| 1. | Purpose |
|----|---------|

| 2. | Eligible      Employees |
|----|-------------------------|

|  | (a) | All      Employees of the Company and any of its Designated Subsidiaries (each such      entity being referred to as a “Participating Employer”) who have completed      at least ninety (90) days of employment with a Participating Employer on      or before the first day of the applicable Offering Period (as defined in      Section 4 below) shall be eligible to receive Options under this Plan to      purchase the Company’s CommonStock. |
|--|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (b) | Notwithstanding      the foregoing, the following Employees shall not be eligible to      participate in the Plan or any Offering under the Plan, as      applicable: |
|--|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (i) | any      Employee who, immediately after the Option is granted, would own Common      Stock and/or outstanding options to purchase Common Stock possessing five      (5%) percent or more of the total combined voting power or value of all      classes of stock of the Company or of its parent corporation or subsidiary      corporation as the terms “parent corporation” and “subsidiary corporation”      are defined in Sections 424(e) and (f) of the Code.  For      purposes of determining stock ownership under this paragraph, the rules of      Section 424(d) of the Code shall apply and stock that an Employee may      purchase under outstanding options shall be treated as stock owned by the      Employee; and |
|--------|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (ii) | any      officers of the Company or its Designated Subsidiaries subject to the      disclosure requirements of Section 16(a) of the Securities Exchange Act of      1934, provided the exclusion is applied in an identical manner to all such      officers; and |
|--------|------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (iii) | employees      who are citizens or residents of a foreign jurisdiction if the grant of an      Option under the Plan or an Offering to such individual is prohibited      under the laws of the foreign jurisdiction; or compliance with the laws of      the foreign jurisdiction would cause the Plan or Offering to violate the      requirements of Section 423 of theCode. |
|--|-------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| 3. | Stock      Subject to the Plan |
|----|--------------------------------|

| 4.  | Offering Periods and      Options |
|----------|-----------------------------------|

|  | (a) | While      the Plan is in effect, one offering period during which payroll deductions      will be accumulated under the Plan (the “Offering Period”) shall commence      in each calendar year, unless otherwise determined by the      Committee.  The Offering Period shall commence on January 16 and      end on the following November 15, provided that, in 2010, the Offering      Period shall commence on September 1, 2010 and end on November 15,      2010.  The Committee may in its sole and absolute discretion      provide for additional, fewer or other Offering Periods, provided that no      Offering Period shall exceed twenty-seven (27) months or violate any other      limitation imposed by Section 423 of the Code.  The Offering      Commencement Date is the first day of each Offering Period.  The      Offering Termination Date the last business day of the Offering      Period. |
|--|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (b) | On      each Offering Commencement Date, the Company will grant to each Eligible      Employee who is then a Participant in the Plan an Option to purchase on      the Offering Termination Date at the Option Exercise Price, as provided in      this paragraph (b), that number of whole shares of Common Stock reserved      for the purpose of the Plan which his or her accumulated payroll      deductions determined on the Offering Termination Date (including any      amount carried forward pursuant to Section 8 hereof) will purchase at the      Option Exercise Price; provided that such Employee remains eligible to      participate in the Plan throughout such Offering Period.  The      Option Exercise Price for each Offering Period shall be eighty-five      percent (85%) of the Fair Market Value of the Common Stock on (i) the      Offering Commencement Date or (ii) the Offering Termination Date,      whichever is lower.  In the event of an increase or decrease in      the number of outstanding shares of Common Stock through  stock      split-ups, reclassifications, stock dividends, and the like, an      appropriate adjustment shall be made in accordance with the provisions of      Section 23. |
|--|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|  | (c) | For      purposes of this Plan, the term “Fair Market Value” on any date means, if      the Common Stock is listed on a national securities exchange, the closing      price of the Common Stock on such date on such exchange or, if the Common      Stock is traded in the over-the-counter securities market and reported on      the over-the-counter bulletin board market (“OTCBB”), the closing price      for such shares on the OTCBB.  If no shares of Common Stock are      traded on the Offering Commencement Date and/or the Offering Termination      Date, the Fair Market Value will be determined by taking the closing price      on the immediately preceding business day on which shares of Common Stock      are traded. |
|--|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (d) | For      Purposes of this Plan the term “business day” as used herein means a day      on which there is trading on the national securities exchange on which the      Common Stock is listed. |
|--|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (e) | No      Employee shall be granted an option that permits his right to purchase      Common Stock under the Plan and any other Section 423 plans of the Company      or any parent or subsidiary corporations to accrue at a rate that exceeds      $25,000 of Fair Market Value of such stock (determined as of the Offering      Commencement Date) for each calendar year in which such option is      outstanding at any time.  The preceding sentence shall comply,      and be construed in accordance, with Section 423(b)(8) of the Code and      regulations issued thereunder. |
|--|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 5. | Exercise of      Option |
|----|-------------------------|

