Regex for US Social Security Number

Validates US Social Security Numbers in XXX-XX-XXXX format with basic invalid-range exclusions.

Pattern

/^(?!000|666|9\d{2})\d{3}-(?!00)\d{2}-(?!0000)\d{4}$/

Live Tester

Enter a string to test

Examples

✓ 123-45-6789

✓ 001-01-0001

✓ 768-01-1234

✗ 000-45-6789

✗ 123-00-6789

✗ 123-45-0000

Pattern Breakdown

^(?!000|666|9\d{2})\d{3} — area number (001-665, 667-899)

-(?!00)\d{2} — group number (01-99)

-(?!0000)\d{4}$ — serial number (0001-9999)

Code Snippets

Javascript

const regex = /^(?!000|666|9\d{2})\d{3}-(?!00)\d{2}-(?!0000)\d{4}$/;
regex.test("123-45-6789"); // true

Python

import re
pattern = r"^(?!000|666|9\d{2})\d{3}-(?!00)\d{2}-(?!0000)\d{4}$"
bool(re.match(pattern, "123-45-6789"))  # True

Php

$pattern = '/^(?!000|666|9\d{2})\d{3}-(?!00)\d{2}-(?!0000)\d{4}$/';
preg_match($pattern, "123-45-6789"); // 1

Related Patterns

Email Address /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/ URL /^https?:\/\/(www\.)?[a-zA-Z0-9@:%._+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([a-zA-Z0-9()@:%_+.~#?&/=-]*)$/ Phone Number (International) /^\+?[1-9]\d{1,14}$/ Phone Number (US) /^$?[2-9]\d{2}$?[-.\s]?\d{3}[-.\s]?\d{4}$/ Phone Number (EU) /^\+?[1-9][0-9]{0,3}[\s.-]?$?[0-9]{1,5}$?[\s.-]?[0-9]{1,5}[\s.-]?[0-9]{1,5}$/ IPv4 Address /^((25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)$/

Frequently Asked Questions

What is the regex for US Social Security Number?▾

The regex pattern for US Social Security Number is /^(?!000|666|9\d{2})\d{3}-(?!00)\d{2}-(?!0000)\d{4}$/. Validates US Social Security Numbers in XXX-XX-XXXX format with basic invalid-range exclusions.

How do I use the US Social Security Number regex in JavaScript?▾

In JavaScript you create the pattern with a regex literal or the RegExp constructor and call .test() to check a string against it. A ready-to-copy example is shown in the Code Snippets section above, alongside Python and PHP versions.

What does the US Social Security Number pattern match?▾

It matches strings like 123-45-6789; it rejects strings like 000-45-6789. See the Examples section above for the full list of matching and non-matching cases.