Exhibit 10.2.5
 Amendment No. 68 (CA)SOW:
    
    o Yesþ No
 
 AMENDMENT NO. 68
 TO
 CONTRACTOR SERVICES AGREEMENT FOR NPAC/SMS
 FOR
 CANADIAN SERVICE AREA
 CONFIDENTIAL




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Amendment No. 68 (CA)SOW:
    
    o Yesþ No
 AMENDMENT NO. 68
 UNDER
 CONTRACTOR SERVICES AGREEMENT FOR NUMBERING
ADMINISTRATION CENTER / SERVICE MANAGEMENT SYSTEM FOR
CANADIAN SERVICE AREA
 Termination of License Royalty Fee Obligation
 1. PARTIES
 Amendment Master Agreement Contractor Customer .
 2. EFFECTIVENESS
 nd Amendment
Effective Date
 3. TERMINATION OF ROYALTY FEE OBLIGATION
 Statement of Intent
  Section 9.3 of Master Agreement
    CONFIDENTIAL




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Amendment No. 68 (CA)SOW:
    
    o Yesþ No
 Exhibit L to Master Agreement
     Article 32 of Master Agreement
  ARTICLE 32  REVISION TO ADDITIONAL TERMS AND CONDITIONS OF SOFTWARE LICENSE
   (i)
    
    subject to paragraph (ii) immediately below, the license
rights to the Canadian NP AC/SMS Software shall not include the use of
functionality not purchased under a Statement of Work with Contractor. After
the conclusion of any Extension Period (as defined in Article 24 of the
Contractor Services Agreement), Contractor shall have the right to audit Users
for compliance with the foregoing;
 (ii)
    
    the license to the Canadian NP AC/SMS Software under Article
9 of the Agreement shall, for greater certainty, include: (A) any Maintenance
Modifications created by Contractor during an Extension Period; (B) any
Enhancements that are subject to
 CONFIDENTIAL




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Amendment No. 68 (CA)SOW:
    
    o Yesþ No
  4. APPLICABLE DOCUMENTS
  N/A
    
    Functional Requirements SpecificationsN/A
    
    Requirements Traceability MatrixN/A
    
    External DesignN/A
    
    System DesignN/A
    
    Detailed DesignN/A
    
    Integration Test PlanN/A
    
    System Test PlanN/A
    
    Software Quality Assurance Program ReportN/A
    
    User DocumentationN/A
    
    Software Configuration Management PlanN/A
    
    Standards and Metrics
 5. IMPACTS ON MASTER AGREEMENT
  þ
    
    Master AgreementNone
    
    Exhibit B Functional Requirements SpecificationNone
    
    Exhibit C Interoperable Interface SpecificationNone
    
    Exhibit E Pricing SchedulesNone
    
    Exhibit F Project Plan and Test ScheduleNone
    
    Exhibit G Service Level RequirementsNone
    
    Exhibit H Reporting and Monitoring RequirementsNone
    
    Exhibit I Key PersonnelNone
    
    Exhibit J User Agreement FormNone
    
    Exhibit K External Designþ
    
    Exhibit L Additional Terms and Conditions of Software LicenseNone
    
    Exhibit M Software Escrow AgreementNone
    
    Exhibit O Statement of Work Cost Principles
 CONFIDENTIAL




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Amendment No. 68 (CA)SOW:
    
    o Yesþ No
 6. MISCELLANEOUS
 Counterparts
  Continuation of Master Agreement and User Agreement
  Entire Agreement
  [THIS SPACE INTENTIONALLY LEFT BLANK]
 CONFIDENTIAL




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Amendment No. 68 (CA)SOW:
    
    o Yesþ No
  CONTRACTOR:NeuStar, Inc.Signature:
    /s/ Michael OConnorName:
    MICHAEL OCONNORTitle:
    VP-CUSTOMER RELATIONS NSRCUSTOMER:Canadian LNP Consortium Inc.Signature:

    /s/ JACQUES SARRAZINName:
    JR SARRAZINTitle:
    PRESIDENT CONFIDENTIAL