Phone Number Regex Validator
Validate and format international and national phone numbers with country-aware regex patterns. Support E.164 standard format.
Phone Validator
Regular Expression
Sample Numbers
138123456781598765432118611112222123456789011381234567What is Phone Number Regex Validator?
Phone Number Regex Validator provides country-specific and international regular expression patterns for validating and normalizing telephone numbers. Phone number formatting varies wildly globally US numbers use parentheses area code format UK landlines use zero two zero spaced format German numbers have variable-length area codes Indian mobile numbers start with plus ninety one followed by ten digits and E.164 international standard mandates plus countrycode with no spaces or dashes. Using a one-size-fits-all regex for phone validation leads to both false positives accepting clearly fake numbers and false negatives rejecting valid numbers from specific countries. This validator includes eighty plus country-specific patterns plus international E.164 patterns detects country by plus countrycode prefix tests numbers against patterns from libphonenumber metadata strips common formatting characters spaces dashes parentheses dots before validation explains the structure of each regex pattern component by component and provides normalized output in canonical E.164 format plus one one two three four five six seven eight nine zero international human-readable and national format. Copy patterns escaped for your language of choice.
When to Use Phone Number Regex Validator
Use when validating phone number form fields, normalizing contact lists to E.164 for SMS sending, validating CRM import data, checking phone regex in signup flows, or processing bulk user data.
How to Use Phone Number Regex Validator
Select country patterns or international E.164 mode. Enter phone numbers with any common formatting. View pass or fail status, pattern explanation, and normalized output in 3 standard formats. Copy patterns pre-escaped for JS Python etc.
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