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SSNChecker Social Security Number verification and lookup

Is 521-45-0001 a valid SSN?

521-45-0001 looks valid in the public record. The likely issue location is Colorado (CO), and the year range is 1985 to 1987.

Check a Social Security number

Enter any 9-digit SSN to check format, likely issue location, and the published issue-year range.

Formats like `001010013` and `001-01-0013` both work.

Is 521-45-0001 a valid SSN?

Valid

521-45-0001 looks valid in the public record. The likely issue location is Colorado (CO), and the year range is 1985 to 1987.

Status

Valid

Matches the public SSA record.

Issue location

Colorado (CO)

Based on the first three digits of the SSN.

Issue years

1985 to 1987

Estimated first and last year for this number range.

Lookup details
SSN
521-45-0001
Area number
521
Group number
45
Serial number
0001
Last published group
99
Record window
before November 2003

What this result means

521-45-0001 fits the published pre-randomization record. The area points to Colorado (CO), and the published group history supports an issue range of 1985 to 1987.