Geography[edit]
The first digit of a SIN usually identifies the province in which it was registered, as listed below. However, the government has found it necessary in the past to supply certain regions with SINs assigned to other regions
1:
Nova Scotia,
New Brunswick,
Prince Edward Island, and
Newfoundland and Labrador; new Ontario SINs are now being issued with the 1 series
2–3:
Quebec
4–5:
Ontario (excluding
Northwestern Ontario), and overseas forces
6:
Northwestern Ontario,
Manitoba,
Saskatchewan,
Alberta,
Northwest Territories, and
Nunavut
7:
British Columbia,
Yukon, and new business numbers.
8: Used exclusively for the BN (Business Number) assigned to business owners and corporations. Due to the limited number of BNs available, new BNs can start with a 7.
9: Temporary resident
0: CRA-assigned individual tax numbers, temporary tax numbers or adoption tax numbers
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