regex - Regular expression for phone numbers

Question

I'm trying:

d{3}|d{11}|d{11}-d{1}

to match three-digit numbers, eleven-digit numbers, eleven-digit followed by a hyphen, followed by one digit. But, it only matches three digit numbers!

I also tried d{3}|d{11}|d{11}-d{1} but doesn't work.

Any ideas?

Answer 1

There are many ways of punctuating phone numbers. Why don't you remove everything but the digits and check the length?

Note that there are several ways of indicating "extension":

+1 212 555 1212 ext.35