California SSN lookup

Area numbers assigned to California fell in these old-system blocks: 545-573, 602-626. Use this page to see which prefixes matched California and then check an individual number.

This is page 163 of 173. The rows on this page run from 623-78-#### to 623-39-####.

Area number range

545-573, 602-626

Published area blocks tied to this lookup page.

Area count

Distinct area numbers in this assignment block.

What this page tells you

Location match

Use these prefixes to see whether the first three digits point to California before you run a full lookup.

California area numbers

The first three digits of an old-style SSN could point to California when they fell inside one of these published ranges.

545-573

Areas 545 through 573

602-626

Areas 602 through 626

California SSN patterns by year

These rows show the issued area and group combinations linked to California. Open any pattern as a full lookup by swapping in the last four digits.

Social Security number	First year	Last year	Likely age today	Status
623-78-####	1973	1975	51 to 71 yrs	Valid
623-80-####	1975	1976	50 to 69 yrs	Valid
623-82-####	1976	1977	49 to 68 yrs	Valid
623-84-####	1977	1978	48 to 67 yrs	Valid
623-86-####	1978	1980	46 to 66 yrs	Valid
623-88-####	1979	1981	45 to 65 yrs	Valid
623-90-####	1980	1982	44 to 64 yrs	Valid
623-92-####	1981	1983	43 to 63 yrs	Valid
623-94-####	1982	1984	42 to 62 yrs	Valid
623-96-####	1983	1985	41 to 61 yrs	Valid
623-98-####	1984	1986	40 to 60 yrs	Valid
623-02-####	1985	1987	39 to 59 yrs	Valid
623-04-####	1986	1988	38 to 58 yrs	Valid
623-06-####	1986	1989	37 to 58 yrs	Valid
623-08-####	1987	1990	36 to 57 yrs	Valid
623-11-####	1988	1991	35 to 56 yrs	Valid
623-13-####	1989	1992	34 to 55 yrs	Valid
623-15-####	1989	1992	34 to 55 yrs	Valid
623-17-####	1990	1993	33 to 54 yrs	Valid
623-19-####	1991	1994	32 to 53 yrs	Valid
623-21-####	1992	1995	31 to 52 yrs	Valid
623-23-####	1993	1995	31 to 51 yrs	Valid
623-25-####	1994	1996	30 to 50 yrs	Valid
623-27-####	1995	1997	29 to 49 yrs	Valid
623-29-####	1996	1998	28 to 48 yrs	Valid
623-31-####	1998	1999	27 to 46 yrs	Valid
623-33-####	1999	2000	26 to 45 yrs	Valid
623-35-####	2000	2001	25 to 44 yrs	Valid
623-37-####	2001	2003	23 to 43 yrs	Valid
623-39-####	2002	2004	22 to 42 yrs	Valid

What this page covers

This page covers issued SSN patterns for California from 623-78-#### to 623-39-####. If you are scanning older prefixes or comparing issue-year ranges, this gives you a faster way to narrow the search.

Each row represents a valid issued area and group combination under the old system. Open any row to run a full number check and see the likely location and year range.

How to use this page

If an SSN starts with one of the prefixes above, California is a likely issue location under the old system.

To check the number further, run the full nine digits through the checker. The result page can then tell you whether the group fits the published record and what year range the number most likely falls into.

Example old-style prefix for this page: 545-01-0001

Check a California SSN

Enter a full SSN to check whether it fits the old record for California.

More lookup pages

Browse all state lookup pages

Browse the full area number directory