Our members are shareholders of the CST-GA – they are Canadian carriers helping to restore trust in telecommunications.

The following Canadian telecommunications companies are members of the CST-GA:


Become a Member

Any Canadian Carrier, with a current year DCS and direct access to Canadian Telephone Numbers can participate in the call authentication scheme.

Become a Certification Authority

Submit your Certificate Practice Statement (CPS) today and start the process to becoming an authorized Certification Authority.