AT · ISO 13616
Austria IBAN — format, length, example & validator
IBANs issued in Austria are 20 characters long and begin with the country code AT. Validate a Austria IBAN below, or read on for the full structure, an example, and how the MOD 97 check digits work.
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How a Austria IBAN is structured
A Austria IBAN is read left to right: a 2-letter ISO 3166 country code (AT), 2 MOD 97 check digits, then a 16-character BBAN. The BBAN is split into 2 fields: 5 digits, 11 digits.
Austria IBAN example
A sample Austria IBAN that passes all checks (format, length, MOD 97):
How Austria IBAN check digits work
The two digits at positions 3–4 are a MOD 97-10 checksum computed from the country code and the BBAN. To verify it, the IBAN is rearranged (BBAN first, country code and check digits last), letters are converted to numbers (A = 10, B = 11, …), and the whole integer is taken mod 97. A valid IBAN has a remainder of 1. This catches any single-digit typo and most transposition errors — which is why a one-character mistake is enough to make a Austria IBAN fail validation instantly.
Austria IBAN FAQ
- How long is a Austria IBAN?
- A Austria IBAN is always 20 characters long: 2 letters for the country code (AT), 2 check digits, and a 16-character BBAN. Any Austria IBAN that is shorter or longer than 20 characters is invalid.
- What country code does a Austria IBAN start with?
- A Austria IBAN starts with the ISO 3166 country code AT. The first two characters are always AT, followed by two MOD 97 check digits, then the country-specific BBAN.
- How do I validate a Austria IBAN?
- Paste the IBAN into the validator on this page — it checks the character set, the 20-character length, and the MOD 97 check digits, all in your browser. You can also open the full IBAN validator with a Austria example pre-filled.
- Does a valid Austria IBAN mean the account exists?
- No. Validation only confirms the IBAN is structurally well-formed and the check digits are correct per ISO 13616. It does not verify the account exists, is open, or belongs to anyone. Always confirm with the recipient or their bank before sending money.
⚠️ Validation only checks structure and check digits against ISO 13616. A valid Austria IBAN does not guarantee the account exists or is open. Always confirm with the recipient or their bank before initiating a transfer.