shall not be designated as an Issuer Restricted Subsidiary and shall be automatically classified as an Unrestricted Subsidiary if either of the requirements set forth in
clauses (a) and (b) of the immediately following paragraph will not be satisfied immediately following such classification. Except as provided in the first sentence of this Section 912, no Issuer Restricted Subsidiary may be
redesignated as an Unrestricted Subsidiary. 
 A Designation may be revoked (a “Revocation”) by a resolution of the Board
of Directors of Level 3 Parent (or a duly authorized committee thereof) delivered to the Trustee, provided that the Issuer will not make any Revocation unless: 
  

	 	(a)	 no Default or Event of Default shall have occurred and be continuing at the time of and after giving effect to
such Revocation; and 


  

	 	(b)	 all Liens and Debt of such Unrestricted Subsidiary outstanding immediately following such Revocation would, if
Incurred at such time, have been permitted to be Incurred at such time for all purposes of this Indenture. 



  
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 All Designations and Revocations must be evidenced by an Officers’ Certificate
(i) certifying compliance with the foregoing provisions and (ii) giving the effective date of such Designation or Revocation. Upon Designation of a Restricted Subsidiary as an Unrestricted Subsidiary in compliance with this
Section 912, such Restricted Subsidiary shall, by delivery of a supplemental indenture providing for such release in form satisfactory to the Trustee, be released from any Note Guarantee previously made by such Subsidiary. 

SECTION 913.    Limitation on Actions with respect to Existing Intercompany Obligations. Without the consent of the
Holders of at least two-thirds in principal amount of the Outstanding Securities: 

(a)    the Issuer shall not forgive or waive or fail to enforce any of its rights under the Offering
Proceeds Note, any Offering Proceeds Note Guarantee, the Omnibus Offering Proceeds Note Subordination Agreement or any other agreement with Level 3 Parent or any Issuer Restricted Subsidiary to subordinate a payment obligation on any Debt to
the prior payment in full in cash of all obligations with respect to the Offering Proceeds Note or an Offering Proceeds Note Guarantee, and the Issuer and Level 3 LLC shall not amend the Offering Proceeds Note in a manner adverse to the holders
of the Securities; provided, however, that nothing in this covenant shall compel the Issuer to demand payment under the Offering Proceeds Note or any Offering Proceeds Note Guarantee except during a bankruptcy, insolvency or similar
proceeding; 
 (b)    in the event Level 3 LLC (or any successor obligor under the Offering Proceeds
Note) repays all or a portion of the Offering Proceeds Note, the Issuer must (i) deposit an amount of cash equal to the principal amount of the Offering Proceeds Note then repaid in an escrow account with an unaffiliated financial institution
for the benefit of the Holders of the Securities, and as security for the prompt and complete payment and performance when due of the Issuer’s obligations in respect of the Securities, until such time as the Securities are no longer outstanding
or such cash is used pursuant to clause (ii) or (iii) of this paragraph, (ii) redeem Securities having a principal amount equal to the principal amount of the Offering Proceeds Note then repaid in accordance with, and if at such time
permitted by, the Securities, or (iii) purchase Securities in the open market having a principal amount equal to the principal amount of the Offering Proceeds Note then repaid; provided, however, that if at any time the principal
amount of the Offering Proceeds Note is greater than the principal amount of Securities that remain outstanding, Level 3 LLC (or any successor obligor under the Offering Proceeds Note) may repay or the Issuer may forgive or waive an amount of
the Offering Proceeds Note equal to such excess without complying with clause (i), (ii) or (iii) above; 

(c)    Level 3 Parent shall not, and shall not permit any Issuer Restricted Subsidiary to, provide any Lien
on its Property for the benefit of, or any Guarantee (other than a similarly subordinated Guarantee) or other form of credit enhancement in respect of, (i) the Parent Intercompany Note or (ii) any other intercompany note required by clause
(iv) of paragraph (b) of Section 908 to be subordinated to the prior payment in full in cash of all obligations with respect to the Offering Proceeds Note or an Offering Proceeds Note Guarantee, or take any other action with the
purpose or effect of making the Parent Intercompany Note senior to or equal in right of payment with the Offering Proceeds Note; 

(d)    Level 3 Parent and Level 3 LLC shall not amend the terms of the Parent Intercompany Note in a
manner adverse in any material respect to the Holders of the Securities, 

  
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the determination of which shall be made by Level 3 Parent in good faith, except to permit subordination of Level 3 LLC’s obligations under the Parent Intercompany Note to its
obligations under a Qualified Credit Facility as described, and to the extent set forth in the Parent Intercompany Note Subordination Agreement (it being agreed that any change in the interest rate applicable to advances under the Parent
Intercompany Note shall not be deemed to be materially adverse to the holders of the Securities in any respect); 

(e)    Level 3 Parent, the Issuer and Level 3 LLC shall not amend the Omnibus Offering Proceeds Note
Subordination Agreement in a manner adverse in any material respect to the Holders of the Securities and Level 3 Parent or any Issuer Restricted Subsidiary and the Issuer shall not amend any other agreement entered into pursuant to this
Indenture between Level 3 Parent or any Issuer Restricted Subsidiary and the Issuer to subordinate a payment obligation on any Debt of Level 3 Parent or any Issuer Restricted Subsidiary to the prior payment in full in cash of all
obligations with respect to the Offering Proceeds Note or any Offering Proceeds Note Guarantee, in each case, the determination of which shall be made by Level 3 Parent in good faith, except to permit subordination of their respective
obligations under the Offering Proceeds Note or any Offering Proceeds Note Guarantee to their respective obligations under a Qualified Credit Facility as described, and to the extent set forth, in the Parent Intercompany Note Subordination
Agreement; and 
 (f)    Level 3 Parent shall not permit any Issuer Restricted Subsidiary to Guarantee
any of the Existing Unsecured Notes or the Existing Proceeds Notes unless such Issuer Restricted Subsidiary is or becomes a Guarantor of the Securities or an Offering Proceeds Note Guarantor, as applicable, and such Guarantee of the Securities or
the Offering Proceeds Note, as applicable, remains in effect for so long as the Guarantee of the Existing Unsecured Notes or the Existing Proceeds Notes remains in effect; provided, however, that this provision shall not be deemed to
be violated by the Guarantee of the Existing Notes of Level 3 LLC outstanding on the Issue Date. 
 SECTION
914.    Covenant Termination. 
 Following any date on which (i) the ratings assigned to the Securities by
two or more of the Rating Agencies are Investment Grade Ratings and (ii) no Default or Event of Default has occurred and is continuing under this Indenture, the Issuer and the Issuer Restricted Subsidiaries shall cease to be subject to the
covenants of this Indenture described in Section 908, clause (a) of Section 911 and clause (a)(3) of Section 703. 

SECTION 915.    Authorizations and Consents of Governmental Authorities. 

Each of Level 3 Parent and the Issuer will endeavor, and cause Level 3 LLC to endeavor, in good faith using commercially reasonable
efforts to cause Level 3 LLC to obtain all material (as determined in good faith by the General Counsel of Level 3 Parent) authorizations and consents of Federal and State Governmental Authorities required in order for it to Guarantee the
Securities at the earliest practicable date and to enter into a Guarantee of the Securities promptly thereafter. For purposes of this covenant, the requirement that Level 3 Parent, the Issuer or Level 3 LLC use “commercially
reasonable efforts” shall not be deemed to require it to make material payments in excess of normal fees and costs to or at the direction of Governmental Authorities or to change the manner in which it conducts its business in any respect
that the management of Level 3 Parent shall determine in good faith to be adverse or materially burdensome. 

  
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 Notwithstanding anything to the contrary contained herein (but subject to the following
paragraph), if a Person is required to become a Guarantor pursuant to this Indenture, none of the Issuer or any Subsidiary shall be required to submit any application or filing or otherwise take any action to obtain any authorization or consent of
any federal or state Governmental Authority required in order to cause such Person to become a Guarantor (and the requirement to provide such a Guarantee shall be tolled), in each case, to the extent an authorization or consent of such federal or
state Governmental Authority is determined by Lumen, Level 3 Parent or the Issuer to be sought in respect of any Material Transaction or any financing relating thereto and has not yet been obtained; provided that at the time such federal
or state Governmental Authority has approved such Material Transaction, the application, filing or other action to obtain any such authorization or consent of any federal or state Governmental Authority required in order to cause any Person to
become a Guarantor shall promptly be made. 
 Notwithstanding anything to the contrary herein, no Issuer Restricted Subsidiary shall
guarantee any of the Existing Notes, unless such Issuer Restricted Subsidiary is or becomes a Guarantor on the date on which such other guarantee is Incurred. Any such Guarantee shall be pari passu with such Issuer Restricted
Subsidiary’s guarantee of such Existing Notes and shall remain in effect for so long as such Issuer Restricted Subsidiary guarantees any Existing Notes. 

ARTICLE TEN 
 REDEMPTION OF
SECURITIES 
 SECTION 1001.    Right of Redemption. 

The Securities will be subject to redemption at the option of the Issuer, in whole or in part, at any time or from time to time, upon not less
than 10 nor more than 60 days’ prior notice, on the terms and at the Redemption Prices (expressed as percentages of principal amount) set forth in Section 5 on the reverse of the form of Security, plus accrued and unpaid interest
thereon (if any) to, but not including, the Redemption Date (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date). 

SECTION 1002.    Applicability of Article. 

This Article shall govern any redemption of the Securities pursuant to Section 1001. 

SECTION 1003.    Election to Redeem; Notice to Trustee. 

The election of the Issuer to redeem any Securities pursuant to Section 1001 shall be evidenced by a Board Resolution of the Issuer. The
Issuer shall, at least 10 days prior to the Redemption Date fixed by the Issuer (unless a shorter notice shall be satisfactory to the Trustee), notify the Trustee of such Redemption Date and of the principal amount of Securities to be redeemed
and shall deliver to the Trustee such documentation and records as shall enable the Trustee to select the Securities to be redeemed pursuant to Section 1004. Such notice shall be accompanied by an Officers’ Certificate and an Opinion of
Counsel from the Issuer to the effect that such redemption will comply with the conditions herein. 

  
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 SECTION 1004.    Selection by Trustee of Securities to Be Redeemed.

 If less than all the Securities are to be redeemed, the particular Securities to be redeemed shall be selected not more than 60 days prior
to the Redemption Date by the Trustee, from the Outstanding Securities not previously called for redemption, on a pro rata basis or by lot and which may provide for the selection for redemption of portions of the principal of Securities and, in the
case of Securities represented by a Global Security held by the Depository, in accordance with Depository procedures; provided, however, that no such partial redemption shall reduce the portion of the principal amount of a Security not
redeemed to less than $1,000. 
 The Trustee shall promptly notify the Issuer in writing of all available information (including information
obtainable from the Depository) concerning the Securities selected for redemption and, in the case of any Securities selected for partial redemption, the principal amount thereof to be redeemed. 

For all purposes of this Indenture, unless the context otherwise requires, all provisions relating to redemption of Securities shall relate,
in the case of any Security redeemed or to be redeemed only in part, to the portion of the principal amount of such Security which has been or is to be redeemed. 

SECTION 1005.    Notice of Redemption. 

Notice of redemption shall be given in the manner provided for in Section 106 not less than 10 nor more than 60 days prior to the
Redemption Date, to each Holder of Securities to be redeemed. 
 Each notice of redemption shall identify the Securities (including
“CUSIP” number(s) and the statement from Section 310) to be redeemed and shall state: 
 (1) the Redemption Date, 

(2) the Redemption Price and the amount of accrued interest to, but not including, the Redemption Date payable as provided in
Section 1007, if any, 
 (3) if relevant, any conditions to such redemption and the information required with respect thereto pursuant
to Section 5 on the reverse of the form of Security, 
 (4) if less than all Outstanding Securities are to be redeemed, the
identification (and, in the case of a partial redemption, the principal amounts) of the particular Securities to be redeemed, 
 (5) in case
any Security is to be redeemed in part only, that on and after the Redemption Date, upon surrender of such Security, the Holder will receive, without charge, a new Security or Securities of authorized denominations for the principal amount thereof
remaining unredeemed, 
 (6) that on the Redemption Date the Redemption Price (and unpaid and accrued interest, if any, to, but not
including, the Redemption Date payable as provided in Section 1007) will become due and payable upon each such Security, or the portion thereof, to be redeemed, and that, unless the Issuer defaults in making such redemption payment or the
Trustee or the Paying Agent is prohibited from making such payment, interest thereon will cease to accrue on and after said date, and 

  
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 (7) the place or places where such Securities are to be presented and surrendered for payment of
the Redemption Price and accrued interest, if any. 
 Notice of redemption of Securities to be redeemed at the election of the Issuer shall
be given by the Issuer or, at the Issuer’s request, by the Trustee in the name and at the expense of the Issuer; provided, however, in the latter case the Issuer shall give the Trustee at least ten days prior notice (or such
shorter notice as the Trustee may permit) of the date of the giving of the notice. 
 SECTION 1006.    Deposit of
Redemption Price. 
 On or prior to any Redemption Date (and if on any Redemption Date, before 11:00 A.M. New York City time, on
such date), the Issuer shall deposit with the Trustee or with a Paying Agent (or, if the Issuer is acting as its own Paying Agent, segregate and hold in trust as provided in Section 903) an amount of money sufficient to pay the Redemption Price
of, and unpaid and accrued interest (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date) on, all the Securities which are to be redeemed on that date. 

SECTION 1007.    Securities Payable on Redemption Date. 

Notice of redemption having been given as aforesaid, subject to the satisfaction or waiver of any conditions set forth in such notice of
redemption in accordance with Section 5 on the reverse of the form of Security, the Securities so to be redeemed shall, on the Redemption Date, become due and payable at the Redemption Price therein specified (together with unpaid and accrued
interest, if any, to, but not including, the Redemption Date), and from and after such date (unless the Issuer shall default in the payment of the Redemption Price and accrued interest or the Trustee or the Paying Agent shall be prohibited from
making such payment) such Securities shall cease to bear interest. Upon surrender of any such Security for redemption in accordance with said notice, such Security shall be paid by the Issuer at the Redemption Price, together with unpaid and accrued
interest, if any, to, but not including, the Redemption Date; provided, however, that installments of interest whose Stated Maturity is on or prior to the Redemption Date shall be payable to the Holders of such Securities, or one or
more Predecessor Securities, registered as such at the close of business on the relevant record dates according to their terms. 
 If any
Security called for redemption shall not be so paid upon surrender thereof for redemption, the principal (and premium, if any) shall, until paid, bear interest from the Redemption Date at the rate borne by the Securities. 

If the Issuer has given notice of redemption as provided in this Indenture and made available funds for the redemption of the Securities (or
any portion thereof) called for redemption on or prior to the Redemption Date referred to in such notice, those Securities will cease to bear interest on or after that Redemption Date and the only right of the holders of those Securities will be to
receive payment of the Redemption Price, together with any accrued and unpaid interest. 
 SECTION
1008.    Securities Redeemed in Part. 
 Any Security which is to be redeemed only in part shall be surrendered at
the office or agency of the Issuer maintained for such purpose pursuant to Section 902 (with, if the Issuer and the Trustee so require, due endorsement by, or a written instrument of transfer in form satisfactory to the Issuer and the Trustee
duly executed by, the Holder thereof or such Holder’s attorney duly authorized in writing), and 

  
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the Issuer shall execute, and the Trustee shall authenticate and deliver to the Holder of such Security without service charge, a new Security or Securities, of any authorized denomination as
requested by such Holder, in aggregate principal amount equal to and in exchange for the unredeemed portion of the principal of the Security so surrendered. 

ARTICLE ELEVEN 
 DEFEASANCE AND
COVENANT DEFEASANCE 
 SECTION 1101.    Issuer’s Option to Effect Defeasance or Covenant
Defeasance. 
 The Issuer may, at its option by Board Resolution of the Issuer, at any time, with respect to the Securities, elect to
have either Section 1102 or Section 1103 be applied to all Outstanding Securities upon compliance with the conditions set forth below in this Article Eleven. 

SECTION 1102.    Defeasance and Discharge. 

Upon the Issuer’s exercise under Section 1101 of the option applicable to this Section 1102, the Issuer and the Guarantors shall
be deemed to have been discharged from their obligations with respect to all Outstanding Securities on the date the conditions set forth in Section 1104 are satisfied (hereinafter, “defeasance”). For this purpose, such
defeasance means that the Issuer shall be deemed to have paid and discharged the entire indebtedness represented by the Outstanding Securities, which shall thereafter be deemed to be “Outstanding” only for the purposes of Section 1105
and the other Sections of this Indenture referred to in clauses (A) and (B) below, and to have satisfied all their other obligations under such Securities and this Indenture insofar as such Securities are concerned (and the Trustee, at the
expense of the Issuer, shall execute proper instruments acknowledging the same), except for the following which shall survive until otherwise terminated or discharged hereunder: (A) the Issuer’s obligations with respect to such Securities
under Section 2.3 of Appendix A and Sections 303, 306, 307, 902 and 903 and the Issuer’s rights under Section 1001, (B) rights of Holders to receive payment of principal of, premium, if any, and interest on such Securities (but
not the Purchase Price referred to under Section 907) and any rights of the Holders with respect to such amounts, (C) the rights, obligations and immunities of the Trustee under this Indenture and (D) this Article Eleven. Subject to
compliance with this Article Eleven, the Issuer may exercise its option under this Section 1102 notwithstanding the prior exercise of its option under Section 1103 with respect to the Securities. If the Issuer exercises its option under
this Section 1102, (u) each Guarantor, if any, shall be released from all its obligations under its Note Guarantee, (v) all subordination provisions contained in the Parent Intercompany Note and the Parent Intercompany Note Subordination
Agreement shall be deemed terminated as they relate to the Offering Proceeds Note and the Offering Proceeds Note Guarantees, (w) the Offering Proceeds Note may be prepaid in whole or in part, (x) no entity shall be obligated to guarantee
the Offering Proceeds Note, (y) the Offering Proceeds Note may be canceled and (z) all obligations to provide Offering Proceeds Note Guarantees shall terminate and all references in this Indenture to Offering Proceeds Note Guarantees and
Offering Proceeds Note Guarantees shall be disregarded and not be deemed to be requirements to take or omit to take any action by Level 3 Parent or any Restricted Subsidiary. 

  
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 SECTION 1103.    Covenant Defeasance. 

Upon the Issuer’s exercise under Section 1101 of the option applicable to this Section 1103, the Issuer and each Guarantor shall
be released from their obligations under any covenant contained in Sections 701(a)(2), 703(a)(3), (4) and (5), in Sections 704, 706, 905 and 915 and Sections 907 through 914 and from the operation of Sections 501(6), (7), (8), (9) and (10)
(but, in the case of Sections 501(9) and (10), with respect only to Significant Subsidiaries), with respect to the Outstanding Securities on and after the date the conditions set forth below are satisfied (hereinafter, “covenant
defeasance”), and the Securities shall thereafter be deemed not to be “Outstanding” for the purposes of any direction, waiver, consent, declaration or other Act of Holders (and the consequences of any thereof) in connection with
such provisions, but shall continue to be deemed “Outstanding” for all other purposes hereunder. For this purpose, such covenant defeasance means that, with respect to the Outstanding Securities, the Issuer and the Guarantors may omit to
comply with and shall have no liability in respect of any term, condition or limitation set forth in any such provision, whether directly or indirectly, by reason of any reference elsewhere herein to any such provision or by reason of any reference
in any such provision to any other provision herein or in any other document and such omission to comply shall not constitute a Default or an Event of Default under Section 501(3), (4), (5), (6), (7), (8), (9) or (10) (but, in the case of
Section 501(9) or (10), with respect only to Significant Subsidiaries) but, except as specified above, the remainder of this Indenture and such Securities shall be unaffected thereby. If the Issuer exercises its option under this
Section 1103, (u) each Guarantor shall be released from all its obligations under its Note Guarantee, (v) all subordination provisions contained in the Parent Intercompany Note and the Parent Intercompany Note Subordination Agreement shall
be deemed terminated as they relate to the Offering Proceeds Note and the Offering Proceeds Note Guarantees, (w) the Offering Proceeds Note may be prepaid in whole or in part, (x) no entity shall be obligated to guarantee the Offering
Proceeds Note, (y) the Offering Proceeds Note may be canceled and (z) all obligations to provide Offering Proceeds Note Guarantees shall terminate and all references in this Indenture to Offering Proceeds Note Guarantees and Offering
Proceeds Note Guarantees shall be disregarded and not be deemed to be requirements to take or omit to take any action by Level 3 Parent or any Restricted Subsidiary. 

