What are the SSN prefixes for Idaho?

Idaho was assigned the area-number range 518-519. A Social Security number issued there before 2011 begins with one of these three-digit numbers.

Does an SSN starting with 518 mean the person is from Idaho?

For cards issued before June 25, 2011, an SSN whose first three digits fall in Idaho's range was issued in Idaho, 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 Idaho

Area numbers 518-519

area range: 1
lowest area number: 518
highest area number: 519
area numbers: 2

Idaho was assigned the Social Security area-number range 518-519. Before SSA randomized number assignment in June 2011, any SSN beginning with one of these three-digit prefixes was issued in Idaho, generally based on the mailing address on the application. Newer numbers are assigned randomly and no longer indicate a state.

Idaho area-number ranges

Area-number range	Count
518-519	2

Sample Idaho SSN patterns

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

Pattern	Estimated issued	Status
518-01-####	1936-1950	Valid
518-03-####	1936-1950	Valid
518-05-####	1936-1950	Valid
518-07-####	1936-1950	Valid
518-09-####	1936-1950	Valid
518-10-####	1936-1950	Valid
518-12-####	1936-1950	Valid
518-14-####	1936-1950	Valid
518-16-####	1936-1950	Valid
518-18-####	1936-1950	Valid
518-20-####	1936-1950	Valid
518-22-####	1936-1950	Valid
518-24-####	1936-1950	Valid
518-26-####	1936-1950	Valid
518-28-####	1936-1950	Valid
518-30-####	1936-1950	Valid
518-32-####	1936-1950	Valid
518-34-####	1936-1950	Valid
518-36-####	1938-1951	Valid
518-38-####	1939-1952	Valid
518-40-####	1940-1953	Valid
518-42-####	1941-1954	Valid
518-44-####	1942-1954	Valid
518-46-####	1944-1955	Valid

Frequently asked questions

What are the SSN prefixes for Idaho?: Idaho was assigned the area-number range 518-519. A Social Security number issued there before 2011 begins with one of these three-digit numbers.
Does an SSN starting with 518 mean the person is from Idaho?: For cards issued before June 25, 2011, an SSN whose first three digits fall in Idaho's range was issued in Idaho, 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.