Regex to match all us phone number formats

Question

First of all i would say i have seen many example here and googled but none found that matches all the condition i am looking for some match top 3 not below some inbetween.

Answer 1

Help yourself. Dont use a regex for this. Google release a great library to handle this specific use case: libphonenumber. There is an online demo of the lib.

public static void Main()
{
    var phoneUtil = PhoneNumberUtil.GetInstance();
    var numberProto = phoneUtil.Parse("(979) 778-0978", "US");
    var formattedPhone = phoneUtil.Format(numberProto, PhoneNumberFormat.INTERNATIONAL);
    Console.WriteLine(formattedPhone);
}

Demo on .NETFiddle