Phone number tools
Four small utilities we use ourselves when a sign-up misbehaves. They run in your browser; nothing is sent anywhere.
How do I format a phone number for verification?
Write it in E.164: a plus sign, the country calling code and the national number with no spaces, leading zeros or punctuation, e.g. +447911123456. The formatter below does it for any country and flags numbers with the wrong length.
All articles
- Phone number formatterPaste any phone number, pick the country and get it in E.164, international and national formats, with the length checked against the country's numbering plan.
- Country calling codesSearchable list of country calling codes (+1, +44, +91…) with the mobile number format of each country and a link to its temporary numbers.
- Phone number validatorCheck whether a phone number has a valid country code and the right number of digits for that country before you use it for verification.
- Verification code troubleshooterAnswer a few questions about your failed verification and get the likely cause and the fix: wrong format, VoIP rejection, rate limit, app-side block or delay.
Get your verification code now
Top up from $5, pick an app and a country, and read the SMS in your browser. Charged only when the code arrives.
Get a numberWhatsApp · United States$0.42
+1 (415) 555-0132
482 913