What are the SSN prefixes for Oklahoma?

Oklahoma was assigned the area-number range 440-448. A Social Security number issued there before 2011 begins with one of these three-digit numbers.

Does an SSN starting with 440 mean the person is from Oklahoma?

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

Area numbers 440-448

area range: 1
lowest area number: 440
highest area number: 448
area numbers: 9

Oklahoma was assigned the Social Security area-number range 440-448. Before SSA randomized number assignment in June 2011, any SSN beginning with one of these three-digit prefixes was issued in Oklahoma, generally based on the mailing address on the application. Newer numbers are assigned randomly and no longer indicate a state.

Oklahoma area-number ranges

Area-number range	Count
440-448	9

Sample Oklahoma SSN patterns

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

Pattern	Estimated issued	Status
440-01-####	1936-1950	Valid
440-03-####	1936-1950	Valid
440-05-####	1936-1950	Valid
440-07-####	1936-1950	Valid
440-09-####	1936-1950	Valid
440-10-####	1936-1950	Valid
440-12-####	1936-1950	Valid
440-14-####	1936-1950	Valid
440-16-####	1936-1950	Valid
440-18-####	1936-1950	Valid
440-20-####	1936-1950	Valid
440-22-####	1936-1950	Valid
440-24-####	1936-1950	Valid
440-26-####	1938-1951	Valid
440-28-####	1940-1953	Valid
440-30-####	1941-1954	Valid
440-32-####	1943-1955	Valid
440-34-####	1945-1956	Valid
440-36-####	1947-1957	Valid
440-38-####	1948-1958	Valid
440-40-####	1950-1960	Valid
440-42-####	1952-1961	Valid
440-44-####	1954-1962	Valid
440-46-####	1955-1963	Valid

Frequently asked questions

What are the SSN prefixes for Oklahoma?: Oklahoma was assigned the area-number range 440-448. A Social Security number issued there before 2011 begins with one of these three-digit numbers.
Does an SSN starting with 440 mean the person is from Oklahoma?: For cards issued before June 25, 2011, an SSN whose first three digits fall in Oklahoma's range was issued in Oklahoma, 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.