Phone Number Validation Javascript

Question

I want users to allow only phone numbers in following format

xxx-xxx-xxxx or xxxxxxxxxx all digits only . Can some one suggest a regular expression to do this ?

Answer 1

While general phone number validation is a larger problem than what you're trying to solve, I'd do the following:

var targ=phone_number_to_validate.replace(/[^\d]/g,''); // remove all non-digits
if(targ && targ.length===10) {
  // targ is a valid phone number
}

Doing it this way will validate all of the following forms:

xxxxxxxxxx
xxx-xxx-xxxx
(xxx) xxx-xxxx
etc.

Also, to trivially check for a valid U.S. area code, you can use:

if(targ.matches(/^[2-9]\d{2}/)) // targ is a valid area code

Again, this is a trivial check. For something a little more rigorous, see this List of Legal US Area Codes.

See also A comprehensive regex for phone number validation