Historical SSN reference
Social Security Number Prefixes by State
The first three digits of some older Social Security numbers were tied to the state or territory connected to the original application. This page explains the old system in simple language.
State and territory list
Historical SSN area numbers by state
Choose a place to see its listed ranges and the historical limit in plain language.
Plain-language explanation
What the first three digits meant
Before June 25, 2011, the first three digits were called the area number. They usually reflected the state or territory connected to the mailing address on the original application. A person could later move, so the prefix was never a current-address tracker.
Since randomization began, new SSNs are assigned without geographic meaning. This table is useful for understanding older records, not for making a modern location or identity claim.
Quick answers
SSN prefix FAQs
Do the first three digits of an SSN show the state today?
Only as a historical clue for numbers issued before June 25, 2011. Numbers issued after randomization do not have geographic meaning.
Does an SSN prefix prove where a person was born?
No. A historical area number was generally tied to the mailing address used for the original application, not necessarily birthplace or current residence.
What is an SSN area number?
The area number is the first three digits of a Social Security number. This page lists historical area-number ranges by state and territory.
Can I identify someone from an SSN prefix?
No. A prefix does not identify a person, confirm ownership or show a current address. Do not share a full Social Security number with this directory.