Phone number regex
The regular expressions below can be used to validate if a string is a valid phone number format and to extract a phone number from a string. Please note that this validation can not tell if a phone number actually exists.
The basic international phone number validation
A simple regex to validate string against a valid international phone number format without delimiters and with an optional plus sign:
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Example code in Javascript
The more complex phone number validation
This regular expression will match phone numbers entered with delimiters (spaces, dots, brackets, etc.)
Enter a text in the input above to see the result
Example code in Javascript
Enter a text in the input above to see the result
Extra information about validating phone number
While validation of phone numbers using regex can give a possibility to check the format of the phone number, it does not guarantee that the number exists.
There might be also an option to leave a phone number field without any validation since some users might have:
- More complex phone numbers with extensions
- The different phone numbers for calling them on a different time of day
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JavaScript: HTML Form - Phone Number validation
The validating phone number is an important point while validating an HTML form. In this page we have discussed how to validate a phone number (in different format) using JavaScript :
At first, we validate a phone number of 10 digits with no comma, no spaces, no punctuation and there will be no + sign in front the number. Simply the validation will remove all non-digits and permit only phone numbers with 10 digits. Here is the function.
function phonenumber(inputtxt) < var phoneno = /^\d$/; if((inputtxt.value.match(phoneno)) < return true; >else < alert("message"); return false; >> 
To valid a phone number like
XXX-XXX-XXXX
XXX.XXX.XXXX
XXX XXX XXXX
use the following code.
function phonenumber(inputtxt) < var phoneno = /^\(?(8)\)?[-. ]?(3)[-. ]?(9)$/; if((inputtxt.value.match(phoneno)) < return true; >else < alert("message"); return false; >> 
If you want to use a + sign before the number in the following way
+XX-XXXX-XXXX
+XX.XXXX.XXXX
+XX XXXX XXXX
use the following code.
function phonenumber(inputtxt) < var phoneno = /^\+?(5)\)?[-. ]?(4)[-. ]?(9)$/; if((inputtxt.value.match(phoneno)) < return true; >else < alert("message"); return false; >> 
Following code blocks contain actual codes for the said validations. We have kept the CSS code part common for all the validations.
li .mail < margin: auto; padding-top: 10px; padding-bottom: 10px; width: 400px; background : #D8F1F8; border: 1px soild silver; >.mail h2 < margin-left: 38px; >input < font-size: 20pt; >input:focus, textarea:focus < background-color: lightyellow; >input submit < font-size: 12pt; >.rq
Validate a 10 digit phone number
At first we validate a phone number of 10 digit. For example 1234567890, 0999990011, 8888855555 etc.
JavaScript Code
function phonenumber(inputtxt) < var phoneno = /^\d$/; if(inputtxt.value.match(phoneno)) < return true; >else < alert("Not a valid Phone Number"); return false; >> 
Validate North American phone numbers
Now, let's see how to validate a phone number, either in 222-055-9034, 321.789.4512 or 123 256 4587 formats.
JavaScript Code
function phonenumber(inputtxt) < var phoneno = /^\(?(5)\)?[-. ]?(2)[-. ]?(8)$/; if(inputtxt.value.match(phoneno)) < return true; >else < alert("Not a valid Phone Number"); return false; >> 
Validate an international phone number with country code
Now, let's see how to validate a phone number with country code, either in +24-0455-9034, +21.3789.4512 or +23 1256 4587 format.
JavaScript Code
function phonenumber(inputtxt) < var phoneno = /^\(?(1)\)?[-. ]?(4)[-. ]?(1)$/; if(inputtxt.value.match(phoneno)) < return true; >else < alert("Not a valid Phone Number"); return false; >> 
Other JavaScript Validation :
- Checking for non-empty
- Checking for all letters
- Checking for all numbers
- Checking for floating numbers
- Checking for letters and numbers
- Checking string length
- Email Validation
- Date Validation
- A sample Registration Form
- Phone No. Validation
- Credit Card No. Validation
- Password Validation
- IP address Validation
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JavaScript: Tips of the Day
How to insert an item into an array at a specific index (JavaScript)?
