Canadian Radio-television and Telecommunications Commission
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Canadian Steering Committee on Numbering: Guidelines and Numbering Links


Canadian Numbering and Dialing Plan

CSCN Adjunct to the CISC Administrative Guidelines

Numbering Plan exhaust issues

  • Central Office Code (NXX) Assignment Guideline, Version 10.1 dated 29 April 2015
    • Part 1 - (MS Word) Central Office Assignment Request Forms
    • Part 2 - (MS Word) Routing and Rating Information
    • Part 3 - (MS Word) Administrator's Response/Confirmation Form
    • Part 4 - (MS Word) Confirmation of Code Activation Form
    • Appendix A - (MS Word) Audits
    • Appendix B - (MS Word) Months to Exhaust Certification Worksheet (14 May 2010)
    • Appendix C - (MS Word) Timelines
    • Appendix D - (MS Word) Plant Test Codes
    • Appendix E - (MS Word) Location Routing Numbers
    • Appendix F - (MS Word) Aging and Administration of Disconnected Telephone Numbers
    • Appendix G - (MS Word) Reserved and Held Telephone Numbers - 29 September 2003
    • Appendix H - (MS Word) Special Administrative Practises with respect to Failing Service Providers

800 Toll Free calling issues

Canadian Adjunct

Miscellaneous Guidelines

Other numbering guidelines on Canadian Numbering Administrator (CNA) website include

Other numbering links

Alliance for Telecommunications Industry Solutions (ATIS)
Canadian Local Number Portability Consortium (CLNPC)
Canadian Numbering Administration Consortium (CNAC)
Industry Numbering Committee (INC)
International Telecommunications Union (ITU)
National Exchange Carriers Association (NECA)
North American Numbering Council (NANC)
North American Numbering Council (NANC) Chair Website
North American Numbering Plan Administration (NANPA)
Number Portability Administration Center (NPAC)
Telcordia Routing Administration