Jordan IBAN Validator

In short A Jordanian IBAN is exactly 30 characters: JO, two check digits, then 4 letters, then 4 digits, then 18 letters or digits — so the 4 characters after the check digits are the bank code — CBJO in the example — the next 4 are the four-digit branch, 0010, and the remaining 18 are the account, 000000000131000302. Jordan uses four letters of bank code and four digits of branch, then eighteen characters of account, for a thirty-character IBAN — one of the longest in the registry. The checksum is ISO 7064 MOD-97-10: move the first four characters to the end, turn each letter into its position in the alphabet plus nine, and read the result as one long number, which must leave remainder 1 when divided by 97. That catches every single-character mistake and almost every swap of two neighbouring characters, which is what it was designed for and why an IBAN is worth checking before you pay rather than after. What it cannot do is tell you the account exists, is open, or belongs to the person you think — a random string of the right shape passes about once in 97 tries, and no amount of arithmetic reaches into a bank. This page runs entirely in your browser, so the number you type is not sent anywhere.