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Exhibit
10.3.3.
 AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT
    
    
    1. CONTRACT ID CODE
    
    
    Page 
1 of 2
 2. AMENDMENT/MODIFICATION NO.
    0006
    
    
    3. EFFECTIVE DATE
    10/06/2005
    
    
    4. REQUISITION/PURCHASE REQ. NO.
    
    
    5. PROJECT NO. (If applicable)
 6. ISSUED BY
FCC /Contracts and Purchasing Center
445 12th St., SW,
Washington, DC 20554
    
    
    CODE  |   00001
    
    
    7. ADMINISTERED BY (If other than Item 6)
    
    
    CODE  |
 8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and Zip Code)
    
    
    
    
    
    9A. AMENDMENT OF SOLICITATION NO.9B. DATED (SEE ITEM 11)Neustar, Inc.
46000 Center Oak Plaza
Sterling, VA 20166
    
    
    þ
    
    
    10A. MODIFICATION OF CONTRACT/ORDER
NO. CON03000016þ
    
    
    10B. DATED (SEE ITEM 13)
 CODE *
    
    
    FACILITY CODE
 11.THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS
 
 o
    
    The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers       o is extended,       o is not extended.Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:(a) By completing Items 8 and 15, and returning _______ copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate
letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO
THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter,
provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.
 
 12.
    
    ACCOUNTING AND APPROPRIATION DATA (If required)No Funding Information
 
 
 
 CHECK ONEo
    
    
    A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN
THE CONTRACT ORDER NO. IN ITEM 10A.o
    
    
    B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as
changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).o
    
    
    C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:o
    
    
    D. OTHER (Specify type of modification and authority)
 þ o
 
 Organized by UCF section headings, including solicitation/contract subject matter where feasible.)
        15A. NAME AND TITLE OF SIGNER (Type or print)
    
    
    
    16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)
Dennis O. Dorsey15B.CONTRACTOR/OFFEROR 
___________________________________________    
(Signature of person authorized to sign)
    
    
    15C. DATE SIGNED
    
    
    16B. United States of America
By Dennis O. Dorsey
      (Signature of Contracting Oficer)
    
    
    16C. DATE SIGNED10/6/05
 NSN 7540-01-152-8070
    
    STANDARD FORM 30 (REV. 10-83)PREVIOUS EDITION
    
    Prescribed by GSA FAR (48 CFR)UNUSABLE
    
    53.243




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##### 



Line Item
Summary
    
    
    
    
    
    Document Number
CON03000016/0006
    
    
    
    
    
    Title
NANP Administrator
    
    
    
    
    
    
    
    
    
    
    
    Page
2 of 2Line Item
Number
    
    
    Description
    
    
    
    
    
    Delivery Date
(Start date to End date)
    
    
    
    
    
    Quantity
    
    
    Unit of
Issue
    
    
    Unit Price
    
    
    Total CostNo Changed Line Item Fields
    
    
      
    
    
    
    Previous Total:
Modification Total:
Grand Total:




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##### 



National Pooling Administration
 Change
Order Proposal #37
 (INC Issue #458  Reduce Aging Period for
Returned/Reclaimed Blocks)
      NeuStar, Inc.
    
    46000 Center Oak PlazaSterling VA, 20166




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##### 



Natl PAS  Change Order #37 (INC Issue 458)
    
    December 7, 2004
 
  Table of Contents
 1
    
    Introduction
    
    
    32
    
    Industry Numbering Committees Proposed Change
    
    
    43
    
    The Proposal
    
    
    54
    
    Assumptions and Risks
    
    
    55
    
    Cost
    
    
    56
    
    Conclusion
    
    
    5
 © NeuStar, Inc. 2004
    
    NeuStar Proprietary and Confidential
    
    -ii-




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##### 



Natl PAS  Change Order #37 (INC Issue 458)
    
    December 7, 2004
 
  1
Introduction
 1.1 Purpose and Scope
 1
 2.5 Changes in the Environment
  2.5.1 Process
  2.5.2 Changes
  2.5.3 Notifications
  2.5.4 Roles
   
 1FCC Contract Number CON01000016 © NeuStar, Inc. 2004
    
    NeuStar Proprietary and Confidential
    
    -3-




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##### 



Natl PAS  Change Order #37 (INC Issue 458)
    
    December 7, 2004
 
   2 Industry Numbering Committees Proposed Change
  INC Issue 458 Reduce Aging Period for Returned/Reclaimed Blocks
 http://www.atis.org
 A)
Issue Statement
   B) Following Resolution from INC
 The following text changes were made to the TBPAG, section 9.2.4:
  © NeuStar, Inc. 2004
    
    NeuStar Proprietary and Confidential
    
    -4-




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##### 



Natl PAS  Change Order #37 (INC Issue 458)
    
    December 7, 2004
 
  time for the LERG Assignee to update switch translations in order to provide
blank number treatment for the returned thousands-block(s). The PA will make
the thousands-block available for reassignment after
45 calendar days.
 3 The Proposal
  Solution
  4 Assumptions and Risks
   5 Cost
   6 Conclusion
  © NeuStar, Inc. 2004
    
    NeuStar Proprietary and Confidential
    
    -5-