See at once whether a number has the right format and which rule fails. Everything is computed in your browser and the number never leaves this computer.
Type the 11-digit number. Spaces and dashes are ignored.
This tool only checks the format of the number (length and check digits). It cannot tell you whether the number belongs to a real person. Only the official identity verification service knows that.
Type the IBAN with or without spaces. Turkish IBANs start with TR and are 26 characters long.