Free phone number tools

Small tools for the fiddly parts of phone numbers. They are free, need no account, and work in your browser: what you type is not sent anywhere.

VoIP number checkerSee whether a US number is mobile, landline or VoIP, and which carrier it is with.
Per-code vs rental calculatorWork out whether paying per code or renting a number by the day costs less for you.
US phone number formatterTurn any US number into the exact format a form, an API or a person expects.
Verification code extractorPaste a text message, get just the code, cleaned up and ready to paste.