Validate phone number with JavaScript

Question

I found this code in some website, and it works perfectly. It validates that the phone number is in one of these formats:
(123) 456-7890 or 123-

Answer 1

What I would do is ignore the format and validate the numeric content:

var originalPhoneNumber = "415-555-1212";

function isValid(p) {
  var phoneRe = /^[2-9]\d{2}[2-9]\d{2}\d{4}$/;
  var digits = p.replace(/\D/g, "");
  return phoneRe.test(digits);
}

Answer 2

I have to agree that validating phone numbers is a difficult task. As for this specific problem i would change the regex from

/^(()?\d{3}())?(-|\s)?\d{3}(-|\s)\d{4}$/

to

/^(()?\d{3}())?(-|\s)?\d{3}(-|\s)?\d{4}$/

as the only one more element that becomes unnecessary is the last dash/space.

Answer 3

\\(?\d{3}\\)?([\-\s\.])?\d{3}\1?\d{4}

This will validate any phone number of variable format:

\\(?\d{3}\\)? finds 3 digits enclosed by parenthesis or not.

([\-\s\.])? finds any of these separator characters or not

\d{3} finds 3 digits

\1 uses the first matched separator - this ensures that the separators are the same. So (000) 999-5555 will not validate here because there is a space and dash separator, so just remove the "\1" and replace with the separator sub-pattern (doing so will also validate non standard formats). You should however be format hinting for user input anyway.

\d{4} finds 4 digits

Validates:

• (000) 999 5555
• (000)-999-5555
• (000).999.5555
• (000) 999-5555
• (000)9995555
• 000 999 5555
• 000-999-5555
• 000.999.5555
• 0009995555

BTW this is for JavaScript hence to double escapes.

Answer 4

realy simple

"9001234567".match(/^\d{10}$/g)

Answer 5

Try this one - it includes validation for international formats too.

/^[+]?(1\-|1\s|1|\d{3}\-|\d{3}\s|)?((\(\d{3}\))|\d{3})(\-|\s)?(\d{3})(\-|\s)?(\d{4})$/g

This regex validates the following format:

• (541) 754-3010 Domestic
• +1-541-754-3010 International
• 1-541-754-3010 Dialed in the US
• 001-541-754-3010 Dialed from Germany
• 191 541 754 3010 Dialed from France

Answer 6

Simple Regular expression: /\b\d{3}[-.]?\d{3}[-.]?\d{4}\b/g

Check out the format, hope it works :
444-555-1234
f:246.555.8888
m:1235554567