Regular expression matching E.164 formatted phone numbers

The accepted answer is good, except an E.164 number can have up to 15 digits. The specification also doesn't indicate a minimum, so I wouldn't necessarily count on 10.

It should be ^\+?[1-9]\d{1,14}$

See http://en.wikipedia.org/wiki/E.164

Well, I used the accepted answer but it failed for many cases:

For inputs like:

• Where numbers did not start with "+".
• Where number count was less than 9.

the regex failed.

I finally used

^\+(?:[0-9]?){6,14}[0-9]$

This worked like a charm!

Typescript/Javascript : E.164

This works for me:

   static PHONE_NUMBER = /^\+[1-9]\d{10,14}$/; // E.164

   PHONE_NUMBER.test('+' + countryCode + phoneNumber);

Reference: https://blog.kevinchisholm.com/javascript/javascript-e164-phone-number-validation/

I think until you have a great set of examples, you are best served by a flexible regex. This one will match a + followed by 10-14 digits.

^\+?\d{10,14}$

Broken down, this expression means: ^ Match begining of string. \+? Optionally match a + symbol. \d{10,14} Match between 10 and 14 digits. $ Ensure we are at the end of the string.

If you learn that a digit at a particular index must not be 1 or 0, then you can use the [2-9] at that position, like this:

^\+?\d{6,7}[2-9]\d{3}$

[2-9] means match any digit from 2 through 9 (don't match 0 or 1.)