What are the SSN prefixes for South Dakota?

South Dakota was assigned the area-number range 503-504. A Social Security number issued there before 2011 begins with one of these three-digit numbers.

Does an SSN starting with 503 mean the person is from South Dakota?

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

Area numbers 503-504

area range: 1
lowest area number: 503
highest area number: 504
area numbers: 2

South Dakota was assigned the Social Security area-number range 503-504. Before SSA randomized number assignment in June 2011, any SSN beginning with one of these three-digit prefixes was issued in South Dakota, generally based on the mailing address on the application. Newer numbers are assigned randomly and no longer indicate a state.

South Dakota area-number ranges

Area-number range	Count
503-504	2

Sample South Dakota SSN patterns

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

Pattern	Estimated issued	Status
503-01-####	1936-1950	Valid
503-03-####	1936-1950	Valid
503-05-####	1936-1950	Valid
503-07-####	1936-1950	Valid
503-09-####	1936-1950	Valid
503-10-####	1936-1950	Valid
503-12-####	1936-1950	Valid
503-14-####	1936-1950	Valid
503-16-####	1936-1950	Valid
503-18-####	1936-1950	Valid
503-20-####	1936-1950	Valid
503-22-####	1936-1950	Valid
503-24-####	1936-1950	Valid
503-26-####	1936-1950	Valid
503-28-####	1937-1951	Valid
503-30-####	1938-1952	Valid
503-32-####	1940-1953	Valid
503-34-####	1941-1954	Valid
503-36-####	1943-1955	Valid
503-38-####	1944-1956	Valid
503-40-####	1946-1957	Valid
503-42-####	1947-1958	Valid
503-44-####	1949-1959	Valid
503-46-####	1951-1960	Valid

Frequently asked questions

What are the SSN prefixes for South Dakota?: South Dakota was assigned the area-number range 503-504. A Social Security number issued there before 2011 begins with one of these three-digit numbers.
Does an SSN starting with 503 mean the person is from South Dakota?: For cards issued before June 25, 2011, an SSN whose first three digits fall in South Dakota's range was issued in South Dakota, 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.