Phone Number Validator

Check whether a phone number matches the structural E.164 format.

This tool runs entirely in your browser. Your files are never uploaded to a server.

Value to validate

Valid: The value matches E.164 structural format.

Digit count after +: 11
This checks structure only — it does not confirm the number is assigned, active or reachable.

+14155552671

Clear the entered value before starting another check. Validation runs locally and does not check against any external registry, server, or account.

What this tool does

Checks whether a phone number matches the structural shape of the E.164 international format: a plus sign, a country code, and the national number.

How to use it

Enter a number with an optional leading +. Spaces, dots, hyphens and parentheses are removed before checking; the remaining characters must be a + followed by 8 to 15 digits, the first of which is not 0.

Example

Entering +1 415-555-2671 returns valid with 10 digits after the +, while the same number without a leading + is rejected because E.164 requires it.

Validation

The cleaned value must match a + followed by 8 to 15 digits with no leading 0 in the national significant number; punctuation other than spaces, dots, hyphens and parentheses causes rejection.

How to interpret the result

A valid result confirms the number is shaped like a real E.164 number — it does not confirm the number is currently assigned, active, reachable, or capable of receiving calls or texts.

Limitations

This checker does not use a national numbering-plan database, so it cannot confirm that a given country code and length combination is actually issued by that country's regulator; use the SMS Link Generator or WhatsApp Link Generator if you need to build a message link from a validated number.

Privacy

All processing uses local browser APIs and this tool does not upload the values you enter.

Frequently Asked Questions

What does Phone Number Validator do?: Checks whether a phone number matches the structural shape of the E.164 international format: a plus sign, a country code, and the national number.
How does it handle invalid input?: The cleaned value must match a + followed by 8 to 15 digits with no leading 0 in the national significant number; punctuation other than spaces, dots, hyphens and parentheses causes rejection.
Is entered data uploaded?: All processing uses local browser APIs and this tool does not upload the values you enter.

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