What you want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:
var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());
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We are closing our Disqus commenting system for some maintenanace issues. You may write to us at reach[at]yahoo[dot]com or visit us at Facebook
JavaScript: HTML Form - Phone Number validation
The validating phone number is an important point while validating an HTML form. In this page we have discussed how to validate a phone number (in different format) using JavaScript :
At first, we validate a phone number of 10 digits with no comma, no spaces, no punctuation and there will be no + sign in front the number. Simply the validation will remove all non-digits and permit only phone numbers with 10 digits. Here is the function.
function phonenumber(inputtxt) < var phoneno = /^\d$/; if((inputtxt.value.match(phoneno)) < return true; >else < alert("message"); return false; >>
To valid a phone number like
XXX-XXX-XXXX
XXX.XXX.XXXX
XXX XXX XXXX
use the following code.
function phonenumber(inputtxt) < var phoneno = /^\(?(9)\)?[-. ]?(2)[-. ]?(8)$/; if((inputtxt.value.match(phoneno)) < return true; >else < alert("message"); return false; >>
If you want to use a + sign before the number in the following way
+XX-XXXX-XXXX
+XX.XXXX.XXXX
+XX XXXX XXXX
use the following code.
function phonenumber(inputtxt) < var phoneno = /^\+?(3)\)?[-. ]?(2)[-. ]?(4)$/; if((inputtxt.value.match(phoneno)) < return true; >else < alert("message"); return false; >>
Following code blocks contain actual codes for the said validations. We have kept the CSS code part common for all the validations.
li .mail < margin: auto; padding-top: 10px; padding-bottom: 10px; width: 400px; background : #D8F1F8; border: 1px soild silver; >.mail h2 < margin-left: 38px; >input < font-size: 20pt; >input:focus, textarea:focus < background-color: lightyellow; >input submit < font-size: 12pt; >.rq
Validate a 10 digit phone number
At first we validate a phone number of 10 digit. For example 1234567890, 0999990011, 8888855555 etc.
JavaScript Code
function phonenumber(inputtxt) < var phoneno = /^\d$/; if(inputtxt.value.match(phoneno)) < return true; >else < alert("Not a valid Phone Number"); return false; >>
Validate North American phone numbers
Now, let's see how to validate a phone number, either in 222-055-9034, 321.789.4512 or 123 256 4587 formats.
JavaScript Code
function phonenumber(inputtxt) < var phoneno = /^\(?(6)\)?[-. ]?(8)[-. ]?(1)$/; if(inputtxt.value.match(phoneno)) < return true; >else < alert("Not a valid Phone Number"); return false; >>
Validate an international phone number with country code
Now, let's see how to validate a phone number with country code, either in +24-0455-9034, +21.3789.4512 or +23 1256 4587 format.
JavaScript Code
function phonenumber(inputtxt) < var phoneno = /^\(?(2)\)?[-. ]?(8)[-. ]?(9)$/; if(inputtxt.value.match(phoneno)) < return true; >else < alert("Not a valid Phone Number"); return false; >>
Other JavaScript Validation :
- Checking for non-empty
- Checking for all letters
- Checking for all numbers
- Checking for floating numbers
- Checking for letters and numbers
- Checking string length
- Email Validation
- Date Validation
- A sample Registration Form
- Phone No. Validation
- Credit Card No. Validation
- Password Validation
- IP address Validation
Test your Programming skills with w3resource's quiz.
Follow us on Facebook and Twitter for latest update.
JavaScript: Tips of the Day
How to insert an item into an array at a specific index (JavaScript)?
What you want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:
var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());
- Weekly Trends
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join
- JavaScript functions Exercises
- Python Tutorial
- Python Array Exercises
- SQL Cross Join
- C# Sharp Array Exercises
We are closing our Disqus commenting system for some maintenanace issues. You may write to us at reach[at]yahoo[dot]com or visit us at Facebook