Exhibit 10.3.3
 
  AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT
     (If applicable)
  (If other than Item 6)
 (No., street, county, State and Zip Code)
  (SEE ITEM 11)
  (SEE ITEM 13)
 o  o o
  (If required)
    ü (Specify type of modification and authority)
 : x o
 (Organized by UCF section headings, including
solicitation/contract subject matter where feasible.)
 (Type or print)
 (Signature of person authorized to sign) (Type or print)
 /s/ Anthony S. Wimbush  (Signature of Contracting Officer)




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National Pooling Administration
 Contract #CON07000005
 Change Order Proposal #2
 (INC Issue #578  Update TBPAG to Limit Timeframe for Block Reservations)
  NeuStar, Inc.
    
    46000 Center Oak Plaza
Sterling VA, 20166




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Natl PAS  Change Order #2  Block Reservations
    
    June 13, 2008
 Table of Contents
 1
    
    Introduction
    
    
    32
    
    Industry Numbering Committee (INC) Issue
    
    
    43
    
    Industry Numbering Committee (INC) Resolution
    
    
    44
    
    The Proposed Solution
    
    
    65
    
    Assumptions and Risks
    
    
    66
    
    Cost
    
    
    67
    
    Conclusion
    
    
    7
 © NeuStar, Inc. 2008
    
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Natl PAS  Change Order #2  Block Reservations
    
    June 13, 2008
 1 Introduction
 1.1 Purpose and Scope
 1
 2.5.4 Modifications of Guidelines
   
    
    Provide, in real time, technical guidance to ensure processes and procedures are
effective in meeting the goals of the change.
    
    Provide issues and contributions, and be prepared to discuss at INC meetings how
the proposed change promotes numbering policy and/or benefits the NANP and how the
change will affect the PAs duties, obligations and accountability.
    
    Assess and share in real time (i.e., during discussion) the cost implications
and administrative impact of the change upon the PAs duties and responsibilities
in sufficient detail as needed by the INC.
   
    
    Notify all interested parties when guidelines have changed.
    
    Interpret guideline changes and impact upon processes.
    
    Identify implementation date or effective date.
    
    Provide notification of new forms or tools that may be required.
    
    Identify a Single Point of Contact (SPOC) within the PA to answer questions.
  
 1
    
    FCC Contract Number CON07000005 © NeuStar, Inc. 2008
    
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Natl PAS  Change Order #2  Block Reservations
    
    June 13, 2008
  2 Industry Numbering Committee (INC) Issue
  INC Issue Statement:
  3 Industry Numbering Committee (INC) Resolution
 Update TBPAG to Limit Timeframe for Block Reservations
 Resolution from INC:
 The following text changes were made to the noted sections within the TBPAG:
 © NeuStar, Inc. 2008
    
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Natl PAS  Change Order #2  Block Reservations
    
    June 13, 2008
 3.12
    
    An SP may request to reserve a block(s) when a safety valve waiver request has been submitted
to the appropriate regulatory authority. The SP shall provide a statement of certification
including the date the waiver was submitted, the denial tracking number from PAS for the
waiver request (if available) and the tracking number from PAS of the reservation request to
the PA via fax or email. Blocks shall remain in a reserved status for three (3) months from
the date the Part 3 is approved for the block reservation request, unless the block is
assigned or the reservation is canceled or extended prior to the block reservation
expiration date. An SP may request one three-month reservation extension if the appropriate
regulatory authority has not acted upon the SPs waiver request by the original block
reservation expiration date. An SP shall cancel its block(s) reservation immediately when the
SP determines that it no longer needs the block(s) or the appropriate regulatory authority
denies the SPs waiver request. [Issue 578]4.5
    
    An SP may request to reserve a block(s) when a safety valve waiver request has been submitted
to the appropriate regulatory authority. The SP shalf provide a statement of certification
including the date the waiver was submitted, the denial tracking number from PAS for the
waiver request (if available) and the tracking number from PAS of the reservation request to
the PA via fax or email. Blocks shall remain in a reserved status for three (3) months from
the date the Part 3 is approved for the block reservation request, unless the block
is assigned or the reservation is canceled orextended prior to the block
reservation expiration date. An SP may request one three-month reservation extension if the
appropriate regulatory authority has not acted upon the SPs waiver request by the original
block reservation expiration date. An SP shall cancel its block(s) reservation immediately
when the SP determines that it no longer needs the block(s) or the appropriate regulatory
authority denies the SPs.waiver request. [Issue 578]8.3.5
    
    The following criteria shall be used by the PA in reviewing a thousands-block reservation
request from an SP that has submitted a safety valve waiver to the appropriate regulatory
authority:
 a)
    
    The applicant shall provide a statement of certification including the
date the waiver was submitted, the denial tracking number for the waiver request
from PAS (if available) and the tracking number from PAS of the reservation request
to the PA via fax or email.b)
    
    The PA shall process requests for block reservations within 7 calendar
days of receiving the request.c)
    
    Blocks shall remain in a reserved status for .three (3) months from the
date the Part 3 is approved for the block reservation request, unless the block is
assigned, or the reservation is canceled or extended prior to the block reservation
expiration date.
 © NeuStar, Inc. 2008
    
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Natl PAS  Change Order #2  Block Reservations
    
    June 13, 2008
 d)
    
    The PA shall send an e-mail reminder to the SP 7 calendar days prior to the block
reservation expiration date, advising the SP that the reserved block will be placed back
into the pool one (1) calendar day after the block reservation expiration date if the
reserved block has not been assigned or the reservation has not been canceled or
extended.
 [Issue 578]
 4 The Proposed Solution
 The National Pooling Administrator has reviewed the changes to the TBPAG to determine whether and
how it will impact either the pooling operations or the Pooling Administration System (PAS). As a
result of our assessment, we developed the following proposed solution to address the changes that
the INC recommended, in a cost-effective and efficient manner.Under the amendments to the TBPAG relating to reserved blocks, PAS will be modified to change the
block reservation timeframe from six months to three months. Also, to address the additional tasks
contained in the amendments to the TBPAG, PAS will be modified to allow the SP to request a one
time three-month extension for blocks previously reserved that have not yet passed the block
reservation expiration date. There will be no documentation required from the SPs for this
extension request. PAS must be further modified to automatically send an email notice to the SP
seven calendar days prior to the block reservation expiration date informing the SP that the blocks
currently reserved will be placed back into the pool one calendar day after the block reservation
expiration date if the SP has not requested (1) that the reserved block be either assigned or
extended, or (2) that the reservation be canceled.Block reservations are allowed only for safety
valve waiver requests.User manuals will be
updated as appropriate.
 5 Assumptions and Risks
   6 Cost
  © NeuStar, Inc. 2008
    
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Natl PAS  Change Order #2  Block Reservations
    
    June 13, 2008
   7 Conclusion
  © NeuStar, Inc. 2008
    
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