Colorado Social Security Numbers

Social Security Numbers issued to Colorado fall between 521-01-0001 and 653-99-9999.

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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.

Social Security Number	First Year Issued	Last Year Issued	Estimated Age of Cardholder	Valid SSN?
521-01-xxxx	1950	1950	81 to 99 yrs	Valid
521-02-xxxx	unknown	unknown	50 to 62 yrs	Valid
521-03-xxxx	1950	1950	81 to 99 yrs	Valid
521-04-xxxx	unknown	unknown	49 to 61 yrs	Valid
521-05-xxxx	1950	1950	81 to 99 yrs	Valid
521-06-xxxx	unknown	unknown	49 to 61 yrs	Valid
521-07-xxxx	1950	1950	81 to 99 yrs	Valid
521-08-xxxx	unknown	unknown	49 to 61 yrs	Valid
521-09-xxxx	1950	1950	81 to 99 yrs	Valid
521-10-xxxx	1950	1950	81 to 99 yrs	Valid
521-11-xxxx	unknown	unknown	48 to 60 yrs	Valid
521-12-xxxx	1950	1950	81 to 99 yrs	Valid
521-13-xxxx	unknown	unknown	48 to 60 yrs	Valid
521-14-xxxx	1950	1950	81 to 99 yrs	Valid
521-15-xxxx	unknown	unknown	47 to 59 yrs	Valid
521-16-xxxx	1950	1950	81 to 99 yrs	Valid
521-17-xxxx	unknown	unknown	47 to 59 yrs	Valid
521-18-xxxx	1950	1950	81 to 99 yrs	Valid
521-19-xxxx	unknown	unknown	46 to 58 yrs	Valid
521-20-xxxx	1950	1950	81 to 99 yrs	Valid
521-21-xxxx	unknown	unknown	46 to 58 yrs	Valid
521-22-xxxx	1950	1950	81 to 99 yrs	Valid
521-23-xxxx	unknown	unknown	45 to 57 yrs	Valid
521-24-xxxx	1950	1950	81 to 99 yrs	Valid
521-25-xxxx	unknown	unknown	44 to 56 yrs	Valid
521-26-xxxx	1950	1950	81 to 99 yrs	Valid
521-27-xxxx	unknown	unknown	44 to 56 yrs	Valid
521-28-xxxx	1950	1950	81 to 99 yrs	Valid
521-29-xxxx	unknown	unknown	43 to 55 yrs	Valid
521-30-xxxx	1950	1950	81 to 99 yrs	Valid
521-31-xxxx	unknown	unknown	42 to 54 yrs	Valid
521-32-xxxx	1950	1950	81 to 99 yrs	Valid
521-33-xxxx	unknown	unknown	42 to 54 yrs	Valid
521-34-xxxx	1950	1950	81 to 99 yrs	Valid
521-35-xxxx	unknown	unknown	41 to 53 yrs	Valid
521-36-xxxx	1950	1950	81 to 99 yrs	Valid
521-37-xxxx	unknown	unknown	40 to 52 yrs	Valid
521-38-xxxx	1950	1950	81 to 99 yrs	Valid
521-39-xxxx	unknown	unknown	40 to 52 yrs	Valid
521-40-xxxx	1950	1950	81 to 99 yrs	Valid
521-41-xxxx	unknown	unknown	39 to 51 yrs	Valid
521-42-xxxx	unknown	unknown	72 to 84 yrs	Valid
521-43-xxxx	unknown	unknown	39 to 51 yrs	Valid
521-44-xxxx	unknown	unknown	71 to 83 yrs	Valid
521-45-xxxx	unknown	unknown	38 to 50 yrs	Valid
521-46-xxxx	unknown	unknown	70 to 82 yrs	Valid
521-47-xxxx	unknown	unknown	38 to 50 yrs	Valid
521-48-xxxx	unknown	unknown	69 to 81 yrs	Valid
521-49-xxxx	unknown	unknown	37 to 49 yrs	Valid
521-50-xxxx	unknown	unknown	68 to 80 yrs	Valid

Colorado Social Security Numbers

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