What are the SSN prefixes for California?

California was assigned the area-number ranges 545-573, 602-626. A Social Security number issued there before 2011 begins with one of these three-digit numbers.

Does an SSN starting with 545 mean the person is from California?

For cards issued before June 25, 2011, an SSN whose first three digits fall in California's range was issued in California, usually based on the mailing address on the application, not necessarily birthplace. Numbers issued after randomization carry no location meaning.

How can I check a specific number?

Use the SSN checker to enter a full number and see whether its structure is valid, which state it maps to, and a rough estimate of when it was issued.

Social Security Number Prefixes for California

Area numbers 545-573, 602-626

area ranges: 2
lowest area number: 545
highest area number: 626
area numbers: 54

California was assigned the Social Security area-number ranges 545-573, 602-626. Before SSA randomized number assignment in June 2011, any SSN beginning with one of these three-digit prefixes was issued in California, generally based on the mailing address on the application. Newer numbers are assigned randomly and no longer indicate a state.

California area-number ranges

Area-number range	Count
545-573	29
602-626	25

Sample California SSN patterns

Estimated issue years for the lowest area/group combinations (illustrative):

Pattern	Estimated issued	Status
545-01-####	1936-1950	Valid
545-03-####	1936-1950	Valid
545-05-####	1936-1950	Valid
545-07-####	1936-1950	Valid
545-09-####	1936-1950	Valid
545-10-####	1936-1950	Valid
545-12-####	1936-1950	Valid
545-14-####	1936-1950	Valid
545-16-####	1936-1950	Valid
545-18-####	1936-1950	Valid
545-20-####	1936-1950	Valid
545-22-####	1936-1950	Valid
545-24-####	1936-1950	Valid
545-26-####	1936-1950	Valid
545-28-####	1936-1950	Valid
545-30-####	1936-1950	Valid
545-32-####	1936-1950	Valid
545-34-####	1936-1950	Valid
545-36-####	1936-1950	Valid
545-38-####	1936-1950	Valid
545-40-####	1936-1950	Valid
545-42-####	1937-1951	Valid
545-44-####	1938-1951	Valid
545-46-####	1939-1952	Valid

Frequently asked questions

What are the SSN prefixes for California?: California was assigned the area-number ranges 545-573, 602-626. A Social Security number issued there before 2011 begins with one of these three-digit numbers.
Does an SSN starting with 545 mean the person is from California?: For cards issued before June 25, 2011, an SSN whose first three digits fall in California's range was issued in California, usually based on the mailing address on the application, not necessarily birthplace. Numbers issued after randomization carry no location meaning.
How can I check a specific number?: Use the SSN checker to enter a full number and see whether its structure is valid, which state it maps to, and a rough estimate of when it was issued.

Check a specific number with the SSN checker, or see all states.