# US SSN Validator Validate United States Social Security Number (SSN) format with area number verification > Canonical page: https://elysiatools.com/en/tools/us-ssn-validator - **Category:** Validation - **Keywords:** ssn, social security, number, us, usa, validator, tax, id, federal ## Overview The US SSN Validator is a tool that checks the format and area number of United States Social Security Numbers. It verifies that SSNs follow the standard XXX-XX-XXXX pattern and ensures the first three digits correspond to a valid area code, helping to catch errors in data entry or verification processes. ## Inputs - **SSN** (text): Enter Social Security Number (e.g., 123-45-6789)... ## When to use - When onboarding employees and need to validate SSNs for payroll or tax forms. - During data cleaning or migration to ensure SSN fields are correctly formatted and contain valid area codes. - For compliance checks in financial services or government applications where SSN accuracy is critical. ## How it works - Enter the SSN in the input field, accepting formats like '123-45-6789' or '123456789'. - The tool parses the SSN to check for the correct nine-digit structure with optional hyphens. - It validates the area number (first three digits) against known valid ranges assigned by the Social Security Administration. - Outputs a text result indicating whether the SSN is valid or invalid, with details on format or area code issues. ## Use cases - HR departments validating employee SSNs during hiring to prevent payroll errors. - Financial institutions verifying customer SSNs for account opening or loan applications. - Data analysts cleaning datasets that contain SSN fields to improve data quality. ## Frequently asked questions ### What is a US Social Security Number? A US SSN is a nine-digit identifier issued to individuals for tax and social security purposes in the United States. ### How does the tool verify the area number? It checks the first three digits of the SSN against a list of valid area codes to ensure they are assigned and not reserved or invalid. ### Can this tool validate SSNs from other countries? No, it is specifically designed for United States Social Security Numbers only. ### What input formats are supported? The tool accepts SSNs as a continuous string of nine digits or with hyphens in the XXX-XX-XXXX format. ### Does the tool verify if an SSN is assigned to a specific person? 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