What are the SSN prefixes for Kentucky?

Kentucky was assigned the area-number range 400-407. A Social Security number issued there before 2011 begins with one of these three-digit numbers.

Does an SSN starting with 400 mean the person is from Kentucky?

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

Area numbers 400-407

area range: 1
lowest area number: 400
highest area number: 407
area numbers: 8

Kentucky was assigned the Social Security area-number range 400-407. Before SSA randomized number assignment in June 2011, any SSN beginning with one of these three-digit prefixes was issued in Kentucky, generally based on the mailing address on the application. Newer numbers are assigned randomly and no longer indicate a state.

Kentucky area-number ranges

Area-number range	Count
400-407	8

Sample Kentucky SSN patterns

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

Pattern	Estimated issued	Status
400-01-####	1936-1950	Valid
400-03-####	1936-1950	Valid
400-05-####	1936-1950	Valid
400-07-####	1936-1950	Valid
400-09-####	1936-1950	Valid
400-10-####	1936-1950	Valid
400-12-####	1936-1950	Valid
400-14-####	1936-1950	Valid
400-16-####	1936-1950	Valid
400-18-####	1936-1950	Valid
400-20-####	1936-1950	Valid
400-22-####	1936-1950	Valid
400-24-####	1936-1950	Valid
400-26-####	1936-1950	Valid
400-28-####	1936-1950	Valid
400-30-####	1936-1950	Valid
400-32-####	1936-1950	Valid
400-34-####	1937-1951	Valid
400-36-####	1938-1952	Valid
400-38-####	1940-1952	Valid
400-40-####	1941-1953	Valid
400-42-####	1942-1954	Valid
400-44-####	1943-1955	Valid
400-46-####	1945-1956	Valid

Frequently asked questions

What are the SSN prefixes for Kentucky?: Kentucky was assigned the area-number range 400-407. A Social Security number issued there before 2011 begins with one of these three-digit numbers.
Does an SSN starting with 400 mean the person is from Kentucky?: For cards issued before June 25, 2011, an SSN whose first three digits fall in Kentucky's range was issued in Kentucky, 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.