Are you a Canadian carrier? Complete the form to see if you are eligible to join the CST-GA.


Any Canadian Carrier, with a current year DCS and direct access to Canadian Telephone Numbers can participate in the call authentication scheme. For more information, please contact us.

See if you are eligible to join

Become An authorized Certification Authority

Am I eligible to join the CST-GA?

Please complete the form below to find out if you are eligible to become a member of the CST-GA. Required*

Become an authorized Certification Authority

Please review the CST-GA Certificate Policy, complete the form below and then submit your Certificate Practice Statement (CPS). Required*.

  • Accepted file types: doc, docx, pdf.


Contact Us

If you have a question or would like to learn more information about the CST-GA , please do not hesitate to reach out.