SECTION 1104.    Conditions to Defeasance or Covenant Defeasance. 

The following shall be the conditions to application of either Section 1102 or Section 1103 to the Outstanding Securities: 

(1)    The Issuer shall irrevocably have deposited or caused to be deposited with the Trustee (or another trustee
satisfying the requirements of Section 608 who shall agree to comply with the provisions of this Article Eleven applicable to it) as trust funds in trust for the purpose of making the following payments, specifically pledged as security for,
and dedicated solely to, the benefit of the Holders of such Securities, at any time prior to the Maturity of the Securities: (A) money in an amount, or (B) Government Securities which through the payment of interest and principal will
provide, not later than one day before the due date of payment in respect of the Securities, money in an amount, or (C) a combination thereof, sufficient, in the opinion of a certified public accountant (selected by the Issuer or Level 3
Parent in its sole discretion) expressed in a written certification delivered to the Trustee, to pay and discharge the principal of (and premium, if any, on) and interest on (calculated for purposes of any interest period beginning on or after the
Interest Rate Step Up Date that has not commenced prior to such deposit at the Fully-Adjusted Subsequent Interest Rate if the Satisfaction Notification has not previously been delivered to the Trustee), the Outstanding Securities on the Stated
Maturity (or Redemption Date, if applicable) of 

  
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such principal (and premium, if any) or installment of interest; provided that the Trustee (or such other trustee) shall have been irrevocably instructed in writing to apply such money or
the proceeds of such Government Securities to said payments with respect to the Securities. Before such a deposit, the Issuer may give to the Trustee, in accordance with Section 1003, a notice of their election to redeem all of the Outstanding
Securities at a future date in accordance with Article Ten, which notice shall be irrevocable. Such irrevocable redemption notice, if given, shall be given effect in applying the foregoing. 

(2)    No Default or Event of Default with respect to the Securities shall have occurred and be continuing on the date of
such deposit or, insofar as paragraphs (9) and (10) of Section 501 are concerned with respect to Level 3 Parent and the Issuer, at any time during the period ending on the 123rd day after the date of such deposit (it being understood
that this condition shall not be deemed satisfied until the expiration of such period). 
 (3)    Such defeasance or
covenant defeasance shall not result in a breach or violation of, or constitute a default under, this Indenture or any other agreement or instrument to which the Issuer or any Guarantor is a party or by which it is bound. 

(4)    In the case of an election under Section 1102, the Issuer shall have delivered to the Trustee an Opinion of
Counsel stating that (x) the Issuer has received from, or there has been published by, the Internal Revenue Service a ruling, or (y) since the date of this Indenture, there has been a change in the applicable federal income tax law, in
either case to the effect that, and based thereon such opinion shall confirm that, the Holders of the Outstanding Securities will not recognize income, gain or loss for federal income tax purposes as a result of such defeasance and will be subject
to federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such defeasance had not occurred. 

(5)    In the case of an election under Section 1103, the Issuer shall have delivered to the Trustee an Opinion of
Counsel to the effect that the Holders of the Outstanding Securities will not recognize income, gain or loss for federal income tax purposes as a result of such covenant defeasance and will be subject to federal income tax on the same amounts, in
the same manner and at the same times as would have been the case if such covenant defeasance had not occurred. 

(6)    The Issuer shall have delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel, each
stating that all conditions precedent provided for relating to either the defeasance under Section 1102 or the covenant defeasance under Section 1103 (as the case may be) have been complied with. 

SECTION 1105.    Deposited Money and Government Securities to Be Held in Trust; Other Miscellaneous Provisions.

 Subject to the provisions of the last paragraph of Section 903, all money and Government Securities (including the proceeds thereof)
deposited with the Trustee (or other qualifying trustee, collectively for purposes of this Section 1105, the “Trustee”) pursuant to Section 1104 in respect of the Outstanding Securities shall be held in trust and applied
by the Trustee, in accordance with the provisions of such Securities and this Indenture, to the payment, either directly or through any Paying Agent (including the Issuer acting as its own Paying Agent) as the Trustee may determine, to the Holders
of such Securities of all sums due and to become due thereon in respect of principal, premium, if any, and interest, but such money need not be segregated from other funds except to the extent required by law or to the extent the Issuer or
Level 3 Parent acts as the Issuer’s Paying Agent. 

  
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 The Issuer shall pay and indemnify the Trustee and (if applicable) its officers, directors,
employees and agents against any tax, fee or other charge imposed on or assessed against the Government Securities deposited pursuant to Section 1104 or the principal and interest received in respect thereof other than any such tax, fee or
other charge which by law is for the account of the Holders of the Outstanding Securities. 
 Anything in this Article Eleven to the
contrary notwithstanding, the Trustee shall deliver or pay to the Issuer from time to time upon the Issuer’s Request any money or Government Securities held by it as provided in Section 1104 which, in the opinion of a certified public
accountant (selected by the Issuer or Level 3 Parent in its sole discretion) expressed in a written certification thereof delivered to the Trustee, are in excess of the amount thereof which would then be required to be deposited to effect an
equivalent defeasance or covenant defeasance, as applicable, in accordance with this Article Eleven. 
 SECTION
1106.    Reinstatement. 
 If the Trustee or any Paying Agent is unable to apply any money in accordance with
Section 401 or 1105 by reason of any order or judgment of any court or governmental authority enjoining, restraining or otherwise prohibiting such application, then the Issuer’s and each Guarantor’s obligations under this Indenture
and the Securities shall be revived and reinstated as though no deposit had occurred pursuant to Section 401, 1102 or 1103, as the case may be, until such time as the Trustee or Paying Agent is permitted to apply all such money in accordance
therewith; provided, however, that if the Issuer or any Guarantor makes any payment of principal of, premium, if any, or interest on any Security following the reinstatement of its obligations, the Issuer or such Guarantor shall be
subrogated to the rights of the Holders of such Securities to receive such payment from the money held by the Trustee or Paying Agent. 

ARTICLE TWELVE 
 GUARANTEES AND
OFFERING PROCEEDS NOTE GUARANTEES 
 SECTION 1201.    Guarantees. Each Guarantor hereby unconditionally
guarantees, jointly and severally, to each Holder and to the Trustee and its successors and assigns (a) the full and punctual payment of principal of (and premium, if any) and interest on the Securities when due, whether at Stated Maturity, by
acceleration, by redemption or otherwise, and all other monetary obligations of the Issuer under this Indenture and the Securities and (b) the full and punctual performance within applicable grace periods of all other obligations of the Issuer
under this Indenture and the Securities (all the foregoing being hereinafter collectively called the “Obligations”). Each Guarantor further agrees that the Obligations may be extended or renewed, in whole or in part, without notice
or further assent from such Guarantor, and that such Guarantor will remain bound under this Article Twelve notwithstanding any extension or renewal of any Obligation. 

Each Guarantor waives presentation to, demand of, payment from and protest to the Issuer of any of the Obligations and also waives notice of
protest for nonpayment. Each Guarantor waives notice of any default under the Securities or the Obligations. The obligations of each Guarantor hereunder shall not be affected by (a) the failure of any Holder or the Trustee to assert any claim
or demand or to enforce any right or remedy against the Issuer or any other Person under this Indenture, the Securities or any other 

  
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agreement or otherwise; (b) any extension or renewal of any thereof; (c) any rescission, waiver, amendment or modification of any of the terms or provisions of this Indenture, the
Securities or any other agreement; (d) the release of any security held by any Holder or the Trustee for the Obligations of any of them; (e) the failure of any Holder or the Trustee to exercise any right or remedy against any other
guarantor of the Obligations; or (f) any change in the ownership of such Guarantor. 
 Each Guarantor further agrees that its Note
Guarantee herein constitutes a guarantee of payment, performance and compliance when due (and not a guarantee of collection) and waives any right to require that any resort be had by any Holder or the Trustee to any security held for payment of the
Obligations. 
 Except as expressly set forth in Sections 705, 706, 912, 1102, 1103, 1203 and 1208, the obligations of each Guarantor
hereunder shall not be subject to any reduction, limitation, impairment or termination for any reason, including any claim of waiver, release, surrender, alteration or compromise, and shall not be subject to any defense of setoff, counterclaim,
recoupment or termination whatsoever or by reason of the invalidity, illegality or unenforceability of the Guaranteed Obligations or otherwise. Without limiting the generality of the foregoing, the obligations of each Guarantor herein shall not be
discharged or impaired or otherwise affected by the failure of any Holder or the Trustee to assert any claim or demand or to enforce any remedy under this Indenture, the Securities or any other agreement, by any waiver or modification of any terms
thereof, by any default, failure or delay, willful or otherwise, in the performance of the obligations, or by any other act or thing or omission or delay to do any other act or thing which may or might in any manner or to any extent vary the risk of
such Guarantor or would otherwise operate as a discharge of such Guarantor as a matter of law or equity. 
 Each Guarantor further agrees
that its Note Guarantee herein shall continue to be effective or be reinstated, as the case may be, if at any time payment, or any part thereof, of principal of (or premium, if any) or interest on any Obligation is rescinded or must otherwise be
restored by any Holder or the Trustee upon the bankruptcy or reorganization of the Issuer or otherwise. 
 In furtherance of the foregoing
and not in limitation of any other right which any Holder or the Trustee has at law or in equity against any Guarantor by virtue hereof, upon the failure of the Issuer to pay the principal of (or premium, if any) or interest on any Obligation when
and as the same shall become due, whether at Stated Maturity, by acceleration, by redemption or otherwise, or to perform or comply with any other Obligation, each Guarantor hereby promises to and will, upon receipt of written demand by the Trustee,
forthwith pay, or cause to be paid, in cash, to the Holders or the Trustee an amount equal to the sum of (i) the unpaid amount of such Obligations, (ii) accrued and unpaid interest on such Obligations (but only to the extent not prohibited
by law) and (iii) all other monetary Obligations of the Issuer to the Holders and the Trustee. 
 Each Guarantor agrees that it shall
not be entitled to any right of subrogation in respect of any Obligations guaranteed hereby until payment in full in cash of all Obligations. Each Guarantor further agrees that, as between it, on the one hand, and the Holders and the Trustee, on the
other hand, (x) the maturity of the Obligations guaranteed hereby may be accelerated as provided in Article Five for the purposes of such Guarantor’s Note Guarantee herein, notwithstanding any stay, injunction or other prohibition
preventing such acceleration in respect of the Obligations guaranteed hereby, and (y) in the event of any declaration of acceleration of such Obligations as provided in Article Five, such Obligations (whether or not due and payable) shall
forthwith become due and payable by such Guarantor for the purposes of this Section 1201. 

  
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 Each Guarantor also agrees to pay any and all costs and expenses (including reasonable
attorneys’ fees) incurred by the Trustee or any Holder in enforcing any rights under this Section 1201. 
 No Foreign Restricted
Subsidiary shall at any time be required to become a Guarantor. Notwithstanding anything to the contrary contained herein (but subject to the following paragraph), if a Person is required to become a Guarantor pursuant to this Indenture, none of the
Issuer or any Subsidiary shall be required to submit any application or filing or otherwise take any action to obtain any authorization or consent of any federal or state Governmental Authority required in order to cause such Person to become a
Guarantor (and the requirement to provide such a Guarantee shall be tolled), in each case, to the extent an authorization or consent of such federal or state Governmental Authority is determined by Lumen, Level 3 Parent or the Issuer to be
sought in respect of any Material Transaction or any financing relating thereto and has not yet been obtained; provided that at the time such federal or state Governmental Authority has approved such Material Transaction, the
application, filing or other action to obtain any such authorization or consent of any federal or state Governmental Authority required in order to cause any Person to become a Guarantor shall promptly be made. 

Notwithstanding anything to the contrary herein, no Issuer Restricted Subsidiary shall Guarantee any of the Existing Notes, unless such Issuer
Restricted Subsidiary is or becomes a Guarantor on the date on which such other guarantee is Incurred, which Guarantee will be pari passu with such Issuer Restricted Subsidiary’s guarantee of such Existing Notes and shall remain in
effect for so long as such Issuer Restricted Subsidiary guarantees any Existing Notes. 
 SECTION
1202.    Contribution. Each of the Issuer and any Guarantor (a “Contributing Party”) agrees that, in the event a payment shall be made by any other Guarantor under any Note Guarantee (the “Claiming
Guarantor”), the Contributing Party shall indemnify the Claiming Guarantor in an amount equal to the amount of such payment multiplied by a fraction, the numerator of which shall be the net worth of the Contributing Party on the date hereof
and the denominator of which shall be the aggregate net worth of the Issuer and all the Guarantors on the date hereof (or, in the case of any Guarantor becoming a party hereto pursuant to Section 801, the date of the supplemental indenture
executed and delivered by such Guarantor). 
 SECTION 1203.    Release of Guarantees. The Note Guarantee of a
Guarantor that is an Issuer Restricted Subsidiary shall be automatically and unconditionally released (a) in connection with any sale or other disposition of all or substantially all of the assets of that Guarantor (including by way of merger
or consolidation) to a Person that is not (either before or after giving effect to such transaction) the Issuer or an Issuer Restricted Subsidiary in compliance with all applicable provisions of this Indenture, if any, (b) in connection with
any sale of all of the Capital Stock of a Guarantor that is an Issuer Restricted Subsidiary to a Person that is not (either before or after giving effect to such transaction) the Issuer or an Issuer Restricted Subsidiary in compliance with all
applicable provisions of this Indenture, if any, (c) if the Issuer properly designates any Issuer Restricted Subsidiary that is a Guarantor as an Unrestricted Subsidiary pursuant to Section 912, (d) if the Issuer exercises the legal
defeasance option or covenant defeasance option in accordance with Article Eleven, (e) if such Guarantor is not a guarantor under any of the Existing Notes and is not otherwise required to Guarantee the Securities under this Indenture in
accordance with Section 1201 or (f) if such Guarantee was originally Incurred to permit such Guarantor to Incur Debt not otherwise permitted pursuant to Section 909 and the Debt so Incurred (and any permitted refinancing Debt thereof)
has been repaid or discharged (provided that, after giving effect to such release, such Guarantor does not have any outstanding Debt that would violate Section 909 if such outstanding Debt would have been Incurred following the release of such
Note Guarantee). 

  
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 SECTION 1204.    Successors and Assigns. This Article Twelve shall be
binding upon each Guarantor and its successors and assigns and shall inure to the benefit of the successors and assigns of the Trustee and the Holders and, in the event of any transfer or assignment of rights by any Holder or the Trustee, the rights
and privileges conferred upon that party in this Indenture and in the Securities shall automatically extend to and be vested in such transferee or assignee, all subject to the terms and conditions of this Indenture. 

SECTION 1205.     No Waiver. Neither a failure nor a delay on the part of either the Trustee or the Holders in
exercising any right, power or privilege under this Article Twelve shall operate as a waiver thereof, nor shall a single or partial exercise thereof preclude any other or further exercise of any right, power or privilege. The rights, remedies and
benefits of the Trustee and the Holders herein expressly specified are cumulative and not exclusive of any other rights, remedies or benefits which either may have under this Article Twelve at law, in equity, by statute or otherwise. 

SECTION 1206.    Modification. No modification, amendment or waiver of any provision of this Article Twelve, nor
the consent to any departure by any Guarantor therefrom, shall in any event be effective unless the same shall be in writing and signed by the Trustee, and then such waiver or consent shall be effective only in the specific instance and for the
purpose for which given. No notice to or demand on any Guarantor in any case shall entitle such Guarantor to any other or further notice or demand in the same, similar or other circumstances. 

SECTION 1207.    Execution of Supplemental Indenture for Future Guarantors. Each Subsidiary which is required to
become a Guarantor pursuant to any Section of this Indenture shall promptly execute and deliver to the Trustee a supplemental indenture in the form of Exhibit B hereto pursuant to which such Subsidiary shall become a Guarantor under this
Article Twelve and shall guarantee the Obligations. Concurrently with the execution and delivery of such supplemental indenture, the Issuer shall deliver to the Trustee an Opinion of Counsel to the effect that such supplemental indenture has been
duly authorized, executed and delivered by such Subsidiary and that, subject to the application of bankruptcy, insolvency, moratorium, fraudulent conveyance or transfer and other similar laws relating to creditors’ rights generally and to the
principles of equity, whether considered in a proceeding at law or in equity, the Note Guarantee of such Guarantor is a legal, valid and binding obligation of such Guarantor, enforceable against such Guarantor in accordance with its terms. Each
Person then a Guarantor authorizes the Issuer to enter into such a supplemental indenture on its behalf. 
 SECTION
1208.    Subordination of Note Guarantees. The Issuer, the Guarantors and the Trustee may, without notice to or consent of any Holder of Securities, enter into one or more indentures supplemental to this Indenture
substantially in the form of Exhibit E hereto, or amend any indenture supplemental to this Indenture entered into by the Issuer, such Guarantor and the Trustee for the purpose of adding an additional Note Guarantee pursuant to Section 908 or
Section 913 to provide that the payment obligation on a Note Guarantee of a Guarantor that is an Issuer Restricted Subsidiary be expressly subordinated in any bankruptcy, liquidation or winding up proceeding of such Guarantor to the prior
payment in full in cash of all obligations of such Guarantor under any Guarantee of, or obligations under, any Qualified Credit Facility Incurred in accordance with clause (ii) of paragraph (b) of Section 908 of this Indenture and the
Existing Secured Notes; provided, however, that (x) the terms of the subordination 

  
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of a Note Guarantee to any such Guarantee of, or obligation under, a Qualified Credit Facility or the Existing Secured Notes may not eliminate or otherwise adversely affect the subordination of
the payment obligation on any other Debt of such Guarantor to the payment obligation of the Note Guarantee of such Guarantor and (y) any Guarantee (other than a Guarantee of such Qualified Credit Facility or the Existing Secured Notes) by such
Guarantor of any other Debt of Level 3 Parent also shall be expressly subordinated in any bankruptcy, liquidation or winding up proceeding of such Guarantor to the prior payment in full in cash of all obligations of such Guarantor under its
Guarantee of such Qualified Credit Facility and Existing Secured Notes to at least the same extent and on the same terms and conditions as the subordination provisions applicable to such Guarantor’s Note Guarantee. 

SECTION 1209.    Execution of Offering Proceeds Note Guarantees for Future Offering Proceeds Note Guarantors;
Subordination of Offering Proceeds Note Guarantee. 
 (a)    Each Subsidiary which is required to
become an Offering Proceeds Note Guarantor pursuant to any Section of this Indenture shall promptly execute, and deliver a copy to the Trustee of, an Offering Proceeds Note Guarantee substantially in the form set forth in Exhibit D hereto
pursuant to which such Subsidiary shall become an Offering Proceeds Note Guarantor. Concurrently with the execution and delivery of such Offering Proceeds Note Guarantee, the Issuer shall deliver to the Trustee an Opinion of Counsel to the effect
that such Offering Proceeds Note Guarantee has been duly authorized, executed and delivered by such Subsidiary and that, subject to the application of bankruptcy, insolvency, moratorium, fraudulent conveyance or transfer and other similar laws
relating to creditors’ rights generally and to the principles of equity, whether considered in a proceeding at law or in equity, the Offering Proceeds Note Guarantee of such Offering Proceeds Note Guarantor is a legal, valid and binding
obligation of such Offering Proceeds Note Guarantor, enforceable against such Offering Proceeds Note Guarantor in accordance with its terms. Any Offering Proceeds Note Guarantee of an Offering Proceeds Note Guarantor will be released on the terms,
and as set forth in, the form of Offering Proceeds Note Guarantee attached as Exhibit D hereto. 

