How to validate phone number with a plus (+) sign and "(0)" by regex?

Question

I see a lot of solutions to validate a phone number by Regex... But I want some characters in my phone number such as +31(0)12 for example.

If you have string with the value +31(0)12-1234567. This is a correct notation of a phone number. How could you validate by using Regex?

I have tried this:

Regex phonePattern = new Regex(@"\+\d{3}?(\0)\d*\-\d*");

What do I wrong?

Other examples are: +31(0)6-12345678 or +31(0)123-123456

(0) is important too in your answer... – user1531040 Aug 16 '17 at 18:47 — user1531040, Aug 16 '17 at 18:47

Koby Douek · Accepted Answer · 2017-08-16T10:18:38.500

8

I had this issue too and found no duplicate here on SO to Regex a number with a plus + sign being a phone number.

Finally I formatted this Regex myself:

Regex phonePattern = new Regex(@"\s*(?:\+?(\d{1,3}))?([-. (]*(\d{3})[-. )]*)?((\d{3})[-. ]*(\d{2,4})(?:[-.x ]*(\d+))?)\s*");

This will match:

+nnnnnnnnnn
+nnn-nnn-nn
nnnnnnnnnnn
nnnn-nnnn-n
(nnn)nnnnnn
+(nnn)nnnnn

edited Aug 16 '17 at 10:18

answered Aug 16 '17 at 10:12

Koby Douek

And specific a test if this is in the content: (0) ? – user1531040 Aug 16 '17 at 11:10
will this work if there's a space? – Nigel Fds Feb 13 '18 at 01:30

score 0 · Answer 2 · answered Aug 16 '17 at 10:13

0

should it be something like this: +\d{1,3}(0)\d*-\d*

your example isn't escaping the brackets around the zero and country codes can be 1 to 3 digits long.

answered Aug 16 '17 at 10:13

Craig Foster

1

@"+\d{1,3}(0)\d*-\d*" this gives an error message. I think you have to start with a \. – user1531040 Aug 16 '17 at 11:12

2 Answers2