SSN Validator
Online US Social Security Number (SSN) validator. Check format and SSA numbering constraints.
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How does SSN validation work?
The SSN validator analyzes the length of the document (9 digits), the optional mask format (AAA-GG-SSSS), and validates the official numbering restrictions of the Social Security Administration.
A valid SSN cannot have the first section (Area Number) equal to '000', '666', or in the '900'-'999' range. The middle section (Group Number) cannot be '00', and the final section (Serial Number) cannot be '0000'. If any of these rules are broken, the document is considered invalid.