regular expression phone number

Question

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A comprehensive regex for phone number validation

Can somebody give me the regex for phone number. It can be entered in the format of XXX-XXX-XXXX or (XXX)-XXX-XXXX or XX-XXX-XXXX or XXXXXXXXX

Heres what I have:

/\d{2,3}-\d{3}-\d{4}$/

Answer 1

Brute force/easily maintained/easily read/I think is what you have.

(\d\d\d\-\d\d\d\-\d\d\d\d)|(\(\d\d\d\)\-\d\d\d\-\d\d\d\d)|(\d\d\-\d\d\d\-\d\d\d\d)|(\d\d\d\d\d\d\d\d\d)

Or if you prefer:

(\d{3}\-\d{3}\-\d{4})|(\(\d{3})\-\d{3}\-\d{4})|(\d{2}-\d{3}\-\d{4})|(\d{9})

Answer 2

((\d{2,3}|\(\d{3}\))-\d{3}-\d{4}|\d{9})

Answer 3

Mostly you care about the digits:

    /^([()-]*\d)[()-]*){9,10}$/.test(string);

    or even

    /^(\D*\d\D*){9,10}/.test(string);