Check whether a United States number is valid, detect its line type, and convert it to E.164, international, or national format — instantly and free. Powered by Google's libphonenumber.
| Country | United States (US) |
| Country calling code | +1 |
| Example number (international) | +1 201 555 0123 |
| National format | (201) 555-0123 |
| E.164 format | +12015550123 |
| RFC 3966 (tel: URI) | tel:+12015550123 |
| Example line type | fixed line or mobile |
To dial a United States number from abroad, start with the country code +1 followed by the national subscriber number. In E.164 — the format every SMS gateway, CRM, and payment provider expects — the same number is stored as +12015550123: a leading +, the country code, and the national number with no spaces or separators.
The interactive tool above runs entirely in your browser. For server-side validation at scale — sign-up forms, lead cleaning, SMS routing — call the API. One GET request, no SDK, works in any language.
# Validate a United States number via the API curl "https://phone-validation-and-formatting.p.rapidapi.com/v1/validate?number=%2B12015550123" \ -H "X-RapidAPI-Key: YOUR_KEY" \ -H "X-RapidAPI-Host: phone-validation-and-formatting.p.rapidapi.com"
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The country calling code for United States is +1. A full number in international (E.164) form looks like +12015550123.
A typical United States fixed line or mobile number is written +1 201 555 0123 internationally, (201) 555-0123 nationally, or +12015550123 in E.164 format.
Send one GET request to the Phone Validation API with the number and country code "US". The response tells you whether it is valid, the line type, and every standard format. A free tier is available.
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