(b)    Each Offering Proceeds Note Guarantor required expressly to subordinate the payment obligation of
certain intercompany Debt to obligations with respect to the Offering Proceeds Note Guarantee of such Offering Proceeds Note Guarantor pursuant to, and on terms set forth in, clause (vi) of paragraph (b) of Section 908, shall promptly
execute, and deliver a copy to the Trustee of, a supplement to the Parent Intercompany Note Subordination Agreement in substantially the form attached as Exhibit C hereto. 

[Signature Pages Follow] 

  
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 IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed, all as of
the day and year first above written. 
  

					
	LEVEL 3 FINANCING, INC., as Issuer
			
	  	 	By	 	 /s/ Rafael Martinez-Chapman

		 		 	 Name: Rafael Martinez-Chapman
 Title: Senior
Vice President – Treasurer

	
	LEVEL 3 PARENT, LLC., as Level 3 Parent and a Guarantor
			
		 	By	 	 /s/ Eric J. Mortensen

		 		 	 Name: Eric J. Mortensen
 Title: Senior Vice
President – Controller



 Signature Page to Indenture 







 
					
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee
			
	  	 	By	 	 /s/ Manjari Purkayastha

		 		 	 Name: Manjari Purkayastha
 Title: Vice
President



 Signature Page to Indenture 







 APPENDIX A 

FOR OFFERINGS TO PERSONS REASONABLY BELIEVED TO BE QUALIFIED INSTITUTIONAL BUYERS PURSUANT TO RULE 144A AND TO CERTAIN NON-U.S. PERSONS IN OFFSHORE TRANSACTIONS IN RELIANCE ON REGULATION S. 
 PROVISIONS RELATING TO SECURITIES 

1. Definitions 
 1.1
Definitions 
 For the purposes of this Appendix A the following terms shall have the meanings indicated below: 

“Additional Securities” means, subject to the Issuer’s compliance with the covenants in the Indenture, including
Section 908, 3.750% Sustainability-Linked Senior Notes due 2029 issued from time to time after the Issue Date under the terms of the Indenture (other than pursuant to Section 306, 307 or 1008 of the Indenture). 

“Definitive Security” means a certificated Security bearing, if required, the restricted securities legend set forth in
Section 2.3(c). 
 “Depository” means The Depository Trust Company, its nominees and their respective successors. 

“Initial Purchasers” means Morgan Stanley & Co. LLC, BofA Securities, Inc., Citigroup Global Markets Inc., Barclays
Capital Inc., Credit Suisse Securities (USA) LLC, Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC, RBC Capital Markets, LLC, Wells Fargo Securities, LLC, Fifth Third Securities, Inc., Mizuho Securities USA LLC, TD Securities (USA) LLC,
Truist Securities, Inc., Citizens Capital Markets, Inc., MUFG Securities Americas Inc., Regions Securities LLC and Deutsche Bank Securities Inc. 

“Offering Memorandum” means the final offering memorandum dated January 11, 2021, in connection with the sale of the
Securities. 
 “Original Securities” means Securities in the aggregate principal amount of $900,000,000 issued on
January 13, 2021. 
 “Purchase Agreement” means the Purchase Agreement dated as of January 11, 2021, among
Level 3 Parent, the Issuer and the Initial Purchasers relating to the Original Securities, or any similar agreement relating to any future sale of Securities by the Issuer. 

“QIB” means a “qualified institutional buyer” as defined in Rule 144A. 

“Securities” has the meaning stated in the first recital of the Indenture and more particularly means any Securities
authenticated and delivered under the Indenture. 
 “Securities Act” means the Securities Act of 1933, as amended (or any
successor act), and the rules and regulations thereunder (or respective successors thereto). 







 “Securities Custodian” means the custodian with respect to a Global Security (as
appointed by the Depository) or any successor person thereto, who shall initially be the Trustee. 
 “Transfer Restricted
Securities” means Definitive Securities and any other Securities that bear or are required to bear the legend set forth in Section 2.3(c) hereto. 

1.2 Other Definitions 
  

					
	 Term
	  	Defined in Section:	 
	 “Agent Members”
	  	 	2.1	(b) 
	 “Global Security”
	  	 	2.1	(a) 
	 “Regulation S”
	  	 	2.1	 
	 “Regulation S Global Security”
	  	 	2.1	(a) 
	 “Rule 144A”
	  	 	2.1	 
	 “Rule 144A Global Security”
	  	 	2.1	(a) 

 2. The Securities 

2.1 Form and Dating 
 The
Securities will be offered and sold by the Issuer, from time to time, pursuant to one or more Purchase Agreements. The Securities will be resold initially only to persons reasonably believed to be QIBs in reliance on Rule 144A under the Securities
Act (“Rule 144A”) and to certain non-U.S. persons in offshore transactions in reliance on Regulation S under the Securities Act (“Regulation S”). The Securities may thereafter
be transferred to, among others, QIBs and purchasers in reliance on Regulation S. 
 (a) Global Securities. Securities initially
resold pursuant to Rule 144A shall be issued initially in the form of one or more permanent global Securities in definitive, fully registered form (collectively, the “Rule 144A Global Security”) and Securities initially resold
pursuant to Regulation S shall be issued initially in the form of one or more global securities (collectively, the “Regulation S Global Security”), in each case without interest coupons and with the global securities legend and
restricted securities legend set forth in Exhibit 1 hereto, which shall be deposited on behalf of the purchasers of the Securities represented thereby with the Securities Custodian, and registered in the name of the Depository or a nominee of the
Depository, duly executed by the Issuer and authenticated by the Trustee as provided in the Indenture. The Rule 144A Global Security and Regulation S Global Security are collectively referred to herein as “Global Securities.” The
aggregate principal amount of the Global Securities may from time to time be increased or decreased by adjustments made on the records of the Trustee and the Depository or its nominee as hereinafter provided. 

(b) Book-Entry Provisions. This Section 2.1(b) shall apply only to a Global Security deposited with or on behalf of the
Depository. 
 The Issuer shall execute and the Trustee shall, in accordance with this Section 2.1(b) and pursuant to an order of the
Issuer, authenticate and deliver initially one or more Global Securities that (a) shall be registered in the name of the Depository for such Global Security or Global Securities or the nominee of such Depository and (b) shall be delivered
by the Trustee to such Depository or pursuant to such Depository’s instructions or held by the Trustee as Securities Custodian. 

  
 A-2 








 Members of, or participants in, the Depository (“Agent Members”) shall have no
rights under the Indenture with respect to any Global Security held on their behalf by the Depository or by the Trustee as Securities Custodian or under such Global Security, and the Depository may be treated by the Issuer, the Trustee and any agent
of the Issuer or the Trustee as the absolute and sole owner of such Global Security for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall prevent the Issuer, the Trustee or any agent of the Issuer or the Trustee from
giving effect to any written certification, proxy or other authorization furnished by the Depository or impair, as between the Depository and its Agent Members, the operation of customary practices of such Depository governing the exercise of the
rights of a holder of a beneficial interest in any Global Security. 
 (c) Definitive Securities. Except as provided in
Section 2.3 or 2.4, owners of beneficial interests in Global Securities will not be entitled to receive physical delivery of Definitive Securities. 

2.2 Authentication. The Trustee shall authenticate and deliver: (1) Original Securities and (2) any Additional Securities
upon a written order of the Issuer signed by two officers or by an officer and either an Assistant Treasurer or an Assistant Secretary of the Issuer. Such order shall specify the amount of the Securities to be authenticated and the date on which the
original issue of Securities is to be authenticated. 
 2.3 Transfer and Exchange. (a) Transfer and Exchange of Definitive
Securities. When Definitive Securities are presented to the Security Registrar or a co-registrar with a request: 

(x) to register the transfer of such Definitive Securities; or 

(y) to exchange such Definitive Securities for an equal principal amount of Definitive Securities of other authorized
denominations, 
 the Security Registrar or co-registrar shall register the transfer or make the exchange as
requested if its reasonable requirements for such transaction are met; provided, however, that the Definitive Securities surrendered for transfer or exchange: 

(i) shall be duly endorsed or accompanied by a written instrument of transfer in form reasonably satisfactory to the Issuer and
the Security Registrar or co-registrar, duly executed by the Holder thereof or his attorney duly authorized in writing; and 

(ii) are being transferred or exchanged pursuant to clause (A), (B) or (C) below, and are accompanied by the following
additional information and documents, as applicable: 
 (A) if such Definitive Securities are being delivered to the Security
Registrar by a Holder for registration in the name of such Holder, without transfer, a certification from such Holder to that effect; or 

(B) if such Definitive Securities are being transferred to the Issuer, a certification to that effect; or 

  
 A-3 








 (C) if such Definitive Securities are being transferred pursuant to an exemption
from registration in accordance with Rule 144 under the Securities Act, (i) a certification to that effect and (ii) if the Issuer so requests, an opinion of counsel or other evidence reasonably satisfactory to it as to the compliance with
the restrictions set forth in the legend set forth in Section 2.3(c)(i). 
 (b) Transfer and Exchange of Global
Securities. (i) The transfer and exchange of Global Securities or beneficial interests therein shall be effected through the Depository, in accordance with the Indenture (including applicable restrictions on transfer set forth herein, if
any) and the procedures of the Depository therefor. A transferor of a beneficial interest in a Global Security shall deliver a written order given in accordance with the Depository’s procedures containing information regarding the participant
account of the Depository to be credited with a beneficial interest in the Global Security and such account shall be credited in accordance with such instructions with a beneficial interest in the Global Security and the account of the Person making
the transfer shall be debited by an amount equal to the beneficial interest in the Global Security being transferred. 
 (ii)
If the proposed transfer is a transfer of a beneficial interest in one Global Security to a beneficial interest in another Global Security, the Security Registrar shall reflect on its books and records the date and an increase in the principal
amount of the Global Security to which such interest is being transferred in an amount equal to the principal amount of the interest to be so transferred, and the Security Registrar shall reflect on its books and records the date and a corresponding
decrease in the principal amount of the Global Security from which such interest is being transferred. 
 (iii)
Notwithstanding any other provisions of this Appendix A (other than the provisions set forth in Section 2.4), a Global Security may not be transferred as a whole except by the Depository to a nominee of the Depository or by a nominee of the
Depository to the Depository or another nominee of the Depository or by the Depository or any such nominee to a successor Depository or a nominee of such successor Depository. 

(iv) In the event that a Global Security is exchanged for Definitive Securities pursuant to Section 2.4, such Securities
may be exchanged only in accordance with such procedures as are substantially consistent with the provisions of this Section 2.3 (including the certification requirements set forth on the reverse of the Securities intended to ensure that such
transfers comply with Rule 144A, Regulation S or such other applicable exemption from registration under the Securities Act, as the case may be) and such other procedures as may from time to time be adopted by the Issuer. 

(c) Legend. 

(i) Except as permitted by the following paragraph (ii), each certificate evidencing the Global Securities and the Definitive
Securities (and all Securities issued in exchange therefor or in substitution thereof) shall bear a legend in substantially the following form: 

  
 A-4 








 “THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
“SECURITIES ACT”). THE HOLDER HEREOF, BY PURCHASING THIS NOTE, AGREES FOR THE BENEFIT OF THE ISSUER THAT THIS NOTE MAY NOT BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED (X) PRIOR TO THE FIRST ANNIVERSARY OF THE ISSUANCE HEREOF
(OR ANY PREDECESSOR NOTE HERETO) OR (Y) BY ANY HOLDER THAT WAS AN “AFFILIATE” (WITHIN THE MEANING OF RULE 144 UNDER THE SECURITIES ACT) OF THE ISSUER AT ANY TIME DURING THE THREE MONTHS PRECEDING THE DATE OF SUCH TRANSFER, IN EITHER
CASE OTHER THAN (1) TO THE ISSUER, (2) SO LONG AS THIS NOTE IS ELIGIBLE FOR RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT (“RULE 144A”), TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL
BUYER WITHIN THE MEANING OF RULE 144A PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE RESALE, PLEDGE OR OTHER TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A (AS INDICATED BY THE
BOX CHECKED BY THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS NOTE), (3) IN AN OFFSHORE TRANSACTION (AS DEFINED UNDER REGULATION S UNDER THE SECURITIES ACT) IN ACCORDANCE WITH REGULATION S UNDER THE SECURITIES ACT (AS INDICATED
BY THE BOX CHECKED BY THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS NOTE) OR (4) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 (IF APPLICABLE) UNDER THE SECURITIES ACT, IN EACH
CASE IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES. THE HOLDER HEREOF, BY PURCHASING THIS NOTE, REPRESENTS AND AGREES FOR THE BENEFIT OF THE ISSUER THAT IT IS (1) A QUALIFIED INSTITUTIONAL BUYER WITHIN THE
MEANING OF RULE 144A OR (2) A NON-U.S. PERSON OUTSIDE THE UNITED STATES WITHIN THE MEANING OF (OR AN ACCOUNT SATISFYING THE REQUIREMENTS OF PARAGRAPH (k)(2)(i) OF RULE 902 UNDER) REGULATION S UNDER THE
SECURITIES ACT.” 
 Each Definitive Security will also bear the following additional legend: 

“IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE SECURITY REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER
INFORMATION AS SUCH TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH THE FOREGOING RESTRICTIONS.” 

(ii) Upon any sale or transfer of a Transfer Restricted Security (including any Transfer Restricted Security represented by a
Global Security) pursuant to Rule 144 under the Securities Act: 
 (A) in the case of any Transfer Restricted Security that
is a Definitive Security, the Security Registrar shall permit the Holder thereof to exchange such Transfer Restricted Security for a Security that does not bear the legends set forth above and rescind any restriction on the transfer of such Transfer
Restricted Security; and 

  
 A-5 








 (B) in the case of any Transfer Restricted Security that is represented by a
Global Security, the Security Registrar shall permit the Holder thereof to exchange such Transfer Restricted Security for a Security that does not bear the legends set forth above and rescind any restriction on the transfer of such Transfer
Restricted Security, 
 in either case, if the Holder certifies in writing to the Security Registrar that its request for such exchange was
made in reliance on Rule 144 (such certification to be in the form set forth on the reverse of the Security). 
 (d)
Cancellation or Adjustment of Global Security. At such time as all beneficial interests in a Global Security have either been exchanged for Definitive Securities, redeemed, repurchased or canceled, such Global Security shall be returned by
the Depository to the Trustee for cancellation or retained and canceled by the Trustee. At any time prior to such cancellation, if any beneficial interest in a Global Security is exchanged for Definitive Securities, redeemed, repurchased or
canceled, the principal amount of Securities represented by such Global Security shall be reduced and an adjustment shall be made on the books and records of the Trustee (if it is then the Securities Custodian for such Global Security) with respect
to such Global Security, by the Trustee or the Securities Custodian, to reflect such reduction. 
 (e) Obligations with Respect to
Transfers and Exchanges of Securities. 
 (i) To permit registrations of transfers and exchanges, the Issuer shall
execute and the Trustee shall authenticate Definitive Securities and Global Securities at the Security Registrar’s or co-registrar’s request. 

(ii) No service charge shall be made for any registration of transfer or exchange, but the Issuer may require payment of a sum
sufficient to cover any transfer tax, assessments, or similar governmental charge payable in connection therewith (other than any such transfer taxes, assessments or similar governmental charge payable upon exchange or transfer pursuant to Sections
806 and 1008 of the Indenture). 
 (iii) The Security Registrar or co-registrar shall
not be required to register the transfer of or exchange of any Security for a period beginning 15 days before the mailing of a notice of redemption or an offer to repurchase Securities or 15 days before an interest payment date. 

(iv) Prior to the due presentation for registration of transfer of any Security, the Issuer, the Trustee, the Paying Agent, the
Security Registrar or any co-registrar may deem and treat the person in whose name a Security is registered as the absolute owner of such Security for the purpose of receiving payment of principal of and
interest on such Security and for all other purposes whatsoever, whether or not such Security is overdue, and none of the Issuer, the Trustee, the Paying Agent, the Security Registrar or any co-registrar shall
be affected by notice to the contrary. 

  
 A-6 








 (v) All Securities issued upon any transfer or exchange pursuant to the terms of
the Indenture shall evidence the same debt and shall be entitled to the same benefits under the Indenture as the Securities surrendered upon such transfer or exchange. 

(f) No Obligation of the Trustee. 

(i) The Trustee shall have no responsibility or obligation to any beneficial owner of a Global Security, a member of, or a
participant in the Depository or any other Person with respect to the accuracy of the records of the Depository or its nominee or of any participant or member thereof, with respect to any ownership interest in the Securities or with respect to the
delivery to any participant, member, beneficial owner or other Person (other than the Depository) of any notice (including any notice of redemption or repurchase) or the payment of any amount, under or with respect to such Securities. All notices
and communications to be given to the Holders and all payments to be made to Holders under the Securities shall be given or made only to the registered Holders (which shall be the Depository or its nominee in the case of a Global Security). The
rights of beneficial owners in any Global Security shall be exercised only through the Depository subject to the applicable rules and procedures of the Depository. The Trustee may conclusively rely and shall be fully protected in relying upon
information furnished by the Depository with respect to its members, participants and any beneficial owners. 
 (ii) The
Trustee shall have no obligation or duty to monitor, determine or inquire as to compliance with any restrictions on transfer imposed under the Indenture or under applicable law with respect to any transfer of any interest in any Security (including
any transfers between or among Depository participants, members or beneficial owners in any Global Security) other than to require delivery of such certificates and other documentation or evidence as are expressly required by, and to do so if and
when expressly required by, the terms of the Indenture, and to examine the same to determine substantial compliance as to form with the express requirements hereof. 

2.4 Definitive Securities 

(a) A Global Security deposited with the Depository or with the Trustee as Securities Custodian pursuant to Section 2.1 shall be
transferred to the beneficial owners thereof in the form of Definitive Securities in an aggregate principal amount equal to the principal amount of such Global Security, in exchange for such Global Security, only if such transfer complies with
Section 2.3 and (i) the Depository notifies the Issuer that it is unwilling or unable to continue as a Depository for such Global Security or if at any time the Depository ceases to be a “clearing agency” registered under the
Exchange Act, and a successor Depository is not appointed by the Issuer within 90 days of such notice, or (ii) a Default or an Event of Default has occurred and is continuing or (iii) the Issuer, in its sole discretion, notifies the
Trustee in writing that it elects to cause the issuance of Definitive Securities under the Indenture. 
 (b) Any Global Security that is
transferable to the beneficial owners thereof pursuant to this Section 2.4 shall be surrendered by the Depository to the Trustee, to be so transferred, in whole or from time to time in part, without charge, and the Trustee shall authenticate
and deliver, upon such transfer of each portion of such Global Security, an equal aggregate principal amount of Definitive Securities of authorized denominations. Definitive Securities issued in exchange for any portion of a Global Security


  
 A-7 








 
transferred pursuant to this Section shall be executed, authenticated and delivered only in denominations of $1,000 and any integral multiple thereof and registered in such names as the
Depository shall direct. Any Definitive Security delivered in exchange for an interest in the Global Security shall, except as otherwise provided by Section 2.3(c), bear the restricted securities legend set forth in Exhibit 1 hereto. 

(c) The registered Holder of a Global Security may grant proxies and otherwise authorize any Person, including Agent Members and Persons that
may hold interests through Agent Members, to take any action that a Holder is entitled to take under the Indenture or the Securities. 
 (d)
In the event of the occurrence of any of the events specified in Section 2.4(a)(i), (ii) or (iii), the Issuer will promptly make available to the Trustee a reasonable supply of Definitive Securities in definitive, fully registered form without
interest coupons. 

