Kazakhstan IBAN validator
How the IBAN format works
- Format
- KZ + 2 check digits + 3-digit bank code + 13-char account number (20 chars)
- Example
- KZ86125KZT5004100100
Things to watch for
- 20 characters total
- Checks structure and checksum only, not that the account exists
^KZ[0-9]{2}[0-9]{3}[0-9A-Z]{13}$A Kazakhstan IBAN runs 20 characters total, tying it with a handful of other formats as one of the shortest in this set: “KZ”, two check digits, a 3-digit bank code, and a 13-character account-number block. What makes the account block distinctive is that it frequently opens with a 3-letter currency code — most often KZT for tenge — immediately followed by the remaining account digits, so the currency the account holds is legible directly from the IBAN rather than only from separate paperwork. Anyone sending a transfer to Kazakhstan, paying a local supplier, or entering an IBAN into a SEPA-style form needs the 3-digit bank code and the full 13-character account block correct, currency letters included.
How this validator works
Validation checks the “KZ” prefix, confirms the bank-code block is exactly 3 digits and the account block is exactly 13 alphanumeric characters, then runs the mod-97 checksum (ISO 7064) used to generate valid Kazakhstani IBANs — entirely client-side, nothing leaves your browser, no signup needed.
What a pass doesn’t tell you
A pass confirms the 20 characters are correctly formed and internally consistent — not that the account is real, open, or belongs to the person you expect. This tool performs no bank-name lookup and never contacts the National Bank of Kazakhstan or any commercial bank. If a Kazakhstani IBAN fails, check the currency-code letters at the start of the account block first, since digits and letters sit right next to each other there and are easy to transpose.
Scope: Kazakhstan IBAN structure and mod-97 checksum validation only — not payment processing or confirmation an account is active. Use this to catch a typo before a transfer fails; your bank confirms the account itself.
Content last reviewed 2026-07-09.
IBAN FAQ
How many characters does a Kazakhstan IBAN have?
20 — one of the shorter IBAN formats covered here: 'KZ', two check digits, a 3-digit bank code, and a 13-character account block, for example KZ86125KZT5004100100.
Why does the account block often start with letters like KZT?
Kazakhstani IBANs commonly embed a 3-letter currency code — KZT for tenge — at the start of the 13-character account block, before the rest of the account digits. It's not decorative: it identifies which currency the account is denominated in, right inside the IBAN itself.
Does this tool confirm the account is open at a Kazakhstani bank?
No. It checks structure and the mod-97 checksum only, entirely in your browser. Confirming an account is active or belongs to a specific holder requires the bank or the National Bank of Kazakhstan.