Regular expression to match standard 10 digit phone number

There are many variations possible for this problem. Here is a regular expression similar to an answer I previously placed on SO.

^\s*(?:\+?(\d{1,3}))?[-. (]*(\d{3})[-. )]*(\d{3})[-. ]*(\d{4})(?: *x(\d+))?\s*$

It would match the following examples and much more:

1 800 555 1234
+1 800 555-1234
+86 800 555 1234
1 (800) 555-1234
(800) 555-1234
800 555 1234x5678
8005551234 x5678
1    800    555-1234

Regardless of the way the phone number is entered, the capture groups can be used to breakdown the phone number so you can process it in your code.

  • Group1: Country Code (ex: 1 or 86)
  • Group2: Area Code (ex: 800)
  • Group3: Exchange (ex: 555)
  • Group4: Subscriber Number (ex: 1234)
  • Group5: Extension (ex: 5678)

Here is a breakdown of the expression if you’re interested:

^\s*                #Line start, match any whitespaces at the beginning if any.
(?:\+?(\d{1,3}))?   #GROUP 1: The country code. Optional.
[-. (]*             #Allow certain non numeric characters that may appear between the Country Code and the Area Code.
(\d{3})             #GROUP 2: The Area Code. Required.
[-. )]*             #Allow certain non numeric characters that may appear between the Area Code and the Exchange number.
(\d{3})             #GROUP 3: The Exchange number. Required.
[-. ]*              #Allow certain non numeric characters that may appear between the Exchange number and the Subscriber number.
(\d{4})             #Group 4: The Subscriber Number. Required.
(?: *x(\d+))?       #Group 5: The Extension number. Optional.
\s*$                #Match any ending whitespaces if any and the end of string.

To make the Area Code optional, just add a question mark after the (\d{3}) for the area code.

US and Canada zip code validation RegEx

I had to spent more time than I wished I would spend last weekend trying to find a RegEx that would validate US and Canadian postal codes for me.   So here for the record, are the regular expression strings that I was looking for

^[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}$
Matches Canadian PostalCode formats with or without spaces (e.g., “T2X 1V4” or “T2X1V4”)

Matches all US format zip code formats (e.g., “94105-0011” or “94105”)

(^\d{5}(-\d{4})?$)|(^[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}$)
Matches US or Canadian zip codes in above formats.

Regex Quick Cheat Sheet

Quick cheat sheet

  • Start the expression: /^
  • If you want to require a space, use: [\s] or \s
  • If you want to require parenthesis, use: [(] and [)] . Using \( and \) is ugly and can make things confusing.
  • If you want anything to be optional, put a ? after it
  • If you want a hyphen, just type - or [-] . If you do not put it first or last in a series of other characters, though, you may need to escape it: \-
  • If you want to accept different choices in a slot, put brackets around the options: [-.\s] will require a hyphen, period, or space. A question mark after the last bracket will make all of those optional for that slot.
  • \d{3} : Requires a 3-digit number: 000-999. Shorthand for [0-9][0-9][0-9].
  • [2-9] : Requires a digit 2-9 for that slot.
  • (\+|1\s)? : Accept a “plus” or a 1 and a space (pipe character, |, is “or”), and make it optional. The “plus” sign must be escaped.
  • If you want specific numbers to match a slot, enter them: [246] will require a 2, 4, or 6. [77|78]will require 77 or 78.
  • $/ : End the expression