  
 A-8 








 EXHIBIT 1 

TO APPENDIX A 
 [FORM OF FACE OF
SECURITY] 
 [Global Securities Legend] 

[UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION
(“DTC”), NEW YORK, NEW YORK, TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS
WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. 
 TRANSFERS OF THIS GLOBAL SECURITY SHALL BE
LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS
SET FORTH IN THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.] 
 [Restricted Securities Legend] 

THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THE HOLDER HEREOF, BY
PURCHASING THIS NOTE, AGREES FOR THE BENEFIT OF THE ISSUER THAT THIS NOTE MAY NOT BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED (X) PRIOR TO THE FIRST ANNIVERSARY OF THE ISSUANCE HEREOF (OR ANY PREDECESSOR NOTE HERETO) OR (Y) BY ANY HOLDER
THAT WAS AN “AFFILIATE” (WITHIN THE MEANING OF RULE 144 UNDER THE SECURITIES ACT) OF THE ISSUER AT ANY TIME DURING THE THREE MONTHS PRECEDING THE DATE OF SUCH TRANSFER, IN EITHER CASE OTHER THAN (1) TO THE ISSUER, (2) SO
LONG AS THIS NOTE IS ELIGIBLE FOR RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT (“RULE 144A”) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER WITHIN THE MEANING OF RULE 144A PURCHASING FOR
ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE RESALE, PLEDGE OR OTHER TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A (AS INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE CERTIFICATE OF
TRANSFER ON THE REVERSE OF THIS NOTE), (3) IN AN OFFSHORE TRANSACTION (AS DEFINED UNDER REGULATION S UNDER THE SECURITIES ACT) IN ACCORDANCE WITH REGULATION S UNDER THE SECURITIES ACT (AS INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE
CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS NOTE) OR (4) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 (IF APPLICABLE) UNDER THE SECURITIES ACT, IN EACH CASE IN ACCORDANCE WITH ANY APPLICABLE
SECURITIES LAWS OF ANY STATE OF THE UNITED STATES. THE HOLDER HEREOF, BY PURCHASING THIS NOTE, REPRESENTS AND AGREES FOR THE BENEFIT OF THE ISSUER THAT IT IS (1) A QUALIFIED INSTITUTIONAL BUYER 








 
WITHIN THE MEANING OF RULE 144A OR (2) A NON-U.S. PERSON OUTSIDE THE UNITED STATES WITHIN THE MEANING OF (OR AN ACCOUNT SATISFYING THE REQUIREMENTS OF
PARAGRAPH (k)(2)(i) OF RULE 902 UNDER) REGULATION S UNDER THE SECURITIES ACT. 
 [Definitive Securities Legend] 

[IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE SECURITY REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION
AS SUCH TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH THE FOREGOING RESTRICTIONS.] 

  
 2 








 [FORM OF FACE OF SECURITY] 

 

			
	 No. [•]
	  	[up to $500,000,000 in an initial amount of $[•]; the principal amount of Level 3 Financing Inc.’s 3.750% Sustainability-Linked Senior Notes due 2029 represented by this Security and all other Securities
constituting Original Securities not to exceed at any time the lesser of $900,000,000 and the aggregate principal amount of such 3.750% Sustainability-Linked Senior Notes due 2029 then outstanding.]**

 3.750% Sustainability-Linked Senior Notes due 2029 

CUSIP No. [527298 BT9]*[ U52783
AY0]† 
 ISIN No.
[US527298BT90]‡[ USU52783AY07]§ 
 LEVEL 3 FINANCING, INC., a Delaware corporation, promises to pay
to [Cede & Co.]**, or registered assigns, the principal sum [of                 Dollars]†† [set forth on the Schedule of Increases or Decreases annexed hereto] on July 15, 2029 (the
“Scheduled Maturity Date”). 
 Interest Payment Dates: January 15 and July 15. 

Record Dates: January 1 and July 1. 
  

 

	**	 Insert for Global Securities 



	*	 For 144A Notes 



	† 	 For Regulation S Notes. 



	‡ 	 For 144A Notes 



	§ 	 For Regulation S Notes. 



	†† 	 Insert for Definitive Securities 









 Additional provisions of this Security are set forth on the other side of this Security. 

IN WITNESS WHEREOF, the parties have caused this instrument to be duly executed. 

 

					
	LEVEL 3 FINANCING, INC.
			
	  	 	By	 	  

		 		 	 Name:
 Title:

			
		 	By	 	  

		 		 	 Name:
 Title:



 TRUSTEE’S CERTIFICATE OF AUTHENTICATION 

Dated: 
 THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., 

as Trustee, certifies 
 that this
is one of 
 the Securities referred 

to in the Indenture. 
  

			
		
	by:	 	 
		 	 Authorized Signatory



  
 2 








 [FORM OF REVERSE SIDE OF SECURITY] 

3.750% Sustainability-Linked Senior Notes due 2029 

Capitalized terms used and not otherwise defined herein shall have the meanings assigned to such terms in the Indenture referred to below.

 1. Interest 
 LEVEL
3 FINANCING, INC., a Delaware corporation (such corporation, and its successors and assigns under the Indenture hereinafter referred to, being herein called the “Issuer”), promises to pay interest on the principal amount of this
Security at the rate per annum shown above (the “Original Interest Rate”), subject to adjustment pursuant to this Section 1. The Issuer will pay interest semiannually on January 15 and July 15 of each year, commencing
July 15, 2021. Interest on the Security will accrue from the most recent date to which interest has been paid or, if no interest has been paid, from January 13, 2021. Interest shall be computed on the basis of a 360-day year of twelve 30-day months. In any case where any interest payment date falls on a day that is not a Business Day, the related payment of interest will be made on
the next succeeding Business Day with the same force and effect as if it were made on such interest payment date, and no interest shall accrue in respect of such payment for the period from and after such interest payment date to the next Business
Day. 
 From and including the Interest Rate Step Up Date, the interest rate payable on the Securities will be increased from the Original
Interest Rate to the Fully-Adjusted Subsequent Interest Rate unless the Issuer has delivered the Satisfaction Notification on or before the Notification Deadline stating that it has determined that Lumen has either: (i) attained one of the
Sustainability Performance Targets but not the other and received a related Assurance Letter, in which case the interest rate from and including the Interest Rate Step Up Date shall be increased from the Original Interest Rate to the
Partially-Adjusted Subsequent Interest Rate, or (ii) attained both of the Sustainability Performance Targets and received a related Assurance Letter, in which case the interest rate from and including the Interest Rate Step Up Date shall remain
unchanged from the Original Interest Rate. If as of the Notification Deadline (x) the Issuer fails, or is unable, to provide the Satisfaction Notification, (y) neither of the Sustainability Performance Targets has been satisfied or
(z) the Issuer fails to receive an Assurance Letter, then in each case the interest rate payable on the Securities will be increased from the Original Interest Rate to the Fully-Adjusted Subsequent Interest Rate and such Fully-Adjusted
Subsequent Interest Rate will apply for each interest period from and including the Interest Rate Step Up Date to, and including, the maturity date. If at any time on or prior to the Notification Deadline the Issuer has provided the Satisfaction
Notification indicating that one of the Sustainability Performance Targets has been met but not the other, the Partially-Adjusted Subsequent Interest Rate will apply for each interest period from and including the Interest Rate Step Up Date to, and
including, the maturity date. If at any time on or prior to the Notification Deadline the Issuer has provided the Satisfaction Notification indicating that both of the Sustainability Performance Targets have been met, the Original Interest Rate
shall remain unchanged through, and including, the maturity date. The interest rate applicable to the Securities will only be adjusted with respect to any Satisfaction Notification delivered to the Trustee on or prior to the Notification Deadline.
Any satisfaction of a Sustainability Performance Target subsequent to the Notification Deadline or cessation of satisfaction, or any failure to satisfy a Sustainability Performance Target subsequent to the Notification Deadline will not result in an
adjustment to the interest rate payable on the Securities. Notwithstanding the foregoing, no Satisfaction Notification will have any legal effect unless it is delivered after December 31, 2022, and is based on a determination of Lumen’s
attainment of either or both of the Sustainability Performance Targets reflecting Lumen’s performance through a date on or after December 31, 2022. 







 2. Method of Payment 

The Issuer will pay regular semiannual interest in arrears on the Securities (except defaulted interest) to the Persons who are registered
holders of Securities at the close of business on the January 1 or July 1 next preceding the interest payment date even if Securities are canceled after the record date and on or before the interest payment date. Holders must surrender
Securities to a Paying Agent to collect principal payments. The Issuer will pay principal and interest in money of the United States of America that at the time of payment is legal tender for payment of public and private debts. Payments in respect
of the Securities represented by a Global Security (including principal, premium and interest) will be made by wire transfer of immediately available funds to the accounts specified by The Depository Trust Company. The Issuer will make all payments
in respect of a Definitive Security (including principal, premium and interest), by mailing a check to the registered address of each Holder thereof; provided, however, that, at the option of the Issuer, payments on the Securities may
also be made, in the case of a Holder of at least $1,000,000 aggregate principal amount of Securities, by wire transfer to a U.S. dollar account maintained by the payee with a bank in the United States if such Holder requests payment by wire
transfer by giving written notice to the Trustee or the Paying Agent to such effect designating such account no later than 30 days immediately preceding the relevant due date for payment (or such other date as the Trustee may accept in its
discretion). 
 3. Paying Agent and Security Registrar 

Initially, THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., a national banking association (the “Trustee”), will act as
Paying Agent and Security Registrar. The Issuer may appoint and change any Paying Agent, Security Registrar or co-registrar without notice. 

4. Indenture 
 The Issuer
issued the Securities under an Indenture dated as of January 13, 2021 (the “Indenture”), among Level 3 Parent, the Issuer and the Trustee. The terms of the Securities include those stated in the Indenture. Terms defined in
the Indenture and not defined herein have the meanings ascribed thereto in the Indenture. The Securities are subject to all such terms, and Holders are referred to the Indenture for a statement of those terms. 

The Securities are unsubordinated, unsecured obligations of the Issuer. [This Security is one of the Original Securities referred to in the
Indenture issued in an aggregate principal amount of $900,000,000. The Securities include the Original Securities and any Additional Securities]. [This Security is one of the Additional Securities issued in addition to the Original Securities in an
aggregate principal amount of $900,000,000 previously issued under the Indenture. The Original Securities and the Additional Securities are treated as a single class of securities under the Indenture.] The Indenture imposes certain limitations on
the ability of Level 3 Parent, the Issuer and their respective Restricted Subsidiaries to, among other things, incur Debt, incur Priority Debt and create and incur Liens. The Indenture also imposes limitations on the ability of Level 3
Parent, the Issuer and their respective Restricted Subsidiaries to consolidate or merge with or into any other Person or sell, transfer, assign, lease, convey or otherwise dispose of all or substantially all of the Property of such entities. 

  
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 To guarantee the due and punctual payment of the principal and interest on the Securities and all
other amounts payable by the Issuer under the Indenture and the Securities when and as the same shall be due and payable, whether at maturity, by acceleration or otherwise, according to the terms of the Securities and the Indenture, Level 3
Parent has fully and unconditionally guaranteed the Securities on an unsubordinated and unsecured basis pursuant to the terms of the Indenture. 

5. Optional Redemption 

At any time or from time to time prior to January 15, 2024, the Issuer may, at its option, redeem some or all of the Securities, upon not
less than 10 nor more than 60 days’ prior notice, at a Redemption Price equal to 100% of the principal amount of the Securities so redeemed plus the Applicable Premium as of, and accrued and unpaid interest thereon (if any) to, but not
including, the Redemption Date (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant Interest Payment Date). 

“Applicable Premium” means, with respect to any Security on any Redemption Date, the greater of (1) 1.0% of the principal
amount of such Security and (2) the excess, if any, of (a) the present value at such Redemption Date of (i) the Redemption Price of such Security at January 15, 2024 (such Redemption Price being set forth in the table appearing
in this Section 5), plus (ii) all required interest payments due on such Security through January 15, 2024 (excluding accrued but unpaid interest to the Redemption Date), computed using a discount rate equal to the Treasury Rate as of
such Redemption Date plus 50 basis points, over (b) the principal amount of such Security. For the avoidance of doubt, calculations of the Applicable Premium and Redemption Price shall not be a duty of the Trustee or any Paying Agent. 

“Treasury Rate” means, as of any Redemption Date, the yield to maturity as of such Redemption Date of United States Treasury
securities with a constant maturity (as compiled and published in the most recent Federal Reserve Statistical Release H.15 that has become publicly available at least two Business Days prior to such Redemption Date (or, if such Statistical Release
is no longer published, any publicly available source of similar market data)) most nearly equal to the period from the Redemption Date to January 15, 2024; provided, however, that if the period from the Redemption Date to
January 15, 2024 is less than one year, the weekly average yield on actually traded United States Treasury securities adjusted to a constant maturity of one year will be used. 

At any time or from time to time on or after January 15, 2024, the Issuer may, at its option, redeem some or all of the Securities, upon
not less than 10 nor more than 60 days’ prior notice, at the Redemption Prices set forth below (expressed as a percentage of principal amount), plus accrued and unpaid interest thereon (if any) to, but not including, the Redemption Date
(subject to the right of holders of record on the relevant record date to receive interest due on the relevant interest payment date), if redeemed during the twelve months beginning January 15 of the years indicated below: 

 

					
	 Period
	  	Redemption Price	 
	 2024
	  	 	101.875	% 
	 2025
	  	 	100.938	% 
	 2026 and thereafter
	  	 	100.000	% 


  
 3 








 In addition, at any time or from time to time on or prior to January 15, 2024, the Issuer
may, at its option, redeem up to 40% of the original aggregate principal amount of the Securities (including any Additional Securities) at a Redemption Price equal to 103.750% of the principal amount of the Securities so redeemed, plus accrued and
unpaid interest thereof (if any) to the Redemption Date (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant Interest Payment Date), with the net cash proceeds from one or more private
placements to a Person other than a member of the Lumen Credit Group of, or underwritten public offerings of, Common Stock of the Issuer, or contributed to the capital of the Issuer with the net cash proceeds from one or more private placements to a
Person other than a member of the Lumen Credit Group of, or underwritten public offerings of, Common Stock of Level 3 Parent; provided, however, that at least 60% of the original aggregate principal amount of the Securities
(including any Additional Securities) would remain outstanding immediately after giving effect to such redemption. Any such redemption shall be made within 180 days of such private placement or public offering upon not less than 10 nor more than 60
days’ prior notice. 
 Notwithstanding the foregoing, in connection with any tender offer for the Securities, including any Offer to
Purchase, if Holders of not less than 90% in aggregate principal amount of the outstanding Securities validly tender and do not withdraw such Securities in such tender offer and the Issuer, or any third party making such tender offer in lieu of the
Issuer, purchases all of the Securities validly tendered and not withdrawn by such Holders, the Issuer or such third party shall have the right, upon not less than 10 nor more than 60 days’ prior notice, given not more than 60 days following
such purchase date, to redeem (with respect to the Issuer) or repurchase (with respect to a third party) all Securities that remain outstanding following such purchase at a Redemption Price equal to the greater of (i) the highest price offered
to any other Holder in such tender offer or other offer to purchase, which may be less than par and shall exclude any early tender premium or similar premium and any accrued and unpaid interest, and (ii) 100% of the principal amount of the
Securities redeemed, plus accrued and unpaid interest, if any, thereon, to, but not including, the Redemption Date or purchase date, subject to the right of holders of record of the Securities on the relevant record date to receive interest due on
the relevant interest payment date falling on or prior to the date of redemption or purchase. 
 Notice of any redemption of, or any offer
to purchase, the Securities may, at the Issuer’s discretion, be (i) given in connection with, and prior to the completion of, any private placements or underwritten public offerings of the Issuer’s debt or equity securities, other
transactions (or series of related transactions) or an event that constitutes a Change of Control, and (ii) subject to one or more conditions precedent, including, but not limited to, completion of any such offering, transaction or other event,
as the case may be. If any redemption is so subject to the satisfaction of one or more conditions precedent, the notice thereof shall describe each such condition and, if applicable, shall state that, in the Issuer’s discretion, the redemption
date may be delayed until such time as any or all such conditions shall be satisfied, or such redemption may not occur and any notice with respect to such redemption or purchase may be rescinded in the event that any or all such conditions shall not
have been satisfied or waiver by the redemption date or purchase date, or by the redemption date or purchase date as so delayed, or such notice or offer may be rescinded at any time in the Issuer’s discretion if it reasonably believes that any
or all of such conditions will not be satisfied or waived. In addition, the Issuer may provide in such notice or offer that payment of the redemption or purchase price and performance of the Issuer’s obligations with respect to such redemption
or offer to purchase may be performed by another person. 
 If the Issuer has given notice of redemption as provided in the Indenture and
made available funds for the redemption of the Securities (or any portion thereof) called for redemption on or prior to the 

  
 4 








 
redemption date referred to in such notice, those Securities will cease to bear interest on or after that redemption date and the only right of the holders of those Securities will be to receive
payment of the redemption price, together with any accrued and unpaid interest. 
 6. Sinking Fund 

The Securities are not subject to any sinking fund. 

7. Notice of Redemption 

Notice of redemption will be mailed in the manner set forth in the Indenture. 

8. Repurchase of Securities at the Option of Holders upon Change of Control Triggering Event 

Upon a Change of Control Triggering Event, any Holder of Securities will have the right, subject to certain exceptions and conditions
specified in the Indenture, to require the Issuer to repurchase all or any part of the Securities of such Holder at a purchase price in cash equal to 101% of the principal amount of the Securities to be repurchased on the Purchase Date plus accrued
and unpaid interest, if any, to such Purchase Date (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant Interest Payment Date that is on or prior to the date of purchase) as provided in, and
subject to the terms of, the Indenture. 
 9. Denominations; Transfer; Exchange 

The Securities are in registered form without coupons in denominations of $1,000 and whole multiples of $1,000. A Holder may transfer or
exchange Securities in accordance with the Indenture. Upon any transfer or exchange, the Security Registrar and the Trustee may require a Holder, among other things, to furnish appropriate endorsements or transfer documents and to pay any taxes and
fees required by law or permitted by the Indenture. The Security Registrar need not register the transfer of or exchange any Securities selected for redemption (except, in the case of a Security to be redeemed in part, the portion of the Security
not to be redeemed) or to transfer or exchange any Securities for a period of 15 days prior to the mailing of a notice of redemption of Securities to be redeemed or 15 days before an interest payment date. 

10. Persons Deemed Owners 

The registered Holder of this Security may be treated as the owner of it for all purposes. 

11. Unclaimed Money 
 If
money for the payment of principal or interest remains unclaimed for two years, then such money shall be handled in the manner set forth in the Indenture. 

12. Discharge and Defeasance 

Subject to certain conditions, the Issuer at any time may terminate some of or all its obligations under the Securities and the Indenture if
the Issuer deposits with the Trustee money or U.S. Government Obligations for the payment of principal and interest on the Securities to redemption or maturity, as the case may be. 

  
 5 








 13. Amendment, Waiver 

Subject to certain exceptions set forth in the Indenture, (i) the Indenture or the Securities may be amended without prior notice to any
Holder but with the written consent of the Holders of at least a majority (or, with respect to certain covenants, the written consent of at least two-thirds) in aggregate principal amount of the Outstanding
Securities and (ii) any default or noncompliance with any provision may be waived with the written consent of the Holders of at least a majority in principal amount of the Outstanding Securities. Subject to certain exceptions set forth in the
Indenture, without the consent of any Holder of Securities, the Issuer and the Trustee may amend the Indenture or the Securities to effect certain changes specified in the Indenture. 

14. Defaults and Remedies 

If an Event of Default occurs and is continuing, the Trustee or the Holders of at least 30% in aggregate principal amount of the Securities
then outstanding, subject to certain limitations, may declare all the Securities to be immediately due and payable. Certain events of bankruptcy or insolvency are Events of Default and shall result in the Securities being immediately due and payable
upon the occurrence of such Events of Default without any further act of the Trustee or any Holder. 
 Holders of Securities may not enforce
the Indenture or the Securities except as provided in the Indenture. The Trustee may refuse to enforce the Indenture or the Securities unless it receives reasonable indemnity or security. Subject to certain limitations, Holders of a majority in
aggregate principal amount of the Securities then outstanding may direct the Trustee in its exercise of any trust or power under the Indenture. The Holders of a majority in aggregate principal amount of the Securities then outstanding, by written
notice to the Issuer and the Trustee, may rescind any declaration of acceleration and its consequences if the rescission would not conflict with any judgment or decree, and if all existing Events of Default have been cured or waived except
nonpayment of principal or interest that has become due solely because of the acceleration. 
 15. Trustee Dealings with the Issuer

 The Trustee under the Indenture, in its individual or any other capacity, may become the owner or pledgee of Securities and may otherwise
deal with and collect obligations owed to it by the Issuer or its Affiliates and may otherwise deal with the Issuer or its Affiliates with the same rights it would have if it were not Trustee. 