----

| 6. | Authorization for      Entering Plan |
|----|--------------------------------------|

|  | (a) | An      Eligible Employee may enter the Plan and become a Participant by filling      out, signing and delivering to the Chief Financial Officer of the Company      or his designee an authorization  (“Authorization”): |
|--|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (i) | stating      the whole percentage or amount of Compensation to be deducted from his or      her Compensation by the Company (or the Designated Subsidiary) employing      such Participant on each payday covering the Offering    Period; |
|--------|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (ii) | authorizing      the purchase of Common Stock for him or her in each Offering Period on the      Offer Termination Date in accordance with the terms of the      Plan; |
|--------|------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (iii) | specifying      the exact name in which Common Stock purchased for him or her is to be      issued in accordance with Section 11 hereof;and |
|--|-------|---------------------------------------------------------------------------------------------------------------------------------------------|

|  | (iv) | at      the discretion of the Employee in accordance with Section 14, designating      a beneficiary who is to receive any Common Stock and/or cash in the event      of his or her death. |
|--|------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (b) | The      Participating Employer will accumulate and hold for the Participant’s      Account the amounts deducted from his or her Compensation.  Such      Account shall be a separate bookkeeping account maintained by the      Participating Employer for each Participant, and the amount of each      Participant’s payroll deductions shall be credited to such      Account.  No interest will accrue or be paid      thereon.  Participants may not make any separate contributions      into their Account.  Payroll deductions shall not be held in any      segregated trust fund and may be commingled with the general assets of the      Participating Employer and used for general corporate      purposes. |
|--|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (c) | Unless      the Participant files a new Authorization (in accordance with Section 9),      withdraws from the Plan, ceases to be an Eligible Employee or terminates      his or her employment, such Authorization will continue in effect for each      subsequent Offering Period as long as the Plan remains in      effect. |
|--|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 7. | Maximum Amount of      Payroll Deductions |
|----|-------------------------------------------|

----

| 8. | Unused Payroll      Deductions |
|----|--------------------------------|

| 9. | Change in Payroll      Deductions |
|----|-----------------------------------|

| 10. | Withdrawal from the      Plan |
|-----|-------------------------------|

|  | (a) | A      Participant may withdraw from the Plan and withdraw all but not less than      all of the payroll deductions credited to his or her Account under the      Plan prior to an Offering Termination Date by delivering a notice to the      Chief Financial Officer of the Company or his designee (a “Withdrawal      Notice”) at least ten days prior to such Offering Termination Date, in      which event the Company will promptly refund without interest the entire      balance of such Employee’s deductions not theretofore used to purchase      Common Stock under the Plan. |
|--|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (b) | If      the Participant withdraws from the Plan, his purchase rights under the      Plan will be terminated and no further payroll deductions will be      made.  To re-enter the Plan, such an Employee must file a new      Authorization at least ten (10) business days before the next Offering      Commencement Date.  Such Authorization will become effective for      the Offering Period that commences on such Offering Commencement      Date. |
|--|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| 11.  | Issuance of      Stock |
|-----------|------------------------|

| 12.  | No Transfer or      Assignment of Employee’sRights |
|-----------|----------------------------------------------------------|

| 13.  | Termination of      Employee’s Rights |
|-----------|---------------------------------------------|

|  | (a) | Except      as set forth in the last paragraph of this Section 13, an Employee’s      rights under the Plan will terminate when he or she terminates employment,      dies, or ceases to be an Eligible Employee.  A Withdrawal Notice      will be considered as having been received from the Employee on the date      his or her employment ceases, and all payroll deductions not used to      purchase Common Stock will berefunded. |
|--|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|  | (b) | Upon      termination of the Employee’s employment because of death, the Employee’s      beneficiary (as provided in Section 14) shall have the right to elect, by      written notice given to the Chief Financial Officer of the Company or his      designee prior to the expiration of the thirty (30) day period (or such      shorter period if the next Offering Termination Date is less than 30 days      after the Employee’s death) commencing with the date of the death of the      Employee, either (i) to withdraw without interest, all of the payroll      deductions credited to the Employee’s Account under the Plan, or (ii) to      exercise the Employee’s Option for the purchase of shares of Common Stock      on the next Offering Termination Date following the date of the Employee’s      death for the purchase of that number of whole shares of Common Stock      reserved for the purpose of the Plan which the accumulated payroll      deductions in the Employee’s Account at the date of the Employee’s death      will purchase at the applicable Option Exercise Price (subject to the      maximum number set forth in Section 5), and any excess in such Account      will be returned to said beneficiary.  In the event that no such      written notice of election shall be duly received by the Chief Financial      Officer of the Company or his designee, the beneficiary shall      automatically be deemed to have elected to withdraw the payroll deductions      credited to the Participant’s Account at the date of the Participant’s      death and the same will be paid promptly to said beneficiary, without      interest. |
|--|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 14.  | Designation of      Beneficiary |
|-----------|---------------------------------|

