Library
Current regex:
SSN regex PHP
PHP

PHP

ZIP code regex PHP
ZIP code
XML regex PHP
XML
UUID regex PHP
UUID
URL regex PHP
URL
Street address regex PHP
Street address
SSN regex PHP
SSN
Regex match words PHP
Words match
Phone number regex PHP
Phone number
Password regex PHP
Password
Numbers only regex (digits only) PHP
Numbers only (digits only)
IP address regex PHP
IP address
Mac address regex PHP
Mac address
HTML regex PHP
HTML
GUID regex PHP
GUID
Email regex PHP
Email
Date regex PHP
Date
SSN regex PHP

SSN

SSN stands for social security number and is issued to US citizens, permanent and temporary residents.

JavaScript
JavaScript
Python
Python
Java
Java
C#
C#
PHP
PHP

SSN regex

This number has the following rules:

  • consists of 9 digits and usually divided by 3 parts by hyphen (XXX-XX-XXXX).
  • The first part can not be 000, 666, or between 900-900.
  • Second part can not be 00
  • Third part can not be 0000

Below is a simple SSN regular expression that is divided by hyphens.

  • If you want to make hyphens optional, put ? after each dash
  • If you want to validate SSN without hyphens - just remove them
"/^(?!666|000|9\\d{2})\\d{3}-(?!00)\\d{2}-(?!0{4})\\d{4}$/"

Test it!
/^(?!666|000|9\d{2})\d{3}-(?!00)\d{2}-(?!0{4})\d{4}$/

True

False

Enter a text in the input above to see the result

Example code in PHP:

// Validate SSN
$ssn_validation_regex = '/^(?!666|000|9\\d{2})\\d{3}-(?!00)\\d{2}-(?!0{4})\\d{4}$/'; 
echo preg_match($ssn_validation_regex, '100-22-3333'); // returns 1

// Extract SSN from a string
$extract_ssn_pattern = '/(?!666|000|9\\d{2})\\d{3}-(?!00)\\d{2}-(?!0{4})\\d{4}/'; 
$string_to_match = 'My SSN is 100-22-3333';
preg_match_all($extract_ssn_pattern, $string_to_match, $matches);
print_r($matches[0]) // matches[0] is ['100-22-3333']
Test it!

True

False

Enter a text in the input above to see the result

Test it!

True

False

Enter a text in the input above to see the result