South Dakota SSN lookup

Area numbers assigned to South Dakota fell in these old-system blocks: 503-504. Use this page to see which prefixes matched South Dakota and then check an individual number.

Area number range

503-504

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 South Dakota before you run a full lookup.

South Dakota area numbers

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

503-504

Areas 503 through 504

South Dakota SSN patterns by year

These rows show the issued area and group combinations linked to South Dakota. 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
503-01-####	1936	1950	76 to 108 yrs	Valid
503-03-####	1936	1950	76 to 108 yrs	Valid
503-05-####	1936	1950	76 to 108 yrs	Valid
503-07-####	1936	1950	76 to 108 yrs	Valid
503-09-####	1936	1950	76 to 108 yrs	Valid
503-10-####	1936	1950	76 to 108 yrs	Valid
503-12-####	1936	1950	76 to 108 yrs	Valid
503-14-####	1936	1950	76 to 108 yrs	Valid
503-16-####	1936	1950	76 to 108 yrs	Valid
503-18-####	1936	1950	76 to 108 yrs	Valid
503-20-####	1936	1950	76 to 108 yrs	Valid
503-22-####	1936	1950	76 to 108 yrs	Valid
503-24-####	1936	1950	76 to 108 yrs	Valid
503-26-####	1936	1950	76 to 108 yrs	Valid
503-28-####	1937	1951	75 to 107 yrs	Valid
503-30-####	1938	1952	74 to 106 yrs	Valid
503-32-####	1940	1953	73 to 104 yrs	Valid
503-34-####	1941	1954	72 to 103 yrs	Valid
503-36-####	1943	1955	71 to 101 yrs	Valid
503-38-####	1944	1956	70 to 100 yrs	Valid
503-40-####	1946	1957	69 to 98 yrs	Valid
503-42-####	1947	1958	68 to 97 yrs	Valid
503-44-####	1949	1959	67 to 95 yrs	Valid
503-46-####	1951	1960	66 to 93 yrs	Valid
503-48-####	1952	1961	65 to 92 yrs	Valid
503-50-####	1954	1962	64 to 90 yrs	Valid
503-52-####	1955	1963	63 to 89 yrs	Valid
503-54-####	1957	1964	62 to 87 yrs	Valid
503-56-####	1958	1965	61 to 86 yrs	Valid
503-58-####	1960	1966	60 to 84 yrs	Valid

How to use this page

If an SSN starts with one of the prefixes above, South Dakota 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: 503-01-0001

Check a South Dakota SSN

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

More lookup pages

Browse all state lookup pages

Browse the full area number directory