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


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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?
521-01-#### 1936 1950 82 to 100 yrs Valid
521-02-#### 1973 unknown 51 to 63 yrs Valid
521-03-#### 1936 1950 82 to 100 yrs Valid
521-04-#### 1974 unknown 50 to 62 yrs Valid
521-05-#### 1936 1950 82 to 100 yrs Valid
521-06-#### 1974 unknown 50 to 62 yrs Valid
521-07-#### 1936 1950 82 to 100 yrs Valid
521-08-#### 1974 unknown 50 to 62 yrs Valid
521-09-#### 1936 1950 82 to 100 yrs Valid
521-10-#### 1936 1950 82 to 100 yrs Valid
521-11-#### 1975 unknown 49 to 61 yrs Valid
521-12-#### 1936 1950 82 to 100 yrs Valid
521-13-#### 1975 unknown 49 to 61 yrs Valid
521-14-#### 1936 1950 82 to 100 yrs Valid
521-15-#### 1976 unknown 48 to 60 yrs Valid
521-16-#### 1936 1950 82 to 100 yrs Valid
521-17-#### 1976 unknown 48 to 60 yrs Valid
521-18-#### 1936 1950 82 to 100 yrs Valid
521-19-#### 1977 unknown 47 to 59 yrs Valid
521-20-#### 1936 1950 82 to 100 yrs Valid
521-21-#### 1977 unknown 47 to 59 yrs Valid
521-22-#### 1936 1950 82 to 100 yrs Valid
521-23-#### 1978 unknown 46 to 58 yrs Valid
521-24-#### 1936 1950 82 to 100 yrs Valid
521-25-#### 1979 unknown 45 to 57 yrs Valid
521-26-#### 1936 1950 82 to 100 yrs Valid
521-27-#### 1979 unknown 45 to 57 yrs Valid
521-28-#### 1936 1950 82 to 100 yrs Valid
521-29-#### 1980 unknown 44 to 56 yrs Valid
521-30-#### 1936 1950 82 to 100 yrs Valid
521-31-#### 1981 unknown 43 to 55 yrs Valid
521-32-#### 1936 1950 82 to 100 yrs Valid
521-33-#### 1981 unknown 43 to 55 yrs Valid
521-34-#### 1936 1950 82 to 100 yrs Valid
521-35-#### 1982 unknown 42 to 54 yrs Valid
521-36-#### 1936 1950 82 to 100 yrs Valid
521-37-#### 1983 unknown 41 to 53 yrs Valid
521-38-#### 1936 1950 82 to 100 yrs Valid
521-39-#### 1983 unknown 41 to 53 yrs Valid
521-40-#### 1936 1950 82 to 100 yrs Valid
521-41-#### 1984 unknown 40 to 52 yrs Valid
521-42-#### 1951 unknown 73 to 85 yrs Valid
521-43-#### 1984 unknown 40 to 52 yrs Valid
521-44-#### 1952 unknown 72 to 84 yrs Valid
521-45-#### 1985 unknown 39 to 51 yrs Valid
521-46-#### 1953 unknown 71 to 83 yrs Valid
521-47-#### 1985 unknown 39 to 51 yrs Valid
521-48-#### 1954 unknown 70 to 82 yrs Valid
521-49-#### 1986 unknown 38 to 50 yrs Valid
521-50-#### 1955 unknown 69 to 81 yrs Valid

** This Document Provided By SSN-Verify.com **
Source: //www.ssn-verify.com/lookup/colorado