Colorado Social Security Numbers

Social Security Numbers issued to Colorado fall between 521-##-#### and 653-##-####.

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 >

Colorado SSNs by Year

Within the 521-##-#### to 653-##-#### 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?
522-02-####	1973	unknown	55 to 67 yrs	Valid
522-03-####	1936	1950	86 to 104 yrs	Valid
522-04-####	1974	unknown	54 to 66 yrs	Valid
522-05-####	1936	1950	86 to 104 yrs	Valid
522-06-####	1974	unknown	54 to 66 yrs	Valid
522-07-####	1936	1950	86 to 104 yrs	Valid
522-08-####	1975	unknown	53 to 65 yrs	Valid
522-09-####	1936	1950	86 to 104 yrs	Valid
522-10-####	1936	1950	86 to 104 yrs	Valid
522-11-####	1975	unknown	53 to 65 yrs	Valid
522-12-####	1936	1950	86 to 104 yrs	Valid
522-13-####	1975	unknown	53 to 65 yrs	Valid
522-14-####	1936	1950	86 to 104 yrs	Valid
522-15-####	1976	unknown	52 to 64 yrs	Valid
522-16-####	1936	1950	86 to 104 yrs	Valid
522-17-####	1976	unknown	52 to 64 yrs	Valid
522-18-####	1936	1950	86 to 104 yrs	Valid
522-19-####	1977	unknown	51 to 63 yrs	Valid
522-20-####	1936	1950	86 to 104 yrs	Valid
522-21-####	1977	unknown	51 to 63 yrs	Valid
522-22-####	1936	1950	86 to 104 yrs	Valid
522-23-####	1978	unknown	50 to 62 yrs	Valid
522-24-####	1936	1950	86 to 104 yrs	Valid
522-25-####	1979	unknown	49 to 61 yrs	Valid
522-26-####	1936	1950	86 to 104 yrs	Valid
522-27-####	1980	unknown	48 to 60 yrs	Valid
522-28-####	1936	1950	86 to 104 yrs	Valid
522-29-####	1980	unknown	48 to 60 yrs	Valid
522-30-####	1936	1950	86 to 104 yrs	Valid
522-31-####	1981	unknown	47 to 59 yrs	Valid
522-32-####	1936	1950	86 to 104 yrs	Valid
522-33-####	1982	unknown	46 to 58 yrs	Valid
522-34-####	1936	1950	86 to 104 yrs	Valid
522-35-####	1982	unknown	46 to 58 yrs	Valid
522-36-####	1936	1950	86 to 104 yrs	Valid
522-37-####	1983	unknown	45 to 57 yrs	Valid
522-38-####	1936	1950	86 to 104 yrs	Valid
522-39-####	1983	unknown	45 to 57 yrs	Valid
522-40-####	1936	1950	86 to 104 yrs	Valid
522-41-####	1984	unknown	44 to 56 yrs	Valid
522-42-####	1951	unknown	77 to 89 yrs	Valid
522-43-####	1984	unknown	44 to 56 yrs	Valid
522-44-####	1952	unknown	76 to 88 yrs	Valid
522-45-####	1985	unknown	43 to 55 yrs	Valid
522-46-####	1953	1954	82 to 87 yrs	Valid
522-47-####	1985	unknown	43 to 55 yrs	Valid
522-48-####	1955	unknown	73 to 85 yrs	Valid
522-49-####	1986	unknown	42 to 54 yrs	Valid
522-50-####	1956	unknown	72 to 84 yrs	Valid
522-51-####	1986	unknown	42 to 54 yrs	Valid

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