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Canadian Numbering Administrator
Administrateur de la numérotation canadienne


CNA Mandate


The mandate of the COMsolve CNA division is to provide a numbering administration service to the Canadian telecommunications industry under contract to the Canadian Numbering Administration Consortium Inc. (CNAC) The administration of Canadian numbering resources is under the regulatory oversight of the Canadian Radio-television and Telecommunications Commission (CRTC). CNA functions include Canadian numbering resource administration and the processing of applications for North American Numbering Plan (NANP) resources and other telecommunications numbering resources by telecommunications service providers (our customers).

Numbering resources are administered in accordance with CRTC-approved guidelines including the Canadian Central Office Code Assignment Guideline and applicable CRTC Decisions, Orders, and Telecom Regulatory Policy decisions.

Canada is part of Country Code 1 and participates in the North American Number Plan (NANP) with the USA and 17 Caribbean nations. The NANP structure consists of a single digit Country Code followed by a 10 digit number containing a 3 digit Number Plan Area (called an NPA or Area code), a 3 digit Central Office (CO) Code, and a 4 digit Line Number.  The format is NXX-NXX-XXXX where N = 2 to 9 and X = 0 to 9 (e.g., the CNA number is 1-613-702-0016 where 1 is the Country Code, 613 is the NPA, 702 is the CO Code, and 0016 is the Line Number).  The "N" format permits the use of 0 and 1 for special dialing purposes (e.g., for operator assisted and long distance calling).

COMsolve CNA Division Quality Policy

The COMsolve CNA division is committed to meeting the needs of its customers for numbering administration services. Priority is placed on: (a) quality and timeliness of numbering administration services; and (b) the safeguarding (i.e. maintaining the data integrity) of confidential information provided by code applicants, code holders and service users.

The COMsolve CNA division is also committed to future quality improvements through (a) its participation in Canadian industry stakeholder groups including the Canadian Steering Committee on Numbering (CSCN) and CNAC; and (b) internal reviews. Using these external inputs and internal reviews, the COMsolve CNA division is committed to the continual improvement of the Quality Management System.

CNA Services

CSCN Secretary

The CNA will perform the functions of the CSCN Secretary in accordance with the CSCN Administrative Guideline including:

CNA Role in North American Numbering Plan Administrator (NANPA)-Administered Resources

The CNA will perform the following functions with respect to the NANP number resources which are administered by the NANP Administration:

  • receive, validate and forward applications from Canadian entities to NANPA for assignment of:
  1. NPA codes;
  2. International Inbound NPA 456 NXX codes;
  3. PCS/N00 NXX codes (NPA 500 NXXs) reserved for Canadian entities;
  4. NPA 900 NXX codes;
  5. NPA 800 855-XXXX line numbers;
  6. 555-XXXX line numbers; and
  7. Carrier Identification Codes (CICs).
  • maintain records for N11 Service Codes in accordance with CSCN directives;
  • establish and maintain a record of Non-Dialable Toll Points (NDTPs) in NPAs 886 and 889 assigned to Canadian entities.

Administration of Non-NANPA Administrated Numbering Resources

The CNA will perform the following number administration functions:

  • receive, validate and forward applications for SS7 Network codes and National Business Group Identifiers (NBGIs) from Canadian entities to Telcordia Technologies for assignment and maintain the associated records; and
  • receive, validate and process requests and maintain records for NPA 600 NXX codes; receive, validate and forward applications from Canadian entities to Telcordia Technologies for assignment and maintain the associated records.

Administration of Numbering Resources and NPA Relief Planning

The CNA will perform numbering resource administration functions in accordance with the applicable assignment guideline for geographic and non-geographic NPAs assigned for use in Canada including NPA relief planning functions.

Other CNA functions include:

  • maintaining and publishing the National Numbering Index (NNI), which is a report containing assignment information for Canadian numbering resources;
  • providing reports to CSCN on various numbering topics upon request;
  • providing clarification to interested parties with respect to the application of numbering resource guideline applicable in Canada;
  • investigating number assignment and administration issues, as necessary;
  • seeking resolution, as necessary, from CSCN of number assignment and administration issues;
  • participating in and provide informational support to the CSCN working groups on request;
  • liaising and coordinating the CNA's activities with the NANPA to ensure effective and efficient use of NANP resources in Canada;
  • establishing and maintain relationships with Innovation, Science and Economic Development Canada and the Commission;
  • developing and maintaining knowledge of numbering activities at the INC and assess the impacts of any INC activities on Canadian numbering and CNA functions;
  • responding to requests from participants in the Canadian telecommunications industry, Innovation, Science and Economic Development Canada, the Commission and the media about Canadian numbering resources and their administration; and
  • being the primary repository for numbering information for the Canadian telecommunications industry.

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 Website Terms of Use may be found using the following links:
Privacy Policy      Website Terms of Use

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