Illinois Social Security Numbers

Social Security Numbers issued to Illinois fall between 318-##-#### and 361-##-####.

Use the SSN Search Tool to check individual Social Security Numbers.

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About this Data

SSNs issued before June 25, 2011 are linked to where the number was issued which is often the same as where the cardholder was born. After 2011, SSN issuance was randomized. Not every SSN in the range above is necessarily valid. Learn More >

Illinois SSNs by Year

Within the 318-##-#### to 361-##-#### group, the 4th and 5th digits indicate when a number was issued.

Social Security Number	First Year Issued	Last Year Issued	Estimated Age of Cardholder	Valid SSN?
339-80-####	1988	unknown	30 to 38 yrs	Valid
339-82-####	1989	1992	34 to 37 yrs	Valid
339-84-####	1989	1992	34 to 37 yrs	Valid
339-86-####	1989	1992	34 to 37 yrs	Valid
339-88-####	1993	unknown	25 to 33 yrs	Valid
339-90-####	1994	unknown	24 to 32 yrs	Valid
339-92-####	1996	1998	28 to 30 yrs	Valid
339-94-####	1998	unknown	20 to 28 yrs	Valid
339-96-####	1999	2000	26 to 27 yrs	Valid
339-98-####	2001	unknown	17 to 25 yrs	Valid
340-01-####	1936	1950	88 to 106 yrs	Valid
340-02-####	2003	2005	21 to 23 yrs	Valid
340-03-####	1936	1950	88 to 106 yrs	Valid
340-04-####	2005	2007	19 to 21 yrs	Valid
340-05-####	1936	1950	88 to 106 yrs	Valid
340-06-####	2007	2009	17 to 19 yrs	Valid
340-07-####	1936	1950	88 to 106 yrs	Valid
340-08-####	2009	2011	15 to 17 yrs	Valid
340-09-####	1936	1950	88 to 106 yrs	Valid
340-10-####	1936	1950	88 to 106 yrs	Valid
340-11-####	2011	unknown	7 to 15 yrs	Valid
340-12-####	1936	1950	88 to 106 yrs	Valid
340-14-####	1936	1950	88 to 106 yrs	Valid
340-16-####	1936	1950	88 to 106 yrs	Valid
340-18-####	1936	1950	88 to 106 yrs	Valid
340-20-####	1936	1950	88 to 106 yrs	Valid
340-22-####	1936	1950	88 to 106 yrs	Valid
340-24-####	1936	1950	88 to 106 yrs	Valid
340-26-####	1936	1950	88 to 106 yrs	Valid
340-28-####	1951	1952	86 to 91 yrs	Valid
340-30-####	1953	1954	84 to 89 yrs	Valid
340-32-####	1955	1956	82 to 87 yrs	Valid
340-34-####	1957	1959	79 to 85 yrs	Valid
340-36-####	1960	1961	77 to 82 yrs	Valid
340-38-####	1962	unknown	68 to 80 yrs	Valid
340-40-####	1963	1964	74 to 79 yrs	Valid
340-42-####	1965	unknown	65 to 77 yrs	Valid
340-44-####	1966	unknown	64 to 76 yrs	Valid
340-46-####	1967	1968	70 to 75 yrs	Valid
340-48-####	1969	unknown	61 to 73 yrs	Valid
340-50-####	1970	unknown	60 to 72 yrs	Valid
340-52-####	1971	unknown	59 to 71 yrs	Valid
340-54-####	1972	unknown	58 to 70 yrs	Valid
340-56-####	1973	unknown	57 to 69 yrs	Valid
340-58-####	1974	unknown	56 to 68 yrs	Valid
340-60-####	1975	unknown	55 to 67 yrs	Valid
340-62-####	1976	unknown	54 to 66 yrs	Valid
340-64-####	1977	unknown	53 to 65 yrs	Valid
340-66-####	1978	1979	59 to 64 yrs	Valid
340-68-####	1980	unknown	50 to 62 yrs	Valid

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