| 15. | Termination and      Amendments to Plan |
|-----|-----------------------------------------|

|  | (a) | The      Plan may be terminated at any time by the Company’s Board of      Directors.  Upon such termination or any other termination of      the Plan, all payroll deductions not used to purchase Common Stock will be      refunded without interest. |
|--|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|  | (b) | The      Board of Directors reserves the right to amend the Plan from time to time      in any respect; provided, however, that no amendment shall be effective      without stockholder approval if the amendment would (a) increase the      aggregate number of shares of Common Stock to be offered under the Plan      (other than an increase merely reflecting a change in the number of      outstanding shares, such as a stock dividend or stock split), or (b)      change the designation of corporations whose Employees may be offered      Options under the Plan, expressly provided, however, that the Committee      may, without stockholder approval, designate participating subsidiaries      and other affiliates in accordance with Section 18 including, without      limitation, those corporations becoming affiliated with the Company after      the adoption and approval of the Plan.  The Committee may also      amend the Plan from time to time in a manner consistent with the Board’s      power to amend, suspend or discontinue thePlan. |
|--|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 16. | Sale of Stock      Purchased Under the Plan and Tax  Withholding |
|-----|------------------------------------------------------------------|

|  | (a) | Any      Participant who sells or otherwise transfers shares purchased under the      Plan within two (2) years after the beginning of the Offering Commencement      Period in which the shares were purchased must, within thirty (30) days of      such transfer notify the Chief Financial Officer of the Company or his      designee in writing of such transfer, showing the number of such shares      disposed of, and providing such additional information as the Company may      require. |
|--|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (b) | To      the extent that a Participant realizes ordinary income in connection with      a sale or other transfer of any shares of Common Stock purchased under the      Plan, the Company or other Participating Employer shall, to the extent      required by applicable law, withhold amounts needed to cover such taxes      from any payments otherwise due and owing to the Participant or from      shares that would otherwise be issued to the Participant      hereunder. |
|--|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 17. | Company’s Payment of      Plan Expenses |
|-----|-----------------------------------------------|

| 18. | Participating      Subsidiaries |
|-----|---------------------------------|

----

| 19.  | Administration of the      Plan |
|-----------|---------------------------------|

|  | (a) | The      Plan shall be administered by the Compensation Committee of the Board of      Directors.  No member of the Committee shall be eligible to      participate in the Plan while serving as a member of the      Committee.  The Committee shall have full authority      to: |
|--|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (i) | determine      when and how Options shall be granted and the provisions of each      Offering; |
|--------|-----|------------------------------------------------------------------------------------------------|

|   | (ii) | designate      from time to time which subsidiaries of the Company shall be eligible to      participate in the Plan; |
|--------|------|-----------------------------------------------------------------------------------------------------------------------|

|  | (iii) | construe      and interpret the Plan and Options granted under the  Plan; |
|--|-------|---------------------------------------------------------------------------|

|  | (iv) | establish      rules for the administration of the Plan and make administrative decisions      regarding the Plan; and |
|--|------|------------------------------------------------------------------------------------------------------------------------|

|   | (v) | remedy      any defect, or omission or inconsistency in the Plan in a manner and to      the extent necessary or expedient to make the Plan fully      effective. |
|--------|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (b) | Promptly      after the end of each Offering Period, the Company shall prepare and      distribute to each Participant in the Plan a report containing the amount      of the Participant’s accumulated payroll deductions as of the Offering      Termination Date, the Option Exercise Price for such Offering Period, the      number of shares of Common Stock purchased by the Participant with the      Participant’s accumulated payroll deductions, and the amount of any unused      payroll deductions either to be carried forward to the next Offering      Period, or returned to the Participant without  interest. |
|--|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (c) | No      member of the Board of Directors or the Committee shall be liable for any      action or determination made in good faith with respect to the Plan or any      option granted under it. The Company shall indemnify each member of the      Board of Directors and the Committee to the fullest extent permitted by      law with respect to any claim, loss, damage or expense (including counsel      fees) arising in connection with their responsibilities under this      Plan. |
|--|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| 20. | Shareholder      Status/Employment |
|-----|------------------------------------|

