this post was submitted on 16 Aug 2024
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privacy
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Is usa numbering just incremental? Canadian ones use a checksum type setup to determine if it is a valid SIN
There's some brackets based on area and similar https://www.ssa.gov/history/ssn/geocard.html
First 3 digits are the area number assigned to a geographic. Next 2 are a group number and are not used serially but have a rather unusual usage sequence. The last 4 are a serial number assigned in order.