SSN also has an approximate timestamp encoded into it. The prefix can be linked to the time period it was given out, which is typically at or near birth registration.
This is public knowledge, and the prefixes are even used for identity verification at banks.
If you got your SSN at an age other than ~0, you may get flagged as a mis-match when e.g. applying for a new bank account, and it will require a human override to get past.