16. No Recourse Against Others 

No director, officer, employee, incorporator or stockholder, as such, of the Issuer or any Guarantor shall have any liability for any
obligations of the Issuer or any Guarantor under the Securities or the Indenture or for any claim based on, in respect of or by reason of such obligations or their creation, solely by reason of its status as a director, officer, employee,
incorporator or stockholder of the Issuer or a Guarantor. By accepting a Security, each Holder waives and releases all such liability. The waiver and release are part of the consideration for the issue of the Securities. 

  
 6 








 17. Authentication 

This Security shall not be valid until an authorized signatory of the Trustee (or an authenticating agent) manually, electronically or by
facsimile signs the certificate of authentication on the other side of this Security. 
 18. Abbreviations 

Customary abbreviations may be used in the name of a Holder or an assignee, such as TEN COM (=tenants in common), TEN ENT (=tenants by the
entireties), JT TEN (=joint tenants with rights of survivorship and not as tenants in common), CUST (=custodian), and U/G/M/A (=Uniform Gift to Minors Act). 

19. Governing Law 
 THIS
SECURITY SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE
REQUIRED THEREBY. 
 20. CUSIP Numbers 

Pursuant to a recommendation promulgated by the Committee on Uniform Security Identification Procedures, the Issuer has caused CUSIP numbers
to be printed on the Securities and has directed the Trustee to use CUSIP numbers in notices of redemption as a convenience to Holders. No representation is made as to the accuracy of such numbers either as printed on the Securities or as contained
in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon. 
 The Issuer will
furnish to any Holder of Securities upon written request and without charge to the Holder a copy of the Indenture. 

  
 7 








 ASSIGNMENT FORM 

To assign this Security, fill in the form below: 
 I or we
assign and transfer this Security to 
 (Print or type assignee’s name, address and zip code) 

(Insert assignee’s soc. sec. or tax I.D. No.) 

and irrevocably appoint                  agent to transfer this Security on
the books of the Issuer. The agent may substitute another to act for him. 
  

			
	                                      
                                         
                             	  	
		
	Date: ______________ Your Signature: _____________________	  	
		
	                                      
                                         
                             	  	

 Sign exactly as your name appears on the other side of this Security. 

In connection with any transfer of any of the Securities evidenced by this certificate occurring prior to the expiration of the period referred to in Rule
144(d) under the Securities Act after the later of the date of original issuance of such Securities and the last date, if any, on which such Securities were owned by the Issuer or any Affiliate of the Issuer, the undersigned confirms that such
Securities are being transferred in accordance with its terms: 
 CHECK ONE BOX BELOW 

 

									
		 	(1)	 				  	☐        to the Issuer; or
				
		 	(2)	 				  	☐        inside the United States to a “qualified institutional buyer” (as defined in Rule 144A under the Securities Act of 1933) that purchases for its own account or for the
account of a qualified institutional buyer to whom notice is given that such transfer is being made in reliance on Rule 144A, in each case pursuant to and in compliance with Rule 144A under the Securities Act of 1933; or
				
		 	(3)	 				  	☐        outside the United States in an offshore transaction within the meaning of Regulation S under the Securities Act in compliance with Rule 904 under the Securities Act of 1933;
or
				
		 	(4)	 				  	☐        pursuant to another available exemption from registration provided by Rule 144 under the Securities Act of 1933.

 Unless one of the boxes is checked, the Trustee will refuse to register any of the Securities evidenced by this certificate in
the name of any person other than the registered holder thereof; provided, however, that if box (3) or (4) is checked, the Trustee may require, prior to registering any such transfer of the Securities, such legal opinions,
certifications and other information as the Issuer has reasonably requested to confirm 







 
that such transfer is being made pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act of 1933. 

 

					
		 		 	  
  

Your



 
					
	  
  

signature
	 		 	


  

					
	 Signature Guarantee:
	  		  	
			
	
Date:                  
                      
	  	  
	  	
	Signature must be guaranteed	  	 Signature of Signature
	  	
	by a participant in a	  	             Guarantee
	  	
	 recognized signature guaranty
 medallion program
or other
 signature guarantor acceptable
 to the
Trustee
	  		  	

  
  

TO BE COMPLETED BY PURCHASER IF (2) ABOVE IS CHECKED: 

The undersigned represents and warrants that it is purchasing this Security for its own account or an account with respect to which it
exercises sole investment discretion and that it and any such account is a “qualified institutional buyer” within the meaning of Rule 144A under the Securities Act of 1933, and is aware that the sale to it is being made in reliance on Rule
144A and acknowledges that it has received such information regarding the Issuer as the undersigned has requested pursuant to Rule 144A or has determined not to request such information and that it is aware that the transferor is relying upon the
undersigned’s foregoing representations in order to claim the exemption from registration provided by Rule 144A. 
  

					
	Dated:                    	  	  
	  	
		  	 NOTICE: To be executed by an

executive officer        
	  	


  
 2 








 [TO BE ATTACHED TO GLOBAL SECURITIES] 

SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY 

The initial principal amount of this Global Security is
$[                ]. The following increases or decreases in this Global Security have been made: 

 

									
	Date of Exchange	  	 Amount of decrease in
 Principal Amount of

this Global Security
	  	 Amount of increase in
 Principal Amount of

this Global Security
	  	 Principal amount of this

Global Security following

such decrease or increase
	  	 Signature of authorized
 signatory of
Trustee or
 Securities Custodian



  
 3 








 OPTION OF HOLDER TO ELECT PURCHASE 

If you want to elect to have this Security purchased by the Issuer pursuant to Section 907 (Change of Control Triggering Event) of the
Indenture, check the box: 
  

☐                     

If you want to elect to have only part of this Security purchased by the Issuer pursuant to Section 907 of the Indenture, state the
amount: 
  

									
	$	 		  		 		  	
					
	Date:	 	
                     
    
	  	Your Signature:	 	
                     
            
	  	
	(Sign exactly as your name appears on the other side of the Security)


			
		
	Signature Guarantee:	  	                                     
                                       
	 	  	Signature must be guaranteed by a participant in a recognized signature guaranty medallion
program or other signature guarantor acceptable to the Trustee.








 EXHIBIT A 

INCUMBENCY CERTIFICATE 

The undersigned, ____________, being the ____________ of ____________ (the “Company”) does hereby certify that the
individuals listed below are qualified and acting officers of the Company as set forth in the right column opposite their respective names and the signatures appearing in the extreme right column opposite the name of each such officer is a true
specimen of the genuine signature of such officer and such individuals have the authority to execute documents to be delivered to, or upon the request of, The Bank of New York Mellon Trust Company, N.A., as Trustee under the Indenture dated as of
January 13, 2021, among the Company, Level 3 Parent, LLC, Level 3 Financing, Inc. and The Bank of New York Mellon Trust Company, N.A. 
  

											
	 Name
	 	 Title
	 	 Signature
	 	 	 	 	 	 
	                        	 	                        	 	                        	 		 		 	
						
	                        	 	                        	 	                        	 		 		 	
						
	                        	 	                        	 	                        	 		 		 	

 IN WITNESS WHEREOF, the undersigned has duly executed and delivered this Certificate as of the ____ day of
________, 20__. 
  

	
	  

Name:

	 Title:










 EXHIBIT B 

FORM OF SUPPLEMENTAL INDENTURE 

SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”) dated as
of                , among [GUARANTOR] (the “New Guarantor”), a direct or indirect subsidiary of LEVEL 3 PARENT, LLC (or its successor), a Delaware
limited liability company (“Level 3 Parent”), LEVEL 3 PARENT, LEVEL 3 FINANCING, INC., a Delaware corporation (the “Issuer”) on behalf of itself and the Guarantors (the “Existing
Guarantors”), if any, under the Indenture referred to below, and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., a national banking association, as trustee under the Indenture referred to below (the “Trustee”). 

W I T N E S S E T H : 
 WHEREAS,
the Issuer and Level 3 Parent have heretofore executed and delivered to the Trustee an Indenture dated as of January 13, 2021 (the “Indenture”; capitalized terms used but not defined herein having the meanings assigned
thereto in the Indenture), providing for the issuance of its 3.750% Sustainability-Linked Senior Notes due 2029; 
 WHEREAS, the Indenture
permits the New Guarantor to execute and deliver to the Trustee a supplemental indenture pursuant to which the New Guarantor shall unconditionally guarantee all the Issuer’s obligations under the Securities pursuant to a Guarantee on the terms
and conditions set forth herein; 
 WHEREAS, the Guarantee contained in this Supplemental Indenture shall constitute a “Restricted
Subsidiary Guarantee”, and the New Guarantor shall constitute a “Guarantor”, for all purposes of the Indenture; 

WHEREAS, pursuant to Section 801 and Section 1207 of the Indenture, the Trustee and the Issuer are authorized to execute and deliver
this Supplemental Indenture; and 
 WHEREAS, all acts and requirements necessary to make this Supplemental Indenture the legal, valid and
binding obligation of Level 3 Parent, the Issuer, [the Existing Guarantors] and the New Guarantor have been done. 
 NOW THEREFORE, in
consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the New Guarantor, the Issuer, the Existing Guarantors and the Trustee mutually covenant and agree for the equal and ratable
benefit of the Holders of the Securities as follows: 
 1. Agreement to Guaranty. The New Guarantor hereby agrees, jointly and
severally with all the existing Guarantors, to unconditionally guarantee the Issuer’s obligations under the Securities and the Indenture on the terms and subject to the conditions set forth in Article Twelve of the Indenture and to be bound by
all other applicable provisions of the Indenture and the Securities. 
 2. Successors and Assigns. This Supplemental Indenture shall
be binding upon the New Guarantor and its successors and assigns and shall inure to the benefit of the successors and assigns of the Trustee 







 
and the Holders and, in the event of any transfer or assignment of rights by any Holder or the Trustee, the rights and privileges conferred upon that party in the Indenture and in the Securities
shall automatically extend to and be vested in such transferee or assignee, all subject to the terms and conditions of the Indenture. 
 3.
No Waiver. Neither a failure nor a delay on the part of either the Trustee or the Holders in exercising any right, power or privilege under this Supplemental Indenture, the Indenture or the Securities shall operate as a waiver thereof, nor
shall a single or partial exercise thereof preclude any other or further exercise of any right, power or privilege. The rights, remedies and benefits of the Trustee and the Holders herein and therein expressly specified are cumulative and not
exclusive of any other rights, remedies or benefits which either may have under this Supplemental Indenture, the Indenture or the Securities at law, in equity, by statute or otherwise. 

4. Modification. No modification, amendment or waiver of any provision of this Supplemental Indenture, nor the consent to any departure
by the New Guarantor therefrom, shall in any event be effective unless the same shall be in writing and signed by the Trustee, and then such waiver or consent shall be effective only in the specific instance and for the purpose for which given. No
notice to or demand on the New Guarantor in any case shall entitle the New Guarantor to any other or further notice or demand in the same, similar or other circumstances. 

5. Opinion of Counsel. Concurrently with the execution and delivery of this Supplemental Indenture, the Issuer shall deliver to the
Trustee an Opinion of Counsel to the effect that this Supplemental Indenture has been duly authorized, executed and delivered by each of the New Guarantor and the Issuer and that, subject to the application of bankruptcy, insolvency, moratorium,
fraudulent conveyance or transfer and other similar laws relating to creditors’ rights generally and to the principles of equity, whether considered in a proceeding at law or in equity, the Guarantee of the New Guarantor is a legal, valid and
binding obligation of the New Guarantor, enforceable against the New Guarantor in accordance with its terms. 
 6. Ratification of
Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This
Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder of Securities heretofore or hereafter authenticated and delivered shall be bound hereby. 

7. Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

8. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but
all of them together represent the same agreement. 
 9. Effect of Headings. The Section headings herein are for convenience only and
shall not effect the construction thereof. 

  
 B-2 








 10. Trustee. The Trustee makes no representations as to the validity or sufficiency of
this Supplemental Indenture. The recitals and statements herein are deemed to be those of the Issuer, Level 3 Parent, the Existing Guarantors and the New Guarantor, and not of the Trustee. 

[Remainder of this page intentionally left blank] 

  
 B-3 








 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed as of the date
first above written. 
  

					
	[NEW GUARANTOR],
			
	  	 	By	 	  

		 		 	 Name:
 Title:



  

					
	LEVEL 3 PARENT, LLC,
			
	  	 	By	 	  

		 		 	 Name:
 Title:



  

					
	LEVEL 3 FINANCING, INC., on behalf of itself as the Issuer and the Existing Guarantors, if any,
			
	  	 	By	 	  

		 		 	 Name:
 Title:



  

					
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee,
			
	  	 	By	 	  

		 		 	 Name:
 Title:




  
 B-4 








 EXHIBIT C 

PARENT INTERCOMPANY NOTE SUBORDINATION AGREEMENT dated as of January 13, 2021 among LEVEL 3 FINANCING, INC. (the
“Issuer”), LEVEL 3 COMMUNICATIONS, LLC (“Level 3 LLC”), each Issuer Restricted Subsidiary (as defined in the Indenture described below) that becomes party hereto as provided in
Section 4.12 hereto (each such Issuer Restricted Subsidiary and Level 3 LLC individually, a “Subordinated Borrower,” and collectively, the “Subordinated Borrowers”), LEVEL 3 PARENT, LLC
(“Level 3 Parent”), and each Issuer Restricted Subsidiary that becomes party hereto as provided in Section 4.13 hereto (each such Issuer Restricted Subsidiary and Level 3 Parent individually, a
“Subordinated Lender,” and collectively, the “Subordinated Lenders”). 
 Reference is made to (a) the
Purchase Agreement dated as of January 11, 2021 (the “Purchase Agreement”) among the initial purchasers party thereto (the “Purchasers”), the Issuer and Level 3 Parent, (b) the Indenture dated as of
January 13, 2021 (the “Indenture”) among the Issuer, Level 3 Parent, as guarantor, and The Bank of New York Mellon Trust Company, N.A., as trustee (in such capacity, the “Trustee”), (c) the
intercompany demand note dated the Issue Date, in an initial principal amount equal to $900,000,000, issued by Level 3 LLC to the Issuer, as it may be amended from time to time pursuant to Sections 301 and 913 of the Indenture (the
“Offering Proceeds Note”) and (d) the intercompany demand note dated December 8, 1999, as amended and restated on October 1, 2003 (the “Parent Intercompany Note”) issued by Level 3 LLC to
Level 3 Parent, the outstanding balance of which, as of September 30, 2020, was approximately $41,200,000,000. Capitalized terms used herein and not otherwise defined shall have the meanings assigned to such terms in the Indenture. 

The Issuer has agreed to sell to the Purchasers, upon the terms set forth in the Purchase Agreement, its 3.750% Sustainability-Linked Senior
Notes due 2029 (the “Securities”) to be guaranteed on an unsecured, unsubordinated basis by Level 3 Parent. The obligation of the Purchasers to purchase the Securities is conditioned on, among other things, the execution and
delivery by Level 3 Parent, the Issuer and Level 3 LLC of a subordination agreement in the form hereof. Additionally, upon the incurrence of certain intercompany indebtedness, the Indenture requires Issuer Restricted Subsidiaries that
incur such type of indebtedness to guarantee the Offering Proceeds Note (each such guarantee, an “Offering Proceeds Note Guarantee”, and each such Issuer Restricted Subsidiary that provides such a guarantee, an “Offering
Proceeds Note Guarantor”) and to subordinate their obligations with respect to such newly incurred indebtedness to their obligations with respect to their Offering Proceeds Note Guarantee. Offering Proceeds Note Guarantors required to
provide subordination with respect to intercompany indebtedness and the creditors on such indebtedness are required to become parties to this Agreement, if they are not yet parties. In order to induce the Purchasers to purchase the Securities,
Level 3 Parent, the Issuer and Level 3 LLC are willing to execute and deliver this Agreement. Accordingly, Level 3 Parent, as a Subordinated Lender, the Issuer and Level 3 LLC, as a Subordinated Borrower, hereby agree as follows:

 ARTICLE I 
 Subordination

 SECTION 1.1. Subordination. Each Subordinated Lender hereby agrees that all obligations in respect of any Debt owed to such
Subordinated Lender by any Subordinated Borrower, 







 
including the payment of principal, premium (if any), interest, Guarantees or all other amounts payable thereunder (the “Subordinated Obligations”), are subordinate and junior in
right of payment, to the extent and in the manner provided in this Article I, to the prior payment in full in cash of all obligations of such Subordinated Borrower in respect of the Offering Proceeds Note, including the payment of principal,
premium (if any), interest (including interest arising after the commencement of a bankruptcy or other proceeding, whether or not such a claim is permitted in such proceeding), Offering Proceeds Note Guarantees thereof or all other amounts payable
thereunder (the “Senior Obligations”). 
 SECTION 1.2. Subordination in the Event of Dissolution or Insolvency of any
Subordinated Borrower. Subject to the terms of a subordination agreement entered into pursuant to Section 4.14, upon any distribution of the assets of any Subordinated Borrower in connection with its dissolution or insolvency or upon any
dissolution, winding up, liquidation or reorganization of any Subordinated Borrower, whether in bankruptcy, insolvency, reorganization, arrangement or receivership or similar proceedings, or upon any assignment for the benefit of creditors or any
other marshaling of the assets and liabilities of any Subordinated Borrower: 
 (a) the Issuer shall first be entitled to receive payment in
full in cash of the Senior Obligations of such Subordinated Borrower in accordance with the terms of such Senior Obligations before any Subordinated Lender shall be entitled to receive any payment on account of the Subordinated Obligations owed by
such Subordinated Borrower to such Subordinated Lender, whether as principal, premium (if any), interest, pursuant to an Offering Proceeds Note Guarantee or otherwise; and 

(b) any payment by, or distribution of the assets of, such Subordinated Borrower of any kind or character, whether in cash, property or
securities, to which any Subordinated Lender would be entitled except for the provisions of this Agreement shall be paid or delivered by the Person making such payment or distribution (whether a trustee in bankruptcy, a receiver, custodian or
liquidating trustee or otherwise) directly to the Issuer to the extent necessary to make payment in full in cash of all Senior Obligations remaining unpaid, after giving effect to any concurrent payment or distribution to the Issuer in respect of
the Senior Obligations. 
 In the event of any proceeding involving any Subordinated Borrower under any bankruptcy, insolvency, reorganization, receivership
or similar law, each Subordinated Lender agrees, until the indefeasible payment in full of all monetary Senior Obligations, not to ask, demand, sue for or take or receive from any Subordinated Borrower in cash, securities or other property or by
setoff, purchase or redemption (including, without limitation, from or by way of collateral), payment of all or any part of the Subordinated Obligations owed to such Subordinated Lender (other than payments permitted pursuant to clause
(b) above) and agrees that in connection with any proceeding involving any Subordinated Borrower under any bankruptcy, insolvency, reorganization, receivership or similar law (i) the Issuer is irrevocably authorized and empowered (in its
own name or in the name of such Subordinated Borrower or otherwise), but shall have no obligation, to demand, sue for, collect and receive every payment or distribution referred to in the preceding sentence and give acquittance therefor and to file
claims and proofs of claim and take such other action (including, without limitation, voting the applicable Subordinated Obligations and enforcing any security interest or other lien securing payment of such Subordinated Obligations) as the Issuer
may deem necessary or advisable for the exercise or enforcement of any of its rights or interests and (ii) each Subordinated Lender shall duly and promptly take such action as the Issuer may reasonably request to (A) collect amounts in
respect of the applicable Subordinated Obligations for the account of the Issuer and to file appropriate claims or proofs of claim in respect of such Subordinated Obligations, (B) 

  
 C-2 








 
execute and deliver to the Issuer such irrevocable powers of attorney, assignments or other instruments as the Issuer may reasonably request in order to enable the Issuer to enforce any and all
claims with respect to, and any security interests and other liens securing payment of, the applicable Subordinated Obligations and (C) collect and receive any and all payments or distributions which may be payable or deliverable upon or with
respect to the applicable Subordinated Obligations. A copy of this Agreement may be filed with any court as evidence of the Issuer’s right, power and authority hereunder. 

