Regular expression 10 digit phone number capture

Question

I am trying to match 10 digit phone numbers (that start with 2-9) that are on word boundaries (i.e. there is white space around them.) Sometimes the above phone numbers are prefixed with an +1 or 1

I would like it to still match the 10 digit phone number that follows but discard the +1 or 1 There can be multiple phone numbers in the text. Here is my regexp

\b(([+]?[1-9]{1})?([2-9][0-9]{9}))\b

https://regex101.com/r/yS1vM4/1

Shows matches. However it doesn't match for the first row of numbers and it should NOT match on the 2nd and last row:

abcd +12125551212 xyz should match starting at 212 
abcd +2125551212 xyz should NOT match (+ sign only)
abcd 2125551212 xyz  match OK!
abcd+12125551212 xyz should NOT match (no white space at start)
abcd 12125551212 xyz should match starting at 212

Thank you

score 1 · Answer 1 · answered Mar 04 '15 at 15:05

1

You can probably use this regex for your examples:

/(?:(?<= [+][1-9])|(?<= [1-9])|(?<= ))([2-9][0-9]{9})\b/gi

RegEx Demo

Or else this this regex and use matched group #1:

/\s([+]?[1-9])?([2-9][0-9]{9})\b/gi

RegEx Demo 2

answered Mar 04 '15 at 15:05

anubhava

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I like the first one, works in the cases I provided. But will not work for a number that is at start of line . I added a \b in front hoping it would work. Any improvement that can be done? -thanks – user603749 Mar 04 '15 at 15:39
If you also want to match numbers at start then why did you add **(no white space at start)**? – anubhava Mar 04 '15 at 15:48
sorry I wasn't clear. I meant no white space at start of number. – user603749 Mar 04 '15 at 16:04
Ok, I added an alternate (?<=\b) and it works -thanks – user603749 Mar 04 '15 at 16:24

score 0 · Accepted Answer · edited Sep 30 '15 at 13:46

0

This is a better one.

(?<!\S)(?:\+?1)?([2-9]\d{9})(?!\S)

Formatted (this):

 (?<! \S )            # Look behind, whitespace or ^ 
 (?: \+? 1 )?         # Optional +1
 ( [2-9] \d{9} )      # (1), ten digit phone
 (?! \S )             # Look ahead, whitespace or $

edited Sep 30 '15 at 13:46

Flak DiNenno

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answered Mar 05 '15 at 00:40

Regular expression 10 digit phone number capture

2 Answers2