Regular expression to validate US phone number with Custom validations

Question

I want to create regular expression to validate US phone numbers, which will validate below need:

333 (till 1 to 3 digits)
333-3 (3 digits + 1 hyphen + 1 to 3 digit)
333-333-3333 (3 digits + 1 hyphen + 3 digit + 1 hyphen + 1 to 4 digits)
333-333-3333 3333 (3 digits + 1 hyphen + 3 digit + 1 hyphen + 4 digits + 1 space + 1 to 4 digits)
33333333333333 (any number of digit between 1 to 14)

I started regular expression from:

^\d{0-3}-\d{3}-\d{4}\s\d{4}$

Here I only want to validate above conditions, No special characters are allowed. I don't want to be generic. Only need to follow above conditions. Thanks in advance.

possible duplicate of [A comprehensive regex for phone number validation](http://stackoverflow.com/questions/123559/a-comprehensive-regex-for-phone-number-validation) — Michel, Jun 18 '15 at 08:37

score 0 · Answer 1 · answered Jun 18 '15 at 09:59

You already described it, just translate that into a rexgex:

^\d{1,14}$       |         # (any number of digit between 1 to 14)
^\d{3}-\d{1,3}$  |         # (3 digits + 1 hyphen + 1 to 3 digit)
^\d{3}-\d{1,3}-\d{1,4}$  | # (3 digits + 1 hyphen + 1 to 3 digit + 1 hyphen + 1 to 4 digits)
^\d{3}-\d{1,3}-\d{1,4}\s\d{1,4}$ # (3 digits + 1 hyphen + 1 to 3 digit + 1 hyphen + 1 to 4 digits + 1 space + 1 to 4 digits)

Demo

score 0 · Accepted Answer · answered Jun 18 '15 at 11:45

0

Thanks for the Help.

I have created below regex for above requirement, and it works for me.

^\d{0,3}$|^\d{3}-\d{1,3}$|^\d{3}-\d{3}-\d{1,4}$|^\d{3}-\d{3}-\d{4}\s{1}\d{1,4}$|^\d{1,14}$

answered Jun 18 '15 at 11:45

Rohit Sonaje

522
4
14

with your regex, if you put nothing (a blank string) it will be accepted... https://regex101.com/r/zF7zL5/1 – pchmn Jun 18 '15 at 12:00
Yes, here I need value should be blank or valid value. So It is fulfilling my requirement. – Rohit Sonaje Jun 18 '15 at 12:41

Regular expression to validate US phone number with Custom validations

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