RegEx for validating US phone number format

Question

I searched for phone number validation and ended up with below javascript code

jQuery.validator.addMethod(\"phoneUS\", function(phone_number, element) {
      ph         


        

Answer 1

I think this question is already asked with answer as well. Check this A comprehensive regex for phone number validation

Answer 2

You can add an optional match at the end of the regex

( x\d{4})? 

Which will match x followed by digits, that is eg x1234 if it is present

• ( x\d{4})? the quantifier ? matches zero or one occurence of ( x\d{4})

The regex can be

^\(?(\d{3})\)?[-\. ]?(\d{3})[-\. ]?(\d{4})( x\d{4})?$

For example : http://regex101.com/r/sG9qJ6/1