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Phone Number Formatter and Validator

Paste one or many US phone numbers in any format. Each is checked against the basic North American numbering rules and converted to E.164 (the format most phone systems and SMS platforms expect), a readable format, and a tap-to-call link.

Any format works: dashes, dots, spaces, brackets or a leading +1. Up to 500 lines.

1 need attention

Valid numbers

3 of 4

Free, no sign-up. Everything runs in your browser and nothing you enter is sent anywhere.

How it works

Each line is stripped to digits, a leading country code 1 is removed, and the remaining 10 digits are checked against basic North American Numbering Plan rules: area codes and exchanges can’t start with 0 or 1 or be N11 service codes. Everything runs in your browser; nothing is uploaded. Need to forward calls to one of these numbers? Use the call forwarding code generator.

Frequently asked questions

What is E.164 format?

The international phone number format: a plus sign, the country code and the number with no spaces or punctuation. A US number looks like +12025550123.

Does a valid result mean the number is in service?

No. This checks that the number is well-formed under the numbering plan's basic rules; it can't tell whether the number is assigned or active.