CNA Logo


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.


Copyright 1998-2019 Canadian Numbering Administrator

Canadian Flag