What is E.164 format?

E.164 is the international standard for phone numbers: a plus sign, the country code, then the number with no spaces or punctuation, for example +14155550132. CRMs, dialers, and messaging APIs expect this format.

Does validation prove the number is in service?

No. Validation confirms the number is structurally valid for its country's numbering plan. It cannot tell whether the line is active or who answers. Line Intelligence places a real call and reports whether a human, voicemail, or dead line picked up.

Is the number sent to a server?

No. This tool runs entirely in your browser using the libphonenumber rules. The number never leaves the page.

Validate any phone number

Check validity, formatting, country, and line type instantly. Runs entirely in your browser.

Need to know if it answers? Line Intelligence calls it for real.

What you get

Every standard format

Get the number back in E.164, international, and national formats, ready for your CRM or dialer.

Country and line type

The country is detected from the number itself, along with mobile versus fixed line where the numbering plan reveals it.

Nothing leaves your browser

Validation runs entirely client side using Google's libphonenumber rules. Numbers are never sent to a server.

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Validate any phone number

Every standard format

Country and line type

Nothing leaves your browser

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