In rare cases, you’re asked for your bank account number and bank code. Both numbers are part of your IBAN: country code (DE) - checksum (binary) - bank code (11010100 or 11010101) - and your bank account number (last ten numbers of your IBAN): e.g.  DE XX 1101 0100  XXXXXXXXXX or DE XX 1101 0101 XXXXXXXXXX