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?
345-20-####	1936	1950	87 to 105 yrs	Valid
345-22-####	1936	1950	87 to 105 yrs	Valid
345-24-####	1936	1950	87 to 105 yrs	Valid
345-26-####	1936	1950	87 to 105 yrs	Valid
345-28-####	1951	1952	85 to 90 yrs	Valid
345-30-####	1953	1955	82 to 88 yrs	Valid
345-32-####	1956	1957	80 to 85 yrs	Valid
345-34-####	1958	1959	78 to 83 yrs	Valid
345-36-####	1960	1961	76 to 81 yrs	Valid
345-38-####	1962	unknown	67 to 79 yrs	Valid
345-40-####	1963	1964	73 to 78 yrs	Valid
345-42-####	1965	unknown	64 to 76 yrs	Valid
345-44-####	1966	unknown	63 to 75 yrs	Valid
345-46-####	1967	1968	69 to 74 yrs	Valid
345-48-####	1969	unknown	60 to 72 yrs	Valid
345-50-####	1970	unknown	59 to 71 yrs	Valid
345-52-####	1971	unknown	58 to 70 yrs	Valid
345-54-####	1972	unknown	57 to 69 yrs	Valid
345-56-####	1973	unknown	56 to 68 yrs	Valid
345-58-####	1974	unknown	55 to 67 yrs	Valid
345-60-####	1975	unknown	54 to 66 yrs	Valid
345-62-####	1976	unknown	53 to 65 yrs	Valid
345-64-####	1977	unknown	52 to 64 yrs	Valid
345-66-####	1978	1979	58 to 63 yrs	Valid
345-68-####	1980	unknown	49 to 61 yrs	Valid
345-70-####	1981	1982	55 to 60 yrs	Valid
345-72-####	1983	1984	53 to 58 yrs	Valid
345-74-####	1985	unknown	44 to 56 yrs	Valid
345-76-####	1986	unknown	43 to 55 yrs	Valid
345-78-####	1987	unknown	42 to 54 yrs	Valid
345-80-####	1988	unknown	29 to 37 yrs	Valid
345-82-####	1989	1992	33 to 36 yrs	Valid
345-84-####	1989	1992	33 to 36 yrs	Valid
345-86-####	1989	1992	33 to 36 yrs	Valid
345-88-####	1993	unknown	24 to 32 yrs	Valid
345-90-####	1995	unknown	22 to 30 yrs	Valid
345-92-####	1996	1998	27 to 29 yrs	Valid
345-94-####	1998	unknown	19 to 27 yrs	Valid
345-96-####	2000	unknown	17 to 25 yrs	Valid
345-98-####	2001	unknown	16 to 24 yrs	Valid
346-01-####	1936	1950	87 to 105 yrs	Valid
346-02-####	2003	2005	20 to 22 yrs	Valid
346-03-####	1936	1950	87 to 105 yrs	Valid
346-04-####	2005	2007	18 to 20 yrs	Valid
346-05-####	1936	1950	87 to 105 yrs	Valid
346-06-####	2007	2009	16 to 18 yrs	Valid
346-07-####	1936	1950	87 to 105 yrs	Valid
346-08-####	2009	2011	14 to 16 yrs	Valid
346-09-####	1936	1950	87 to 105 yrs	Valid
346-10-####	1936	1950	87 to 105 yrs	Valid

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