To contact Service Canada Social Insurance office for your SIN application inquiry, please call:

in Canada

  • 1-866-274-6627
  • TTY: 1-800-926-9105

outside Canada

  • 1-506-548-7961
NOTE* The agent at the local Service Canada centre are able to issue SIN as general agent. In a situation where your SIN application or request requires further attention from SIN head office, your file will be referred directly to SIN head office. Under this circumstances, the local Service Canada will no longer hold your file. You must contact SIN head office for any further request.
By Mail
Service Canada
Social Insurance Registration Office
PO Box 7000
Bathurst NB  E2A 4T1
For more information on how to protect yourself from fraud and identity theft, visit the following websites: