Validating Phone Number Formats for a Country/Region


How to validate phone number formats for a specific country or region?

Different countries or regions use different phone number formats. To help you to validate phone number formats used in a specific country or region, has designed this online tool. All you need to do is to end a phone number of a specific country/region in the form below, and click the "Validate" button. The validation result will be presented back to you.

Phone #



Validation result by

Specified Phone Number: Valid

"800 335-2247" matches the format of "AAA SSS-SSSS"

Most phone numbers in United States are written in the following formats:

   Prefix: long distance or international
   |   Carrier or area code 
   |   --------------------
   |   |   Subscriber number
   |   |   -----------------
   v   v   v
       AAA SSS-SSSS     - Local format
  +1   AAA SSS-SSSS     - International format

Most telephone numbers in United States have 10 digits and are written in the format of "AAA SSS-SSSS". Here are some examples: 800 335-2247; 305 876-7000.

When dialing locally inside United States, dial the phone number directly as "AAA SSS-SSSS". Long distance prefix is not needed.

When dialing from outside of United States, the international dial-in prefix "+1" is required. So the format becomes "+1 AAA SSS-SSSS".

When dialing from United States to other countries, the international dail-out prefix "+" or "011" required.

To validate phone number formats for other countries or regions, see our Generic Phone Number Format Validator.

To see phone number examples in United States, try our Test Phone Number Generator.


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2023-12-02, 4701🔥, 0💬