SECTION 1.3. Certain Payments Held in Trust. Subject to the terms of a subordination agreement entered into pursuant to
Section 4.14, in the event that any payment by, or distribution of the assets of, any Subordinated Borrower of any kind or character, whether in cash, property or securities, and whether directly or otherwise, shall be received by or on behalf
of any Subordinated Lender at a time when such payment is prohibited by this Agreement, such payment or distribution shall be held in trust for the benefit of, and shall be paid over to, the Issuer to the extent necessary to make payment in full in
cash of all Senior Obligations remaining unpaid, after giving effect to any concurrent payment or distribution to the Issuer in respect of such Senior Obligations. 

SECTION 1.4. Subrogation. Subject to the prior indefeasible payment in full in cash of the Senior Obligations, each Subordinated Lender
shall be subrogated to the rights of the Issuer to receive payments or distributions in cash, property or securities of each applicable Subordinated Borrower in respect of the Senior Obligations until all amounts owing on the applicable Subordinated
Obligations shall be paid in full, and as between and among a Subordinated Borrower, its creditors (other than the Issuer) and the applicable Subordinated Lender, no such payment or distribution made to the Issuer by virtue of this Agreement that
otherwise would have been made to such Subordinated Lender shall be deemed to be a payment by such Subordinated Borrower on account of such Subordinated Obligations, it being understood that the provisions of this Agreement are intended solely for
the purpose of defining the relative rights of the Subordinated Lenders, on the one hand, and the Issuer, on the other hand. 
 ARTICLE II

 Other Matters Regarding the Subordinated Obligations 

SECTION 2.1. Other Creditors. Except in the limited circumstances set forth in Article I, nothing contained in this Agreement is
intended to or shall impair, as between and among a Subordinated Borrower, its creditors and any Subordinated Lender, the obligations of such Subordinated Borrower to pay to such Subordinated Lender the Subordinated Obligations of such Subordinated
Borrower as and when the same shall become payable in accordance with the terms thereof, or affect the relative rights of such Subordinated Lender and the other creditors of such Subordinated Borrower. 

SECTION 2.2. Proofs of Claims. In the event of any dissolution, winding up, liquidation or reorganization of any Subordinated Borrower,
whether in bankruptcy, insolvency, reorganization, arrangement or receivership proceedings or otherwise, or any assignment for the benefit of creditors or any other marshaling of the assets and liabilities of any Subordinated Borrower, each
Subordinated Lender agrees to file proofs of claim for the Subordinated Obligations owed to it upon demand of the Issuer, in default of which the Issuer or an authorized representative of the Issuer is hereby irrevocably authorized so to file in
order to effectuate the provisions hereof. This Section shall not be construed to permit any Subordinated Lender to retain any payment received by it in respect of a Subordinated Obligation that such Subordinated Lender is not entitled to receive
and retain under any other provision of this Agreement. 

  
 C-3 








 SECTION 2.3. Waivers. (a) Each Subordinated Lender waives the right to compel any
assets or property of any Subordinated Borrower or the assets or property of any Offering Proceeds Note Guarantor or any other Person to be applied in any particular order to discharge the Senior Obligations. Each Subordinated Lender expressly
waives the right to require the Issuer to proceed against any Subordinated Borrower, any Offering Proceeds Note Guarantor or any other Person, or to pursue any other remedy in the Issuer’s power which such Subordinated Lender cannot pursue and
which would lighten such Subordinated Lender’s burden, notwithstanding that the failure of the Issuer to do so may thereby prejudice such Subordinated Lender. Each Subordinated Lender agrees that it shall not be discharged, exonerated or have
its obligations hereunder to the Issuer reduced (i) by the Issuer’s delay in proceeding against or enforcing any remedy against any Subordinated Borrower, any Offering Proceeds Note Guarantor or any other Person; (ii) by the Issuer
releasing any Subordinated Borrower, any Offering Proceeds Note Guarantor or any other Person from all or any part of the Senior Obligations; or (iii) by the discharge of any Subordinated Borrower, any Offering Proceeds Note Guarantor or any
other Person by an operation of law or otherwise, with or without the intervention or omission of the Issuer, except in each case unless all Senior Obligations due to the Issuer have been indefeasibly paid in full in cash. The Issuer’s vote to
accept or reject any plan of reorganization relating to any Subordinated Borrower, any Offering Proceeds Note Guarantor or any other Person, or the Issuer’s receipt on account of all or part of the Senior Obligations of any cash, securities or
other property distributed in any bankruptcy, reorganization, or insolvency case, shall not discharge, exonerate, or reduce the obligations of any Subordinated Lender hereunder to the Issuer, except in each case unless all Senior Obligations have
been indefeasibly paid in full in cash. 
 (b) Each Subordinated Lender waives all rights and defenses arising out of an election of
remedies by the Issuer, even though that election of remedies, including, without limitation, any nonjudicial foreclosure with respect to security for the Senior Obligations, has impaired the value of such Subordinated Lender’s rights of
subrogation, reimbursement, or contribution against any Subordinated Borrower, any Offering Proceeds Note Guarantor or any other Person. Each Subordinated Lender expressly waives any rights or defenses it may have by reason of protection afforded to
any Subordinated Borrower, any Offering Proceeds Note Guarantor or any other Person with respect to the Senior Obligations pursuant to any anti-deficiency laws or other laws of similar import which limit or discharge the principal debtor’s
indebtedness upon judicial or nonjudicial foreclosure of real property or personal property collateral for the Senior Obligations, if any. 

(c) Each Subordinated Lender agrees that, without the necessity of any reservation of rights against it, and without notice to or further
assent by it, any demand for payment of the Senior Obligations made by the Issuer may be rescinded in whole or in part by the Issuer, and any Senior Obligation may be continued, and the Senior Obligations, or the liability of any Subordinated
Borrower or any Offering Proceeds Note Guarantor or any other party upon or for any part thereof, or any Guarantee therefor or right of offset with respect thereto, may, from time to time, in whole or in part, be renewed, extended, modified,
accelerated, compromised, waived, surrendered, or released by the Issuer, in each case without notice to or further assent by such Subordinated Lender, which will remain bound under this Agreement and without impairing, abridging, releasing or
affecting the subordination and other agreements provided for herein. 
 (d) Each Subordinated Lender waives any and all notice of the
creation, renewal, extension or accrual of any of the Senior Obligations and notice of or proof of reliance by the Issuer upon this Agreement. The Senior Obligations, and any of them, shall be deemed conclusively to have been created,


  
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contracted or incurred in reliance upon this Agreement, and all dealings between any Subordinated Borrower and the Issuer shall be deemed to have been consummated in reliance upon this Agreement.
Each Subordinated Lender acknowledges and agrees that the Issuer has relied upon the subordination and other agreements provided for herein in consenting to this Agreement. Each Subordinated Lender waives notice of or proof of reliance on this
Agreement and protest, demand for payment and notice of default. 
 SECTION 2.4. Legend. Any and all instruments or records now or
hereafter creating or evidencing the Subordinated Obligations, whether upon refunding, extension, renewal, refinancing, replacement or otherwise, shall contain the following legend: 

“Notwithstanding anything contained herein to the contrary, neither the principal of nor the interest on,
nor any other amounts payable in respect of, the indebtedness created or evidenced by this instrument or record shall become due or be paid or payable, except to the extent permitted under the Parent Intercompany Note Subordination Agreement dated
as of January 13, 2021, among Level 3 Parent, LLC, [any additional Subordinated Lenders,] Level 3 Communications, LLC[, any additional Subordinated Borrowers] and Level 3 Financing, Inc., which Parent Intercompany Note
Subordination Agreement is incorporated herein with the same effect as if fully set forth herein.” 
 SECTION 2.5. Transfer of
Subordinated Obligations. Each Subordinated Lender agrees that it will not sell, assign, transfer or otherwise dispose of all or any part of the Subordinated Obligations owed to it unless the Person to whom such sale, assignment, transfer or
disposition is made shall acknowledge in writing (delivered to the Issuer and the Purchasers) that it shall be bound by the terms of this Agreement to the same extent as such Subordinated Lender, including the terms of this Section 2.5, as
though it is a party hereto as of the date hereof. 
 SECTION 2.6. Obligations Hereunder Not Affected. (a) All rights and
interests of the Issuer hereunder, and all agreements and obligations of each Subordinated Lender hereunder, shall remain in full force and effect irrespective of: 

(i)    any lack of validity or enforceability of the Offering Proceeds Note, the Purchase Agreement or any
document contemplated thereby; 
 (ii)    any change in the time, manner or place of payment of, or in
any other term of, all or any of the Senior Obligations, or any other amendment or waiver of or consent to departure from the Offering Proceeds Note; 

(iii)    any release, amendment, waiver or other modification, whether in writing or by course of conduct
or otherwise, of, or consent to departure from, any Offering Proceeds Note Guarantee; or 
 (iv)    any
other circumstance that might otherwise constitute a defense available to, or a discharge of, any Subordinated Borrower in respect of its Senior Obligations or of any Subordinated Lender in respect of this Agreement. 

(b) This Agreement shall continue to be effective or be reinstated, as the case may be, if at any time any payment of the Senior Obligations
or any part thereof is rescinded or must otherwise be 

  
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returned by the Issuer upon the insolvency, bankruptcy or reorganization of any Subordinated Borrower or otherwise, all as though such payment had not been made. 

ARTICLE III 
 Representations
and Warranties of the Subordinated Lenders 
 Each Subordinated Lender represents and warrants to the Issuer that: 

(a) It is duly organized, validly existing and in good standing under the laws of the jurisdiction in which it is organized. 

(b) The execution, delivery and performance by it of this Agreement and the consummation of the transactions contemplated hereby are within
its powers, have been duly authorized by all necessary action on its part, require no action by or in respect of, or filing with, any court or governmental or regulatory body or agency (other than such as have been duly taken or made) and do not
contravene, or constitute a default under, any provision of applicable law or regulation or of its certificate of incorporation or by-laws (or other organizational documents, as applicable) or of any material
agreement, judgment, injunction, order, decree or other instrument binding upon it or any of its subsidiaries. 
 (c) This Agreement
constitutes a valid and binding agreement of such Subordinated Lender, enforceable against such Subordinated Lender in accordance with its terms, subject to the effect of applicable bankruptcy, insolvency or similar laws affecting creditors’
rights generally and equitable principles of general applicability. 
 ARTICLE IV 

Miscellaneous 
 SECTION
4.1. Notices. All communications and notices hereunder shall be in writing and shall be mailed (physical or electronic) or delivered and sent by fax and confirmed at 100 CenturyLink Drive, Monroe, Louisiana 71203, Attention: General Counsel
and to 1025 Eldorado Boulevard, Broomfield, CO 80021, Attention: Treasury department, with a copy in like manner to Bank of America, N.A., 222 Broadway, 14th Floor, New York, New York 10038,
Attention of Don Pinzon (Telecopy No. 212-901-7843; Telephone Confirm 646-556-3280).

 SECTION 4.2. Successors and Assigns. Whenever in this Agreement any of the parties hereto is referred to, such reference shall be
deemed to include the successors and assigns of such party. All representations, warranties, covenants, promises and agreements by or on behalf of each Subordinated Lender and each Subordinated Borrower that are contained in this Agreement shall
bind its successors and assigns and inure to the benefit of the Issuer and the successors and assigns of the Issuer. Each Subordinated Lender and each Subordinated Borrower agrees that it shall not assign or delegate any of its obligations under
this Agreement without the prior written consent of the Issuer, and any attempted assignment or delegation without such consent shall be void and of no effect. 

SECTION 4.3. Governing Law; Jurisdiction; Consent to Service of Process. (a)    THIS AGREEMENT SHALL BE GOVERNED
BY, AND CONSTRUED IN ACCORDANCE WITH,  

  
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THE LAWS OF THE STATE OF NEW YORK BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE
REQUIRED THEREBY. 
 (b) Each Subordinated Lender hereby irrevocably and unconditionally submits, for itself and its property, to the
nonexclusive jurisdiction of the Supreme Court of the State of New York sitting in New York County and of the United States District Court of the Southern District of New York, and any appellate court from any thereof, in any action or proceeding
arising out of or relating to this Agreement, or for recognition or enforcement of any judgment, and each of the parties hereto hereby irrevocably and unconditionally agrees that all claims in respect of any such action or proceeding may be heard
and determined in such New York State or, to the extent permitted by law, in such Federal court. Each of the parties hereto agrees that a final judgment in any such action or proceeding shall be conclusive and may be enforced in other jurisdictions
by suit on the judgment or in any other manner provided by law. Nothing in this Agreement shall affect any right that the Issuer may otherwise have to bring any action or proceeding relating to this Agreement against any Subordinated Lender or its
properties in the courts of any jurisdiction. 
 (c) Each Subordinated Lender hereby irrevocably and unconditionally waives, to the fullest
extent it may legally and effectively do so, any objection which it may now or hereafter have to the laying of venue of any suit, action or proceeding arising out of or relating to this Agreement in any court referred to in paragraph (b) of
this Section. Each of the parties hereto hereby irrevocably waives, to the fullest extent permitted by law, the defense of an inconvenient forum to the maintenance of such action or proceeding in any such court. 

(d) Each Subordinated Lender hereby irrevocably consents to service of process in the manner provided for notices in Section 4.1 hereto.
Nothing in this Agreement will affect the right of any party to this Agreement to serve process in any other manner permitted by law. 

SECTION 4.4. Waivers; Amendment. No failure or delay of the Issuer in exercising any right or power hereunder shall operate as a waiver
thereof, nor shall any single or partial exercise of any such right or power by the Issuer preclude any other or further exercise thereof or the exercise of any other right or power. The rights and remedies of the Issuer hereunder and instruments
creating or securing its respective Senior Obligations are cumulative and are not exclusive of any other rights or remedies provided by law. Neither this Agreement nor any provision hereof may be waived, amended or modified except (i) in
accordance with Section 913 of the Indenture and (ii) pursuant to an agreement or agreements in writing entered into by the Issuer, each Subordinated Lender and each Subordinated Borrower intending to be bound thereby. 

SECTION 4.5. Waiver of Claims. (a) To the maximum extent permitted by law, each Subordinated Lender waives any claim it might have
against the Issuer with respect to, or arising out of, any action or failure to act or any error of judgment, negligence, or mistake or oversight whatsoever on the part of the Issuer or its directors, officers, employees, agents or affiliates with
respect to any exercise of rights or remedies under the Offering Proceeds Note. Neither the Issuer nor any of its respective directors, officers, employees, agents or affiliates shall be liable for failure to demand, collect or realize upon any
Offering Proceeds Note Guarantee or for any delay in doing so or shall be under any obligation to take any other action whatsoever with regard to the Offering Proceeds Note or any part thereof. 

  
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 (b) Each Subordinated Lender, for itself and on behalf of its successors and assigns, hereby
waives any and all now existing or hereafter arising rights it may have to require the Issuer to marshal assets for the benefit of such Subordinated Lender, or to otherwise direct the timing, order or manner of any enforcement of the Offering
Proceeds Note. The Issuer is under no duty or obligation, and each Subordinated Lender hereby waives any right it may have to compel the Issuer, to pursue any Offering Proceeds Note Guarantor or other Person who may be liable for the Senior
Obligations. 
 (c) Each Subordinated Lender hereby waives and releases all rights which a guarantor or surety with respect to the Senior
Obligations could exercise. 
 (d) Each Subordinated Lender hereby waives any duty on the part of the Issuer to disclose to it any fact
known or hereafter known by the Issuer relating to the operation or financial condition of any Subordinated Borrower or any Offering Proceeds Note Guarantor, or their respective businesses. Each Subordinated Lender enters into this Agreement based
solely upon its independent knowledge of the applicable Subordinated Borrower’s results of operations, financial condition and business and such Subordinated Lender assumes full responsibility for obtaining any further or future information
with respect to the applicable Subordinated Borrower or its results of operations, financial condition or business. 
 SECTION 4.6.
Further Assurances. Each Subordinated Lender and each Subordinated Borrower, at its own expense and at any time from time to time, upon the written request of the Issuer, will promptly and duly execute and deliver such further instruments and
documents and take such further actions as the Issuer reasonably may request for the purposes of obtaining or preserving the full benefits of this Agreement and of the rights and powers herein granted. 

SECTION 4.7. Provisions Define Relative Rights. This Agreement is intended solely for the purpose of defining the relative rights of
the Issuer on the one hand and the Subordinated Lenders and the Subordinated Borrowers on the other, and no other Person shall have any right, benefit or other interest under this Agreement. 

SECTION 4.8. WAIVER OF JURY TRIAL. EACH PARTY HERETO HEREBY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT
MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY). EACH PARTY HERETO
(A) CERTIFIES THAT NO REPRESENTATIVE OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND
(B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION. 

SECTION 4.9. Severability. In the event any one or more of the provisions contained in this Agreement should be held invalid, illegal
or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein shall not in any way be affected or impaired thereby. The parties shall endeavor in good faith negotiations to replace any
invalid, illegal or unenforceable provisions with valid provisions the economic effect of which comes as close as possible to that of the invalid, illegal or unenforceable provisions. 

  
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 SECTION 4.10. Counterparts. This Agreement may be executed in two or more counterparts,
each of which shall constitute an original but all of which, when taken together, shall constitute but one instrument. 
 SECTION 4.11.
Headings. Article and Section headings used herein are for convenience of reference only, are not part of this Agreement and are not to affect the construction of, or to be taken into consideration in interpreting, this Agreement. 

SECTION 4.12. Additional Subordinated Borrowers. Pursuant to clause (iv) of paragraph (b) of Section 908 of the
Indenture or the corresponding provision of paragraph (b) of Section 909 of the Indenture, upon execution and delivery by any Issuer Restricted Subsidiary of an instrument in the form of Annex I attached hereto or otherwise in a form
acceptable to the Issuer, such Issuer Restricted Subsidiary shall become a Subordinated Borrower hereunder with the same force and effect as if originally named as a Subordinated Borrower herein. The execution and delivery of any such instrument
shall not require the consent of any other Subordinated Borrower hereunder. The rights and obligations of each Subordinated Borrower herein shall remain in full force and effect notwithstanding the addition of any Subordinated Borrower as a party to
this Agreement. 
 SECTION 4.13. Additional Subordinated Lenders. Pursuant to clause (iv) of paragraph (b) of
Section 908 of the Indenture or the corresponding provision of paragraph (b) of Section 909 of the Indenture or both such clauses, upon execution and delivery by any Issuer Restricted Subsidiary of an instrument in the form of Annex
II attached hereto or otherwise in a form acceptable to the Issuer, such Issuer Restricted Subsidiary shall become a Subordinated Lender hereunder with the same force and effect as if originally named as a Subordinated Lender herein. The execution
and delivery of any such instrument shall not require the consent of any other Subordinated Lender hereunder. The rights and obligations of each Subordinated Lender herein shall remain in full force and effect notwithstanding the addition of any
Subordinated Lender as a party to this Agreement. 
 SECTION 4.14. Subordination of Senior Obligations to Qualified Credit Facility.
The Issuer, a Subordinated Borrower and the Subordinated Lenders may enter into an agreement or arrangement that provides that the payment obligation on the Senior Obligations of such Subordinated Borrower be expressly subordinated in any
bankruptcy, liquidation or winding up proceeding of such Subordinated Borrower to the prior payment in full in cash of all obligations of such Subordinated Borrower under any Guarantee of, or obligation as borrower under, any Qualified Credit
Facility Incurred by the Issuer or any Issuer Restricted Subsidiary in accordance with clause (ii) of paragraph (b) of Section 908 or the corresponding provision of paragraph (b) of Section 909 of the Indenture;
provided, however, that (x) the terms of the subordination of such Senior Obligations of such Subordinated Borrower, to any such Guarantee of or obligation as borrower under a Qualified Credit Facility may not eliminate or
otherwise adversely affect the subordination of the payment obligation on any other Debt of such Subordinated Borrower, to the payment obligation of the Senior Obligations of such Subordinated Borrower, and (y) any Guarantee (other than a
Guarantee of such Qualified Credit Facility) by such Subordinated Borrower of any other Debt of the Issuer or any Issuer Restricted Subsidiary also shall be expressly subordinated in any bankruptcy, liquidation or winding up proceeding of such
Subordinated Borrower, to the prior payment in full in cash of all obligations of such Subordinated Borrower under its 

  
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Guarantee of such Qualified Credit Facility to at least the same extent and on the same terms and conditions as the subordination provisions applicable to the Senior Obligations of such
Subordinated Borrower. 
 [Remainder of this page intentionally left blank] 

  
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 IN WITNESS WHEREOF, Level 3 LLC, as a Subordinated Borrower, Level 3 Parent, as a
Subordinated Lender and the Issuer have caused this Agreement to be duly executed by their respective authorized representatives as of the day and year first above written. 

