C# Regex to validate phone number

Question

It would be great if someone could help me with a Regex for phone numbers. Following are the conditions:

If + is present, then it should be the first character
Allowed characters are numbers ( ) space - and .
Minimum of 6 numbers and max 12
( , ) and space can come anywhere in the string
- shouldn't be the first and last character and shouldn't appear immediately after +, if + is present.

Here are some valid numbers:

+93483227359
+1 703 335 65123
34565464
001 (703) 332-6261
+1703.338.6512
+934-83227359
(111)123-4567
111-123-4567

Thanks in advance

Just to check, are you sure you want "+)-)-)333(((,111" to be a valid phone number? — Jon Skeet, Jan 18 '12 at 11:04
@JonSkeet well, I'm pretty sure `tel:+)-)-)333(((,111` is a valid tel URI, so one could argue that if it's good enough for RFC 3966 then... :) I'd be more worried that the min and max number of digits is Internationally valid. — Jon Hanna, Jan 18 '12 at 11:09
Indeed, my own is 12digits after the +, so if given in the form local to a given country it would be at least 13digits long. — Jon Hanna, Jan 18 '12 at 11:21

score 26 · Accepted Answer · answered Jan 18 '12 at 11:07

26

Try with:

^\+?(\d[\d-. ]+)?(\([\d-. ]+\))?[\d-. ]+\d$

However it does not handle number counting

answered Jan 18 '12 at 11:07

hsz

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@PabitraDash That's what I wrote. – hsz Jun 12 '15 at 09:38

score 4 · Answer 2 · answered Aug 13 '13 at 01:28

4

Not exactly the answer to your question, but for those who need to work with phone numbers, there is a .NET port of Google's libphonenumber: libphonenumber-csharp.

answered Aug 13 '13 at 01:28

Dmitry

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C# Regex to validate phone number

2 Answers2

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