Validation

International Phone (E.164)

Validate phone numbers in ITU-T E.164 international format: a + sign followed by 2–15 digits, first digit non-zero.

Try it in RegexPro →

Available in

JSSupported

JavaScript / ECMAScript

Browser-native RegExp. Default if you don't pick.

PYSupported

Python (re)

CPython stdlib `re`. Unicode-aware `\w` and `\d` by default.

GOSupported

Go (RE2)

Linear-time matching. No backreferences or lookarounds.

Pattern

regexengine-agnostic
^\+[1-9]\d{1,14}$

Raw source: ^\+[1-9]\d{1,14}$

How it works

^ anchors the start. \+ matches the required leading plus sign. [1-9] ensures the country code starts with a non-zero digit. \d{1,14} allows 1 to 14 additional digits for a total of 2–15 digits after the +, per E.164 spec. $ anchors the end.

Examples

Input

+14155552671

Matches

  • +14155552671

Input

+442071838750

Matches

  • +442071838750

Input

14155552671

No match

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Common use cases

  • •SMS / WhatsApp API integration (Twilio, Vonage)
  • •International contact form validation
  • •Phone number normalization pipelines
  • •CRM data quality enforcement

Related patterns

International Phone Number (Loose)

Validation

Match international phone numbers in a variety of loose formats including country codes, area codes, and separators.

IBAN (International Bank Account Number)

Validation

Validate IBAN bank account identifiers: 2-letter country code, 2 check digits, 11–30 alphanumerics.

US Phone Number

Validation

Match US phone numbers in common formats: (555) 867-5309, 555-867-5309, 5558675309.

Canadian Postal Code

Validation

Match Canadian postal codes in the A1A 1A1 or A1A1A1 format with valid first-letter prefixes.

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