 

			
	LEVEL 3 COMMUNICATIONS, LLC,
		
	    By	 	  

		 	 Name:
 Title:



  

			
	LEVEL 3 PARENT, LLC,
		
	    By	 	  

		 	 Name:
 Title:



  

			
	LEVEL 3 FINANCING, INC.,
		
	    By	 	  

		 	 Name:
 Title:




  
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 Annex I to the Parent Intercompany 

Note Subordination Agreement 

SUPPLEMENT NO. [    ] dated as of
[                ] to the Parent Intercompany Note Subordination Agreement dated as of January 13, 2021 (the “Parent Intercompany Note Subordination
Agreement”), among LEVEL 3 COMMUNICATIONS, LLC (“Level 3 LLC”), each Issuer Restricted Subsidiary becoming a party thereto pursuant to Section 4.12 thereof (each such Issuer Restricted
Subsidiary and Level 3 LLC, a “Subordinated Borrower”), LEVEL 3 PARENT, LLC (“Level 3 Parent”), each Issuer Restricted Subsidiary becoming a party thereto pursuant to Section 4.13
thereof (each such Issuer Restricted Subsidiary and Level 3 Parent, a “Subordinated Lender”) and LEVEL 3 FINANCING, INC. (the “Issuer”). 

Reference is made to the Parent Intercompany Note Subordination Agreement. 

Capitalized terms used herein and not otherwise defined herein shall have the meanings assigned to such terms in the Parent Intercompany Note
Subordination Agreement. 
 Pursuant to clause (iv) of paragraph (b) of Section 908 of the Indenture or the corresponding
provision of paragraph (b) of Section 909 of the Indenture, as applicable, an Issuer Restricted Subsidiary is allowed to incur Debt from Level 3 Parent or an Issuer Restricted Subsidiary provided that (i) such Issuer Restricted
Subsidiary is a Guarantor and an Offering Proceeds Note Guarantor and (ii) such Debt is expressly subordinated in any bankruptcy, liquidation or winding up proceeding of such Issuer Restricted Subsidiary to such Issuer Restricted
Subsidiary’s Offering Proceeds Note Guarantee. Section 4.12 of the Parent Intercompany Note Subordination Agreement provides that an Issuer Restricted Subsidiary may become a Subordinated Borrower under the Parent Intercompany Note
Subordination Agreement by execution and delivery of an instrument in the form of this Supplement. The undersigned Issuer Restricted Subsidiary (the “New Subordinated Borrower”) is executing this Supplement to become a Subordinated
Borrower under the Parent Intercompany Note Subordination Agreement in order to comply with the terms of the Indenture and as consideration for amounts previously advanced to the Issuer under the Indenture. 

Accordingly, the New Subordinated Borrower agrees as follows: 

In accordance with Section 4.12 of the Parent Intercompany Note Subordination Agreement, the New Subordinated Borrower by its signature
below becomes a Subordinated Borrower under the Parent Intercompany Note Subordination Agreement with the same force and effect as if originally named therein as a Subordinated Borrower and the New Subordinated Borrower hereby agrees to all the
terms and provisions of the Parent Intercompany Note Subordination Agreement applicable to it as a Subordinated Borrower thereunder. Each reference to a “Subordinated Borrower” in the Parent Intercompany Note Subordination Agreement
shall be deemed to include the New Subordinated Borrower. The Parent Intercompany Note Subordination Agreement is hereby incorporated herein by reference. 







 The New Subordinated Borrower represents and warrants to the Issuer that this Supplement has been
duly authorized, executed and delivered by it and constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms, subject to applicable bankruptcy, insolvency, moratorium or other laws affecting
creditors’ rights generally and subject to general principles of equity regardless of whether considered in a proceeding in equity or at law. 

This Supplement may be executed in counterparts, each of which shall constitute an original, but all of which, when taken together, shall
constitute a single contract. This Supplement shall become effective when the Issuer shall have received counterparts of this Supplement that, when taken together, bear the signatures of the New Subordinated Borrower and the Issuer. Delivery of an
executed signature page to this Supplement by facsimile transmission shall be as effective as delivery of a manually executed counterpart of this Supplement. 

Except as expressly supplemented hereby and pursuant to any other supplement contemplated by Section 4.12 or 4.13 of the Parent
Intercompany Note Subordination Agreement, the Parent Intercompany Note Subordination Agreement shall remain in full force and effect. 

THIS SUPPLEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK BUT WITHOUT GIVING EFFECT TO
APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

In the event any one or more of the provisions contained in this Supplement should be held invalid, illegal or unenforceable in any respect,
the validity, legality and enforceability of the remaining provisions contained herein shall not in any way be affected or impaired thereby. The parties shall endeavor in good faith negotiations to replace any invalid, illegal or unenforceable
provisions with valid provisions the economic effect of which comes as close as possible to that of the invalid, illegal or unenforceable provisions. 

All communications and notices hereunder shall be in writing and given as provided in Section 4.1 of the Parent Intercompany Note
Subordination Agreement. All communications and notices hereunder to the New Subordinated Borrower shall be given to it at the address set forth under its signature below. 

[Remainder of this page intentionally left blank] 







 IN WITNESS WHEREOF, the New Subordinated Borrower and the Issuer have duly executed this Supplement to the Parent
Intercompany Note Subordination Agreement as of the day and year first above written. 
  

			
	 [NAME OF NEW SUBORDINATED

BORROWER],

		
	    By	 	  

		 	 Name:
 Title:



  

			
	LEVEL 3 FINANCING, INC.,
		
	    By	 	  

		 	 Name:
 Title:




  
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 Annex II to the Parent Intercompany 

Note Subordination Agreement 

SUPPLEMENT NO. [    ] dated as of
[                ] to the Parent Intercompany Note Subordination Agreement dated as of January 13, 2021 (the “Parent Intercompany Note Subordination
Agreement”), among LEVEL 3 COMMUNICATIONS, LLC (“Level 3 LLC”), each Issuer Restricted Subsidiary becoming a party thereto pursuant to Section 4.12 thereof (each such Issuer Restricted
Subsidiary and Level 3 LLC, a “Subordinated Borrower”), LEVEL 3 PARENT, LLC (“Level 3 Parent”), each Issuer Restricted Subsidiary becoming a party thereto pursuant to Section 4.13
thereof (each such Issuer Restricted Subsidiary and Level 3 Parent, a “Subordinated Lender” and, collectively, the “Subordinated Lenders”) and LEVEL 3 FINANCING, INC. (the “Issuer”). 

Reference is made to the Parent Intercompany Note Subordination Agreement. 

Capitalized terms used herein and not otherwise defined herein shall have the meanings assigned to such terms in the Parent Intercompany Note
Subordination Agreement. 
 Pursuant to clause (iv) of paragraph (b) of Section 908 of the Indenture or the corresponding
provision of paragraph (b) of Section 909 of the Indenture, as applicable, an Issuer Restricted Subsidiary is allowed to incur Debt from Level 3 Parent or an Issuer Restricted Subsidiary provided that (i) such Issuer Restricted
Subsidiary is a Guarantor and an Offering Proceeds Note Guarantor and (ii) such Debt is subordinated in any bankruptcy, liquidation or winding up proceeding of such Issuer Restricted Subsidiary to such Issuer Restricted Subsidiary’s
Offering Proceeds Note Guarantee. Section 4.13 of the Parent Intercompany Note Subordination Agreement provides that an Issuer Restricted Subsidiary may become a Subordinated Lender under the Parent Intercompany Note Subordination Agreement by
execution and delivery of an instrument in the form of this Supplement. The undersigned Issuer Restricted Subsidiary (the “New Subordinated Lender”) is executing this Supplement to become a Subordinated Lender under the Parent
Intercompany Note Subordination Agreement in order to comply with the terms of the Indenture and as consideration for amounts previously advanced to the Issuer under the Indenture. 

Accordingly, the New Subordinated Lender agrees as follows: 

In accordance with Section 4.13 of the Parent Intercompany Note Subordination Agreement, the New Subordinated Lender by its signature
below becomes a Subordinated Lender under the Parent Intercompany Note Subordination Agreement with the same force and effect as if originally named therein as a Subordinated Lender and the New Subordinated Lender hereby (a) agrees to all the
terms and provisions of the Parent Intercompany Note Subordination Agreement applicable to it as a Subordinated Lender thereunder and (b) represents and warrants that the representations and warranties made by it as a Subordinated Lender
thereunder are true and correct on and as of the date hereof. Each reference to a “Subordinated Lender” in the Parent Intercompany Note Subordination Agreement shall be deemed to include the New Subordinated Lender. The Parent
Intercompany Note Subordination Agreement is hereby incorporated herein by reference. 
 The New Subordinated Lender represents and warrants
to the Issuer that this Supplement has been duly authorized, executed and delivered by it and constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms, subject to applicable bankruptcy, insolvency,
moratorium or other laws affecting creditors’ rights generally and subject to general principles of equity regardless of whether considered in a proceeding in equity or at law. 







 This Supplement may be executed in counterparts, each of which shall constitute an original, but
all of which, when taken together, shall constitute a single contract. This Supplement shall become effective when the Issuer shall have received counterparts of this Supplement that, when taken together, bear the signatures of the New Subordinated
Lender and the Issuer. Delivery of an executed signature page to this Supplement by facsimile transmission shall be as effective as delivery of a manually executed counterpart of this Supplement. 

Except as expressly supplemented hereby and pursuant to any other supplement contemplated by Section 4.12 or 4.13 of the Parent
Intercompany Note Subordination Agreement, the Parent Intercompany Note Subordination Agreement shall remain in full force and effect. 

THIS SUPPLEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK BUT WITHOUT GIVING EFFECT TO
APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

In the event any one or more of the provisions contained in this Supplement should be held invalid, illegal or unenforceable in any respect,
the validity, legality and enforceability of the remaining provisions contained herein shall not in any way be affected or impaired thereby. The parties shall endeavor in good faith negotiations to replace any invalid, illegal or unenforceable
provisions with valid provisions the economic effect of which comes as close as possible to that of the invalid, illegal or unenforceable provisions. 

All communications and notices hereunder shall be in writing and given as provided in Section 4.1 of the Parent Intercompany Note
Subordination Agreement. All communications and notices hereunder to the New Subordinated Lender shall be given to it at the address set forth under its signature below. 

[Remainder of this page intentionally left blank] 

  
 2 








 IN WITNESS WHEREOF, the New Subordinated Lender and the Issuer have duly executed this Supplement
to the Parent Intercompany Note Subordination Agreement as of the day and year first above written. 
  

			
	 [NAME OF NEW SUBORDINATED

LENDER]

		
	    By	 	  

		 	 Name:
 Title:



  

			
	LEVEL 3 FINANCING, INC.,
		
	    By	 	  

		 	 Name:
 Title:




  
 3 








 EXHIBIT D 

OFFERING PROCEEDS NOTE GUARANTEE AGREEMENT (this “Agreement”) dated as of
[                ], between [OFFERING PROCEEDS NOTE GUARANTOR] (the “Offering Proceeds Note Guarantor”), a subsidiary of Level 3 Financing, Inc.,
and LEVEL 3 FINANCING, INC. (the “Issuer”). 
 W I T N E S S E T H : 

WHEREAS Level 3 Communications, LLC (“Level 3 LLC”) has heretofore executed and delivered to
Level 3 Financing, Inc. (the “Issuer”) an intercompany demand note in an initial principal amount equal to $900,000,000, as it may be amended from time to time pursuant to Sections 301 and 913 of the Indenture (as defined
below) (the “Offering Proceeds Note”). 
 WHEREAS the Issuer has heretofore executed and delivered to The Bank of New York
Mellon Trust Company, N.A., as trustee, an Indenture dated as of January 13, 2021 (the “Indenture”; capitalized terms used but not defined herein having the meanings assigned thereto in the Indenture), providing for the
issuance of its 3.750% Sustainability-Linked Senior Notes due 2029 (the “Securities”); 
 WHEREAS the Indenture permits the
Offering Proceeds Note Guarantor to incur certain Debt provided, among other things, that such Offering Proceeds Note Guarantor execute and deliver to the Issuer a Guarantee pursuant to which the Offering Proceeds Note Guarantor shall
unconditionally guarantee all Level 3 LLC’s obligations under the Offering Proceeds Note pursuant to a Guarantee on the terms and conditions set forth herein; and 

WHEREAS the Guarantee contained in this Guarantee Agreement shall constitute an “Offering Proceeds Note Guarantee” for all
purposes of the Indenture. 
 NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of
which is hereby acknowledged, the Offering Proceeds Note Guarantor and the Issuer mutually covenant and agree for the equal and ratable benefit of the Issuer as follows: 

ARTICLE I 
 Offering Proceeds
Note Guarantee 
 SECTION 1.01. Guarantees. Subject to a subordination agreement entered into pursuant to Section 1.03, the
Offering Proceeds Note Guarantor hereby unconditionally guarantees to the Issuer and its successors and assigns (a) the full and punctual payment in cash of all obligations of Level 3 LLC in respect of the Offering Proceeds Note, including
the payment of principal, premium (if any), interest (including interest arising after the commencement of a bankruptcy or other proceeding, whether or not such a claim is permitted in such proceeding) or any other amount payable thereunder (the
“Obligations”). The Offering Proceeds Note Guarantor further agrees that the Obligations may be extended or renewed, in whole or in part, without notice or further assent from the Offering Proceeds Note Guarantor and that the
Offering Proceeds Note Guarantor will remain bound under this Agreement notwithstanding any extension or renewal of the Obligations. 







 The Offering Proceeds Note Guarantor waives presentation to, demand of, payment from and protest
to Level 3 LLC of any of the Obligations and also waives notice of protest for nonpayment. The Offering Proceeds Note Guarantor waives notice of any default under the Obligations. The obligations of the Offering Proceeds Note Guarantor
hereunder shall not be affected by (a) the failure of the Issuer to assert any claim or demand or to enforce any right or remedy against Level 3 LLC, any Offering Proceeds Note Guarantor or any other Person under the Offering Proceeds Note
or any other agreement or otherwise; (b) any extension or renewal of any obligation thereof; (c) any rescission, waiver, amendment or modification of any of the terms or provisions of the Offering Proceeds Note, any Offering Proceeds Note
Guarantee or any other agreement or (d) the release of any security held by the Issuer for the Obligations, if any. 
 The Offering
Proceeds Note Guarantor further agrees that its Guarantee herein constitutes a Guarantee of payment, performance and compliance when due (and not a guarantee of collection) and waives any right to require that any resort be had by the Issuer to any
security held for payment of the Obligations. 
 Except as expressly set forth in Section 1.03 or Section 2.08, the obligations of
the Offering Proceeds Note Guarantor hereunder shall not be subject to any reduction, limitation, impairment or termination for any reason, including any claim of waiver, release, surrender, alteration or compromise, and shall not be subject to any
defense of setoff, counterclaim, recoupment or termination whatsoever or by reason of the invalidity, illegality or unenforceability of the Obligations or otherwise. Without limiting the generality of the foregoing, the obligations of the Offering
Proceeds Note Guarantor herein shall not be discharged or impaired or otherwise affected by the failure of the Issuer to assert any claim or demand or to enforce any remedy under the Offering Proceeds Note, any Offering Proceeds Note Guarantee or
any other agreement, by any waiver or modification of any term thereof, by any default, failure or delay, willful or otherwise, in the performance of the Obligations, or by any other act or thing or omission or delay to do any other act or thing
which may or might in any manner or to any extent vary the risk of the Offering Proceeds Note Guarantor or would otherwise operate as a discharge of the Offering Proceeds Note Guarantor as a matter of law or equity. 

The Offering Proceeds Note Guarantor further agrees that its Guarantee herein shall continue to be effective or be reinstated, as the case may
be, if at any time payment, or any part thereof, of principal of or (premium, if any) interest on any Senior Obligation is rescinded or must otherwise be restored by the Issuer upon the bankruptcy or reorganization of Level 3 LLC or otherwise.

 In furtherance of the foregoing and not in limitation of any other right which the Issuer has at law or in equity against the Offering
Proceeds Note Guarantor by virtue hereof, upon the failure of Level 3 LLC to pay the principal of (or premium, if any) or interest on the Obligations when and as the same shall become due or to perform or comply with any other Senior
Obligation, the Offering Proceeds Note Guarantor hereby promises to and will, upon receipt of written demand by the Issuer, forthwith pay, or cause to be paid, in cash, to the Issuer an amount equal to all unpaid amounts in respect of the
Obligations. 
 The Offering Proceeds Note Guarantor agrees that it shall not be entitled to any right of subrogation in respect of any
Obligations guaranteed hereby until payment in full in cash of all Obligations. 

  
 D-2 








 The Offering Proceeds Note Guarantor also agrees to pay any and all costs and expenses (including
reasonable attorneys’ fees) incurred by the Issuer in enforcing any rights under this Article I. 
 SECTION 1.02. Contribution.
The Offering Proceeds Note Guarantor (a “Contributing Party”) agrees that, in the event a payment shall be made by any other Offering Proceeds Note Guarantor under any other Offering Proceeds Note Guarantee (the “Claiming
Offering Proceeds Note Guarantor”), the Contributing Party shall indemnify the Claiming Offering Proceeds Note Guarantor in an amount equal to the amount of such payment multiplied by a fraction, the numerator of which shall be the net
worth of the Contributing Party (which shall be measured on the date hereof) and the denominator of which shall be the aggregate net worth of Level 3 LLC on the Issue Date and the Offering Proceeds Note Guarantors on the respective dates of the
Offering Proceeds Note Guarantee Agreements executed and delivered by such Offering Proceeds Note Guarantors. 
 SECTION 1.03.
Subordination of Guarantees to Qualified Credit Facility. The Offering Proceeds Note Guarantor may enter into an agreement or arrangement that provides that its payment obligation on the Obligations arising hereunder be expressly subordinated
to the extent and under the conditions set forth in Section 1208 of the Indenture. 
 ARTICLE II 

Miscellaneous 
 SECTION
2.01. Successors and Assigns. This Agreement shall be binding upon the Offering Proceeds Note Guarantor and its successors and assigns and shall enure to the benefit of the successors and assigns of the Issuer and, in the event of any
transfer or assignment of rights by the Issuer, the rights and privileges conferred upon that party in the Offering Proceeds Note shall automatically extend to and be vested in such transferee or assignee, all subject to the terms and conditions of
the Indenture. 
 SECTION 2.02. No Waiver. Neither a failure nor a delay on the part of the Issuer in exercising any right, power or
privilege under this Agreement or the Offering Proceeds Note shall operate as a waiver thereof, nor shall a single or partial exercise thereof preclude any other or further exercise of any right, power or privilege. The rights, remedies and benefits
of the Issuer herein and therein expressly specified are cumulative and not exclusive of any other rights, remedies or benefits which either may have under this Agreement or the Offering Proceeds Note at law, in equity, by statute or otherwise. 

SECTION 2.03. Modification. Subject to Section 913 of the Indenture, no modification, amendment or waiver of any provision of this
Agreement, nor the consent to any departure by the Offering Proceeds Note Guarantor therefrom, shall in any event be effective unless the same shall be in writing and signed by the Issuer, and then such waiver or consent shall be effective only in
the specific instance and for the purpose for which given. No notice to or demand on the Offering Proceeds Note Guarantor in any case shall entitle the Offering Proceeds Note Guarantor to any other or further notice or demand in the same, similar or
other circumstances. 
 SECTION 2.04. Opinion of Counsel. Concurrently with the execution and delivery of this Agreement, the
Offering Proceeds Note Guarantor shall deliver to the Issuer an Opinion of Counsel to the effect that this Agreement has been duly authorized, executed and delivered by the Offering Proceeds Note Guarantor and that, subject to the application of
bankruptcy, insolvency, moratorium, fraudulent 

  
 D-3 








 
conveyance or transfer and other similar laws relating to creditors’ rights generally and to the principles of equity, whether considered in a proceeding at law or in equity, the Guarantee
of the Offering Proceeds Note Guarantor is a legal, valid and binding obligation of the Offering Proceeds Note Guarantor, enforceable against the Offering Proceeds Note Guarantor in accordance with its terms. 

