Welcome to the CNA Website

The CNA (Canadian Numbering Administrator) provides ...numbering administration service to the Canadian telecommunications industry under the regulatory oversight of the CRTC. CNA functions include Canadian numbering resource administration, processing applications for North American Numbering Plan (NANP) resources and other telecommunications numbering resources. <show more >

Quick Links

CO Code/Phone Number Lookup

Look up and view the status of the Central Office
Code portion of a Canadian phone number.

Canadian Area Code Maps

View and download maps of the Canadian Area
Code complexes.

CSCN and RPC Calendars

Meeting and conference call calendars for the
CSCN and Relief Planning committees.

NXX Status Listings

CO Code (NXX) status listings for each NPA.

Industry News

2026-03-26 - New TBP Implementation Page has been added to the CNA Website
2025-12-08 - Telecom Decision CRTC 2025-335 approves Non-Geographic (6YY) 1+14 digit expanded number format from CNRE152A
2025-11-28 - Telecom Decision CRTC 2025-321 Modifies the deadline for Thousands-Block Pooling
2025-10-17 - Planning Letter PL-632 details new Area Code 273 overlay to existing Area Code complex 367/418/581 in Eastern Québec
2025-10-10 - Telecom Decision CRTC 2025-269 approves new NPA 273 and a Relief Date of 2027-02-27 for relief of Area Code complex 367/418/581 in Eastern Québec
2025-09-26 - CRTC Secretary General Letter dated 2 October 2025 delays the implementation of TBP with a new implementation period to follow
2025-09-26 - Telecom Decision CRTC 2025-252 approves recommendations in CNRE144B
2025-09-02 - Telecom Decision CRTC 2025-224 approves two measures to address the high assignment rate of non-geographic (6YY) codes
2025-08-15 - Telecom Decision CRTC 2025-209 approves the sunsetting of MBIs, SIDs and 5YY NXXs
2025-08-12 - The TBP Carrier Checklist may be found on the Thousands-Block Status page in the TBP Production Testing section
2025-06-23 - Telecom Notice of Consultation CRTC 2025-155: Establishment of a CISC ad hoc committee for relief planning for area codes 782 and 902 in Nova Scotia and Prince Edward Island
2025-06-16 - Thursday 26 June 2025 the CNA CO Code status data format will be updated to include a new "Pooled" field
2025-06-02 - The CNA will start accepting applications for Thousands-Block Pooling test blocks as of Wednesday, 4 June 2025. (see here)
2025-05-24 - Area Code 257 is now in service in British Columbia covering the areas already served by Area Codes 236/257/250/604/672/778
2025-05-20 - Telecom Decision CRTC 2025-113 approves consensus report CNRE137B and directs the CNA to set aside three area codes for future relief of the identified area code complexes
2025-04-26 - Area Code 942 is now in service in Metro Toronto Ontario covering the areas already served by Area Codes 416/473/647
2025-01-20 - Telecom Notice of Consultation CRTC 2025-15: Establishment of a CISC ad hoc committee for relief planning for area codes 367, 418, and 581 in Québec
2024-12-18 - CRTC staff letter sent to CSCN supports the use of CO Code assignments to facilitate TBP implementation, end-to-end production Testing
2024-11-01 - Telecom Decision CRTC 2024-266 approves changes to the Canadian Central Office [CO] Code (NXX) Assignment Guideline and the Canadian Numbering Resource Utilization Forecast (C-NRUF) Guideline
2024-10-10 - Telecom Decision CRTC 2024-239 denies the application to review and vary Telecom Regulatory Policy CRTC 2024-26 that extending the TBP implementation deadline is not warranted
2024-02-17 - Area Code 879 is now in service in Newfoundland and Labrador covering the areas already served by Area Code 709
2024-02-05 - Telecom Regulatory Policy CRTC 2024-26 directs industry to implement thousand-block pooling in Canada by 6 October 2025. Other measures noted in the policy aim to shift the industry’s focus towards number preservation
2023-11-22 - Changes to the CO Code status data, adding province code will be implemented on 11 December 2023
2023-10-30 - CNA receives CRTC Secretary General direction to immediately implement interim measures of limiting the assignment of geographic CO Codes
2023-09-13 - Telecom Decision CRTC 2023-319 approves revised implementation date for new Area Code 879 in Newfoundland and Labrador with a Relief Date of 17 February 2024
2023-06-17 - Area Code 382 is now in service in southwestern Ontario covering the areas already served by Area Codes 226/519/548
2023-05-10 - Telecom Decision CRTC 2023-135 approves new Area Code 257 in British Columbia with a Relief Date of 24 May 2025
2023-05-10 - Telecom Decision CRTC 2023-135 approves new Area Code 942 in Toronto with a Relief Date of 26 April 2025
2023-04-29 - Area Code 428 is now in service in New Brunswick covering the areas already served by Area Code 506
2023-04-10 - NPA 633 has been assigned to Canada for Non-Geographic (6YY) purposes. See Planning Letter PL-611

The role of the Canadian Numbering Administrator (CNA) is being performed by COMsolve Inc. under contract with Canadian Numbering Administration Consortium Inc. (CNAC). The CNAC Privacy Policy and the www.cnac.ca Website Terms of Use may be found using the following links:
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