Javascript Regex - What to use to validate a phone number?

Question

Could anyone tell me what RegEx would work to validate an international phone number including white space between the numbers and also allowing for these chars: - ( )

Answer 1

This is a long regex, but it supports both formats (for example 2 to be a valid international number, is MUST start with either + or 00):

/^(?:(?:\(?(?:00|\+)([1-4]\d\d|[1-9]\d?)\)?)?[\-\.\ \\\/]?)?((?:\(?\d{1,}\)?[\-\.\ \\\/]?){0,})(?:[\-\.\ \\\/]?(?:#|ext\.?|extension|x)[\-\.\ \\\/]?(\d+))?$/i

This allows extensions and a multiple choice of formats and separators.

Matches:

• (+351) 282 43 50 50
• 90191919908
• 555-8909
• 001 6867684
• 001 6867684x1
• 1 (234) 567-8901
• 1-234-567-8901 x1234
• 1-234-567-8901 ext1234
• 1-234 567.89/01 ext.1234
• 1(234)5678901x1234
• (123)8575973
• (0055)(123)8575973

On $n, it saves:

1. Country indicator
2. Phone number
3. Extention

This same answer was given here: A comprehensive regex for phone number validation (direct link to my answer)