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Phone number regex
JavaScript

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Phone number regex

Phone number

The regular expressions below can be used to validate if a string is a valid phone number format and to extract a phone number from a string. Please note that this validation can not tell if a phone number actually exists.

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

The basic international phone number validation

A simple regex to validate string against a valid international phone number format without delimiters and with an optional plus sign:

/^\+?[1-9][0-9]{7,14}$/

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True

False

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Example code in Javascript

// Validate phone number
const validatePhoneNumberRegex = /^\+?[1-9][0-9]{7,14}$/;
validatePhoneNumberRegex.test('+12223334444'); // Returns true

// Extract phone number from a string
const extractPhoneRegex = /\+?[1-9][0-9]{7,14}/g;
'You can reach me out at +12223334444 and +56667778888'.match(extractPhoneRegex); // returns ['+12223334444', '+56667778888']

The more complex phone number validation

This regular expression will match phone numbers entered with delimiters (spaces, dots, brackets, etc.)

/^\+?\d{1,4}?[-.\s]?\(?\d{1,3}?\)?[-.\s]?\d{1,4}[-.\s]?\d{1,4}[-.\s]?\d{1,9}$/

Test it!
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True

False

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Example code in Javascript

var regex = /^\+?\d{1,4}?[-.\s]?\(?\d{1,3}?\)?[-.\s]?\d{1,4}[-.\s]?\d{1,4}[-.\s]?\d{1,9}$/;
regex.test('+1 (615) 243-5172'); // returns true

Test it!
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True

False

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Extra information about validating phone number

While validation of phone numbers using regex can give a possibility to check the format of the phone number, it does not guarantee that the number exists.

There might be also an option to leave a phone number field without any validation since some users might have:

  • More complex phone numbers with extensions
  • The different phone numbers for calling them on a different time of day