SECTION 2.05. Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

SECTION 2.06. Counterparts. The parties may sign any number of copies of this Agreement. Each signed copy shall be an original, but all
of them together represent the same agreement. 
 SECTION 2.07. Effect of Headings. The Section headings herein are for convenience
only and shall not effect the construction thereof. 
 SECTION 2.08. Termination of Agreement and Release of Guarantee. This
Agreement will be terminated and all obligations hereunder of the Offering Proceeds Note Guarantor will be released under the circumstances and conditions set forth in Section 1203 of the Indenture. 

[Remainder of this page intentionally left blank] 

  
 D-4 








 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of the
date first above written. 
  

			
	 [OFFERING PROCEEDS NOTE

GUARANTOR],

		
	    By	 	
		 	  

		 	Name:
		 	Title:


  

			
	LEVEL 3 FINANCING, INC.,
		
	    By	 	
		 	  

		 	Name:
		 	Title:



  
 D-5 








 EXHIBIT E 

SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”) dated as of [    ], among LEVEL 3
FINANCING, INC., a Delaware corporation (the “Issuer”), LEVEL 3 PARENT, LLC, a Delaware limited liability company (“Level 3 Parent”), LEVEL 3 COMMUNICATIONS, LLC, a limited liability company
(“Level 3 LLC”), and THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., a national banking association, as trustee under the Indenture referred to below (the “Trustee”). 

W I T N E S S E T H : 
 WHEREAS
the Issuer, Level 3 Parent and the Trustee have heretofore executed and delivered (a) an Indenture dated as of January 13, 2021 (as amended, supplemented or otherwise modified from time to time, the “Indenture”;
capitalized terms used but not defined herein have the meanings assigned thereto in the Indenture), providing for the issuance by the Issuer of its 3.750% Sustainability-Linked Senior Notes due 2029 (the “Securities”), and
(b) a Supplemental Indenture dated [    ], pursuant to which Level 3 LLC has guaranteed the Issuer’s obligations under the Indenture (the “Subordinated Guarantee”); 

WHEREAS the Issuer, Level 3 Parent, certain lenders (together with their successors and assigns and any future Lenders under and as
defined in the Existing Credit Facility (as hereafter defined) (the “Lenders”) and Merrill Lynch Capital Corporation, as administrative agent and collateral agent (the “Administrative Agent”), have entered into a
Credit Agreement dated as of March 13, 2007 (as amended and restated as of November 29, 2019, the “Existing Credit Facility”), under which the Issuer has borrowed term loans in an aggregate principal amount of
$3,110,500,000 from the Lenders (the “Term Loans”); 
 WHEREAS the Issuer, Level 3 Parent and U.S. Bank National
Association, as trustee in respect of each series of Secured Notes (as defined herein) (collectively, the “Secured Notes Trustees”) and as collateral agent in respect of each series of Secured Notes (the “Notes Collateral
Agents”), have entered into (i) the Indenture, dated as of November 29, 2019 (the “2027 Secured Notes Indenture”), pursuant to which the Issuer has issued $750,000,000 aggregate principal amount of its 3.400%
Senior Secured Notes due 2027 (the “2027 Secured Notes”), and (ii) the Indenture, dated as of November 29, 2019 (the “2029 Secured Notes Indenture” and, together with the 2027 Secured Notes Indenture, the
“Secured Notes Indentures”), pursuant to which the Issuer has issued $750,000,000 aggregate principal amount of its 3.875% Senior Secured Notes due 2029 (together with the 2027 Secured Notes, the “Secured Notes”
and, the Secured Notes together with the Term Loans, the “Issuer Secured Debt”); 
 WHEREAS the Issuer, Level 3
Parent, the Administrative Agent and the Notes Collateral Agent have entered into a First Lien Intercreditor Agreement, dated as of November 29, 2019 (as amended, restated supplemented or otherwise modified from time to time, the
“Intercreditor Agreement”), relating to their relative rights in the Shared Collateral (as defined therein); 
 WHEREAS
Level 3 LLC has guaranteed the obligations of the Issuer under the Existing Credit Facility and the other Loan Documents (as defined in the Existing Credit Facility), the obligations of the Issuer under the 2027 Secured Notes Indenture and the
other Note Documents (as defined in the 2027 Secured Notes Indenture) and the obligations of the Issuer under the 2029 Secured Notes Indenture and the other Note Documents (as defined in the 2029 Secured Notes Indenture); 







 WHEREAS the proceeds of the Issuer Secured Debt have been advanced to Level 3 LLC under an
amended and restated intercompany demand note dated March 13, 2007, in an initial principal amount of $1,400,000,000, as amended and restated through November 29, 2019 in an amount equal to $4,610,500,000, issued by Level 3 LLC to the
Issuer (together with any additional loan proceeds note issued pursuant to Section 9.02 of the Existing Credit Facility and in compliance with the Secured Notes Indentures, and as such note or any such additional note may be further amended
from time to time, the “Loan Proceeds Note”); 
 WHEREAS the Loan Proceeds Note has been pledged by the Issuer to
(i) the Collateral Agent (as defined in the Existing Credit Facility) in order to assure the Lenders against loss in respect of the obligations of the Issuer under the Existing Credit Facility and (ii) the Notes Collateral Agent in order
to assure the holders of the Secured Notes against loss in respect of the obligations of the Issuer under the Secured Notes Indentures; 

WHEREAS pursuant to Section 1208 of the Indenture, the Trustee is authorized to enter into a supplemental indenture which subordinates in
any bankruptcy, liquidation or winding up proceeding a guarantee of an Issuer Restricted Subsidiary as guarantor or borrower pursuant to the Indenture to the obligations of such Subsidiary under a Qualified Credit Facility and the Existing Secured
Notes; 
 WHEREAS upon the guarantee of the Securities by an Issuer Restricted Subsidiary (other than Level 3 LLC), the Issuer,
Level 3 Parent, the Trustee and such Issuer Restricted Subsidiary shall enter into a supplemental indenture in substantially the form of this Supplemental Indenture pursuant to which such guarantee will be subordinated in any bankruptcy,
liquidation or winding up proceeding to the obligations of such Issuer Restricted Subsidiary under the Loan Documents and the Note Documents (as defined in each of the Secured Notes Indentures); 

WHEREAS the Existing Credit Facility constitutes a Qualified Credit Facility and the guarantee of the obligations under the Existing Credit
Facility by Level 3 LLC and the issuance and pledge of the Loans Proceeds Note constitute Guarantees of a Qualified Credit Facility; 

WHEREAS the guarantees of the obligations under the Secured Notes Indentures by Level 3 LLC and the issuance and pledge of the Loan
Proceeds Note constitute Guarantees thereof; and 
 WHEREAS pursuant to Section 801 and Section 1207 of the Indenture, the
Trustee, Level 3 Parent, the Issuer and Level 3 LLC are authorized to execute and deliver this Supplemental Indenture. 
 NOW
THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, Level 3 Parent, the Issuer, Level 3 LLC and the Trustee mutually covenant and agree for the equal and
ratable benefit of the holders of the Securities as follows: 

  
 E-2 








 ARTICLE I 

Subordination 
 SECTION
1.1. Subordination. The Trustee hereby agrees that all obligations in respect of any amounts payable by Level 3 LLC pursuant to the Subordinated Guarantee, including the guarantee of the payment of principal, premium (if any), interest
or all other amounts payable in respect of the Securities (the “Subordinated Obligations”), shall be subordinate and junior in right of payment, to the extent and in the manner provided in the Indenture (as supplemented by this
Supplemental Indenture), to the prior payment in full in cash of all obligations (including without limitation the Obligations (as defined in the Existing Credit Facility) and the Obligations (as defined in each of the Secured Notes Indentures)) of
Level 3 LLC under or in respect of the Loan Documents, the Note Documents (as defined in each of the Secured Notes Indentures) and the Loan Proceeds Note, including the payment of principal, premium (if any), interest (including interest
arising after the commencement of a bankruptcy or other proceeding, whether or not such a claim is permitted in such proceeding), the guarantees thereof or all other amounts payable thereunder (the “Senior Obligations”). 

SECTION 1.2. Subordination in the Event of Dissolution or Insolvency of Level 3 LLC. Upon any distribution of assets
of Level 3 LLC in connection with its dissolution or insolvency or upon any dissolution, winding up, liquidation or reorganization of Level 3 LLC, whether in bankruptcy, insolvency, reorganization, arrangement or receivership or similar
proceedings, or upon any assignment for the benefit of creditors or any other marshaling of the assets and liabilities of Level 3 LLC: 

(a) the Administrative Agent, the Secured Notes Trustees, the Notes Collateral Agents and the other holders of the Senior Obligations (the
“Senior Creditors”), subject to the terms of the Intercreditor Agreement, shall first be entitled to receive payment in full in cash of the Senior Obligations in accordance with the terms of such Senior Obligations before the
Securityholders shall be entitled to receive any payment on account of the Subordinated Obligations owed by Level 3 LLC in respect of the Securities, whether of principal, premium (if any), interest, pursuant to the Subordinated Guarantee or
otherwise; and 
 (b) any payment by, or distribution of the assets of, Level 3 LLC of any kind or character, whether in cash, property
or securities, to which the Securityholders would be entitled except for the provisions of Section 1208 of the Indenture and this Supplemental Indenture shall be paid or delivered by the Person making such payment or distribution (whether a
trustee in bankruptcy, a receiver, custodian or liquidating trustee or otherwise) directly to the Administrative Agent, the Secured Notes Trustees, the Notes Collateral Agents or the other Senior Creditors, subject to the terms of the Intercreditor
Agreement, to the extent necessary to make payment in full in cash of all Senior Obligations remaining unpaid, after giving effect to any concurrent payment or distribution to the Administrative Agent, the Secured Notes Trustees, the Notes
Collateral Agents or the other Senior Creditors in respect of the Senior Obligations. 
 SECTION 1.3. Certain Payments Held in Trust.
In the event that any payment by, or distribution of the assets of, Level 3 LLC of any kind or character, whether in cash, property or securities, and whether directly or otherwise, shall be received by or on behalf of the Trustee or the
Securityholders at a time when such payment is prohibited by or contrary to the agreements set forth in this Supplemental Indenture, such payment or distribution shall be held in trust for the benefit of, and shall be paid over to, the
Administrative Agent, the Secured Notes Trustees, the Notes Collateral Agents or the other Senior 

  
 E-3 








 
Creditors, subject to the terms of the Intercreditor Agreement, to the extent necessary to make payment in full in cash of all Senior Obligations remaining unpaid, after giving effect to any
concurrent payment or distribution to the Administrative Agent, the Secured Notes Trustees, the Notes Collateral Agents or the other Senior Creditors in respect of such Senior Obligations. 

SECTION 1.4    Trustee Not Fiduciary. The Trustee shall not be deemed to owe any fiduciary duty to the Senior
Creditors and shall not be liable to any such Senior Creditor if the Trustee shall in good faith mistakenly pay over or distribute to the Securityholders or to the Issuer or to any other person cash, property or securities to which any holders of
Senior Obligations shall be entitled by virtue of this Article or otherwise. With respect to the holders of Senior Obligations, the Trustee undertakes to perform or to observe only such of its covenants or obligations as are specifically set forth
in this Article and no implied covenants or obligations with respect to holders of Senior Obligations shall be read into this Supplemental Indenture against the Trustee. 

SECTION 1.5.     Legend. Any and all instruments or records now or hereafter creating or evidencing the
Subordinated Obligations, whether upon refunding, extension, renewal, refinancing, replacement or otherwise, shall contain the following legend: 

“Notwithstanding anything contained herein to the contrary, neither the principal of nor the interest on, nor any
other amounts payable in respect of, the indebtedness created or evidenced by this instrument or record shall be paid or payable with or by the funds provided by Level 3 Communications, LLC, except to the extent permitted under the Supplemental
Indenture dated [    ], among Level 3 Parent, LLC, Level 3 Communications, LLC, Level 3 Financing, Inc. and the Trustee, which Supplemental Indenture is incorporated herein with the same effect as if fully set
forth herein.” 
 SECTION 1.6. Obligations Hereunder Not Affected. This Supplemental Indenture shall be operative and remain
in effect until both (1) the Existing Credit Facility no longer constitutes a Qualified Credit Facility and (2) no debt securities are outstanding under any of the Secured Notes Indentures. Notwithstanding the foregoing, this Supplemental
Indenture shall be automatically reinstated, if at any time any payment of the Senior Obligations or any part thereof shall be rescinded or must otherwise be returned by the Administrative Agent, the Secured Notes Trustees, the Notes Collateral
Agents or the other Senior Creditors upon the insolvency, bankruptcy or reorganization of Level 3 LLC or otherwise, all as though such payment had not been made. 

ARTICLE II 
 Miscellaneous

 SECTION 2.1. Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF
THE STATE OF NEW YORK BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

SECTION 2.2. Modification. No modification, amendment or waiver of any provision of this Supplemental Indenture shall in any event be
effective unless the same shall be in writing and signed by the Trustee, and then such waiver or consent shall be effective only in the specific instance and for the purpose for which given. 

  
 E-4 








 SECTION 2.3. Opinion of Counsel. Concurrently with the execution and delivery of this
Supplemental Indenture, the Issuer shall deliver to the Trustee an Opinion of Counsel to the effect that this Supplemental Indenture has been duly authorized, executed and delivered by each of Level 3 Parent, the Issuer and Level 3 LLC and
that, subject to the application of bankruptcy, insolvency, moratorium, fraudulent conveyance or transfer and other similar laws relating to creditors’ rights generally and to the principles of equity, whether considered in a proceeding at law
or in equity, this Supplemental Indenture is a legal, valid and binding obligation of Level 3 Parent, the Issuer and Level 3 LLC, enforceable against each of them in accordance with its terms. 

SECTION 2.4. Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended hereby, the
Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every Holder of
Securities heretofore or hereafter authenticated and delivered shall be bound hereby. 
 SECTION 2.5. Counterparts. The parties may
sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 

SECTION 2.6. Headings. Article and Section headings used herein are for convenience of reference only, are not part of this
Supplemental Indenture and are not to affect the construction of, or to be taken into consideration in interpreting, this Supplemental Indenture. 

SECTION 2.7. Trustee. The Trustee makes no representation as to the validity or sufficiency of this Supplemental Indenture. The
recitals and statements herein are deemed to be those of the Issuer, Level 3 Parent, Level 3 LLC and not of the Trustee. 

[Remainder of this page intentionally left blank] 

  
 E-5 








 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed as of the date
first above written. 
  

			
	LEVEL 3 PARENT, LLC,
		
	By	 	
		 	  

		 	Name:
		 	Title:
	
	LEVEL 3 FINANCING, INC.,
		
	By	 	
		 	  

		 	Name:
		 	Title:
	
	LEVEL 3 COMMUNICATIONS, LLC,
		
	By	 	
		 	  

		 	Name:
		 	Title:
	
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee,
		
	By	 	
		 	  

		 	Name:
		 	Title:



  
 E-6 








 EXHIBIT F 

Notwithstanding anything contained herein to the contrary, neither the principal of nor the interest on, nor any other amounts payable in respect of, the
indebtedness created or evidenced by this instrument or record shall become due or be paid or payable, except to the extent permitted under the Amended and Restated Omnibus Offering Proceeds Note Subordination Agreement, dated as of
November 29, 2019, among Level 3 Financing, Inc., Level 3 Financing, Inc., in its capacity as a Subordinated Lender (as defined therein) as obligee of the Offering Proceeds Notes (as defined therein), Level 3 Parent, LLC and
Level 3 Communications, LLC, which Amended and Restated Omnibus Offering Proceeds Note Subordination Agreement is incorporated herein with the same effect as if fully set forth herein. 

FORM OF OFFERING PROCEEDS NOTE 
 PRINCIPAL SUM:
US$900,000,000 
 DATE: January 13, 2021 
 PAYEE: Level 3
Financing, Inc., a Delaware corporation 
 Level 3 Communications, LLC, a limited liability company organized under the laws of the
State of Delaware (the “Payor”), for value received, hereby promises to pay ON DEMAND to the order of the Payee stated above, the Principal Sum stated above (or so much thereof as shall not have been prepaid) and to pay interest
(computed on the basis of a 360-day year comprised of twelve 30-day months) on the unpaid principal hereof from the Date stated above, or from the most recent date to
which interest has been paid or provided for, at the rate of 3.750% per annum payable in cash semiannually in arrears on January 15 and July 15 of each year commencing July 15, 2021 (and at any other time (and at such rate) when a
payment of interest is made on the 3.750% Sustainability-Linked Senior Notes due 2029 (the “Senior Notes”) issued by Level 3 Financing, Inc., a Delaware corporation (“Level 3 Financing”))
until such principal sum shall have become due and payable. Payments of principal and interest shall be made in US dollars and in immediately available funds at the appropriate office of the Payee (as designated by the Payee to the Payor). The Payee
may demand payment of the unpaid principal of this Offering Proceeds Note (this “Note”) in whole or in part at any time. In the event the Payee shall demand payment in connection with an Offer to Purchase made pursuant to the
Indenture (as defined below) in connection with a Change of Control Triggering Event or an optional redemption made pursuant to the Indenture, the Payor shall pay a premium of the principal amount repaid equal to 1% of the principal amount prepaid
with respect to an Offer to Purchase or any applicable redemption premium with respect to an optional redemption. 
 No failure or delay on
the part of the Payee in exercising any of its rights, powers or privileges hereunder shall operate as a waiver thereof, nor shall a single or partial exercise thereof preclude any other or further exercise of any right, power or privilege. The
remedies provided herein are cumulative and are not exclusive of any remedies provided by law. 
 Presentment and demand for payment, notice
of default, dishonor or nonpayment, protest and notice of protest and all other demands and notices in connection with delivery, acceptance, performance or enforcement of this Note are hereby waived by the Payor. 







 Neither the Payor nor other parties hereafter becoming liable for payment of this Note shall ever
be required to pay interest on this Note at a rate in excess of the maximum interest that may be lawfully charged under applicable law, and the provisions of this paragraph shall control over all provisions of this Note which may be in apparent
conflict herewith. In the event that the Payee shall collect monies which are deemed to constitute interest which would increase the effective interest rate on this Note to a rate in excess of that permitted to be charged by applicable law, all such
sums deemed to constitute interest in excess of the lawful rate shall, upon such determination, at the option of the Payee, be either immediately returned to the Payor or credited against the principal balance of this Note then outstanding, in which
event any and all penalties of any kind under applicable law as a result of such excess interest shall be inapplicable. 
 The Payee may
assign this Note without the consent of the Payor. The Payor may not assign any of its rights and obligations under this Note without the prior written consent of the Payee. Any assignment made in violation of the foregoing prohibition shall be
void. 
 This Note and the rights and obligations of the Payee and Payor hereunder shall be governed by, and interpreted and construed in
accordance with, the laws of the State of New York, without regard to conflicts of law principles thereof. 
 Capitalized terms used but not
otherwise defined herein shall have the meanings assigned to such terms in the Indenture, dated as of January 13, 2021, among the Payee, Level 3 Parent, LLC and U.S. Bank National Association, as trustee (the “Indenture”).

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 IN WITNESS WHEREOF, the parties hereto have duly executed and delivered this Note as of the date
first above written. 
  

			
	LEVEL 3 COMMUNICATIONS, LLC,
		
	    By	 	
		 	  

		 	Name:
		 	Title:


 Agreed and Accepted: 

 

			
	LEVEL 3 FINANCING, INC.,
		
	    By	 	
		 	  

		 	Name:
		 	Title:



  
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