|  | (a) | Neither      the granting of an Option to an Employee nor the deductions from his or      her pay shall confer any rights of share ownership with respect to the      shares covered by such Option until such shares have been purchased by and      issued to him or her. |
|--|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (b) | Neither      the Plan or any Option granted hereunder confers upon any Employee the      right to continued employment with the Company or any of its Designated      Subsidiaries, nor will an Employee’s participation in the Plan restrict or      interfere in any way with the right of the Company or any of its      Designated Subsidiaries to terminate the Employee’s employment at any      time, unless otherwise restricted by a separate agreement between the      Company and Employee. |
|--|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 21. | Application of      Funds |
|-----|---------------------------|

| 22.  | Governmental      Regulation |
|-----------|------------------------------|

| 23.  | Effect of Changes of      Common Stock |
|-----------|----------------------------------------|

----

| 24. | Merger, Liquidation or      Dissolution of the Company |
|-----|--------------------------------------------------------|

| 25. | Approval of      Stockholders |
|-----|-------------------------------|

| 26. | Governing      Law |
|-----|--------------------|

| 27. | Defined      Terms. |
|-----|---------------------|

|  | (a) | “Account” means the      bookkeeping account established for a Participant under the Plan to record      his payroll deductions and Common Stock balance under the      Plan. |
|--|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (b) | “Affiliate” means any      subsidiary corporation of the Company, as defined in Section 424(o) of the      Code. |
|--|-----|------------------------------------------------------------------------------------------------------------------------------|

|  | (c) | “Agent” means the      brokerage firm, bank or other financial institution, entity or person(s)      if any, engaged to act as agent of the Company or Committee with regard to      the administration of the Plan. |
|--|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (d) | “Authorization” means a      Participant’s payroll deduction authorization with respect to an Offering      Period. |
|--|-----|---------------------------------------------------------------------------------------------------------------------------------------|

|  | (e) | “Board of Directors”      means the board of directors of theCompany. |
|--|-----|-----------------------------------------------------------------------------------|

----

|  | (f) | “Code” means the      Internal Revenue Code of 1986, asamended. |
|--|-----|-----------------------------------------------------------------------------|

|  | (g) | “Committee” means the      Compensation Committee of theCompany. |
|--|-----|------------------------------------------------------------------------------|

|  | (h) | “Common Stock” means the      Company’s $.01 par value commonstock. |
|--|-----|---------------------------------------------------------------------------------------|

|  | (i) | “Company” means      AboveNet, Inc. |
|--|-----|-------------------------------------------------|

|  | (j) | “Compensation” means      base salary. |
|--|-----|----------------------------------------------------|

|  | (k) | “Designated Subsidiaries”      means those subsidiaries of the Company that have been designated      as eligible to participate in the Plan with respect to their Employees in      accordance with Section 18 of thePlan. |
|--|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (l) | “Eligible Employee” means      any Employee who has met the eligibility requirements of Section 2 and,      therefore, is eligible to participate in Offerings under the      Plan. |
|--|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (m) | “Employee” means any      person who is employed by the Company or any one of its Designated      Subsidiaries for tax purposes. |
|--|-----|----------------------------------------------------------------------------------------------------------------------------------------------|

|  | (n) | “Offering” means the      grant of an option to purchase shares of Common Stock under the      Plan. |
|--|-----|------------------------------------------------------------------------------------------------------------------|

|  | (o) | “Offering Commencement Date”      means a date selected by the Committee for an Offering to      commence. |
|--|-----|------------------------------------------------------------------------------------------------------------------------|

|  | (p) | “Offering Period” means      the period during which payroll deductions are accumulated for purchases      of Common Stock under the Plan, as determined in Section    4(a). |
|--|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (q) | “Offering Termination Date”      means the last trading day in an Offering Period, as determined in      Section 4 of the Plan. |
|--|-----|---------------------------------------------------------------------------------------------------------------------------------------------|

|  | (r) | “Option” means an option      to purchase shares of Common Stock granted pursuant to the      Plan. |
|--|-----|-----------------------------------------------------------------------------------------------------------------|

|  | (s) | “Option Exercise Price”      means the purchase price for the Common Stock offered under this Plan, as      determined in Section 4 hereof. |
|--|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (t) | “Participant” means an      Eligible Employee who has executed, and not withdrawn, an Authorization      with respect to an Offering Period. |
|--|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------|

|   |            | ABOVENET,      INC.                                              |   |
|--------|-----------------|------------------------------------------------------------------|--------|
|   |            |                                                             |   |
|   | By:   | /s/ Robert Sokota                                           |   |
|   |            | Name:  Robert      Sokota                              |   |
|   |            | Title:  Senior      Vice President and General Counsel |   |

----