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IBAN by country

Austria IBAN

20 characters: the country code, two check digits, then the BBAN cut as below.

Anatomy of the official example

AT611904300234573201

  • Country code
  • Check digits
  • Bank code
  • Account number

The example comes from the ISO 13616 registry; it belongs to nobody. Positions count from the first character of the IBAN.

The bank code of this official example is not allocated in Oesterreichische Nationalbank SEPA-Zahlungsverkehrs-Verzeichnis: the API says so as it is, which is the expected behaviour on a demonstration IBAN.

The facts about the Austria IBAN
ISO codeAT
Length20 characters
Check digitspositions 3 to 4, ISO 7064 mod 97-10
Bank codepositions 5 to 9 · 5!n
Account numberpositions 10 to 20 · 11!n
Official exampleAT61 1904 3002 3457 3201
SEPA areamember · SCT, SDD, SCT Inst
Verification of Payeemandatory for the country's providers
Bank-code registerOesterreichische Nationalbank SEPA-Zahlungsverkehrs-Verzeichnis

SWIFT notation: n = digits, a = upper-case letters, c = alphanumeric characters; the exclamation mark fixes the exact length.

What the API checks on a Austria IBAN

  • The length, the charset of every field and the mod-97 check digits.
  • The bank code against Oesterreichische Nationalbank SEPA-Zahlungsverkehrs-Verzeichnis, refreshed monthly: institution, matching BIC, status.
  • The country's SEPA reachability and the open schemes (SCT, SDD, SCT Inst).
  • The Verification of Payee duty that does, or does not, bind the country's providers.

What the API answers for this code

The block below is the route's own answer, produced by the same code that serves api.ibanforge.com, on the register as of the date shown. Nothing is edited.

{
  "valid": true,
  "country": {
    "code": "AT",
    "name": "Austria"
  },
  "bic": null,
  "bank_code_check": {
    "value": "19043",
    "status": "not_in_register",
    "reason": "not_allocated",
    "match": null,
    "register": "Oesterreichische Nationalbank SEPA-Zahlungsverkehrs-Verzeichnis",
    "authoritative": true,
    "as_of": "2026-09"
  },
  "sepa": {
    "member": true,
    "schemes": [
      "SCT",
      "SDD",
      "SCT_INST"
    ],
    "vop_required": true,
    "vop_participant": null,
    "basis": "country_default"
  },
  "issuer": null,
  "risk_indicators": {
    "country_risk": "standard",
    "sepa_reachable": true,
    "vop_coverage": true,
    "test_bic": false
  }
}
Test a Austria IBAN for freeAudit a whole creditor fileThe POST /v1/iban/validate routeThe country's bank codes, one per pageAll countries

Source: ISO 13616 registry for the length, layout and example; API answer captured on 2026-09-23.