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System Identifiers

In Canada, the Canadian Numbering Administrator (CNA) undertakes the primary administrative functions for all System Identifier (SID) resources. The CNA administers SID resources in accordance with the Canadian System Identifier (SID) Assignment Guideline developed by the Canadian Steering Committee on Numbering and approved by the Canadian Radio-television and Telecommunications Commission (CRTC).

The approved Canadian System Identifier Assignment Guideline can be found on the CRTC website.

The administration of SIDs in Canada is conducted under the regulatory authority of the CRTC.


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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