Free United States phone number validator

Check any United States number (+1): valid or not, mobile or landline, original carrier, and the correct international format.

How United States numbers are written

Country code +1. Locally: (201) 555-0123. Internationally: +1 201-555-0123.

Validate United States numbers in bulk or by API

Clean a CSV of up to 50,000 numbers, or call the API from your app or AI agent with "default_country": "US". 250 free lookups.

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