pcre2
E.164 ITU Telephony Standard including Extensions
Basic RegEx to catch ITU E.164 Formatted Telephone Numbers. Must include leading '+', first digit cannot be a zero, no other non-numeric characters -- with (optional) exception of Extensions denoted by ";ext=" and between 3 and 6 digits in the extension (adjust max to suit organization)
Submitted by ADWolf - 2 years ago