CanSINVerification

Canadian Social Insurance Number Verification

Verification and Sources of data

Canada's SIN Number can be verified with the Luhn Algorithm.

There are references to the geographic location based on prefix of SIN but a citation is difficult to find. Source 1

However, a SIN starting with 9 are issued to temporary workers who are neither Canadian Citizens nor Permenant Residents Source

If you suspect a SIN is being used fradudently:

https://www.canada.ca/en/employment-social-development/programs/ei/ei-list/ei-employers-sin.html#h2.2