Phone Number Validator
Instantly validate phone numbers against the ITU E.164 numbering plan. Validate one number or hundreds at once — paste them one per line. Free, runs in your browser.
✦ NumberOTP
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Frequently Asked Questions
What is the difference between "valid" and "possible"?
"Valid" means the number matches an existing numbering plan pattern for its country — it is structurally correct and could be assigned to a subscriber. "Possible" means the length is plausible for the country but does not guarantee the number is currently assigned or active.
Can I validate multiple numbers at once?
Yes. Paste one number per line in the input box. The tool validates all of them in a single click and shows a summary with valid/invalid counts.
Does validation confirm a number is active or reachable?
No. This tool validates the number's format against the ITU numbering plan. It cannot confirm whether the number is currently active, reachable, or belongs to a real subscriber. For live number verification, you need an HLR lookup or carrier ping.
Why must I include the + country code?
Without a country code, the same string of digits can be a valid number in dozens of different countries. The + prefix and country code are what make a phone number globally unambiguous.
What is the ITU numbering plan?
The International Telecommunication Union (ITU) maintains E.164 — the global standard that assigns country calling codes and defines valid number formats for each country. Our validator uses this database to check if a number's structure matches what is allocated for its country.
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