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IBAN Validator
Validate IBAN numbers against the SWIFT IBAN Registry: country code, length and BBAN structure for all 89 registry countries, plus the ISO 7064 MOD 97-10 check digits.
Follows ISO 13616-12020·verified Oct 2026· double-checked Oct 2026— SWIFT IBAN Registry v101 lengths and BBAN formats (89 countries); check digits 02–98; national check digits not checked
Use test data only. All calculations run locally in your browser — PayProbe never sees, transmits, or stores your PAN, CVV, keys, PINs, or cryptographic inputs. How we handle data →
Example IBANs
| Country | IBAN | |
|---|---|---|
| United Kingdom | GB33BUKB20201555555555 | |
| Germany | DE75512108001245126199 | |
| France | FR2531682128768051490609537 | |
| Netherlands | NL02ABNA0123456789 | |
| Switzerland | CH5604835012345678009 | |
| Poland | PL61109010140000071219812874 |
</> Code Implementation
# IBAN Validator — MOD-97 check digit verification
# No external dependencies required
def iban_validate(iban: str) -> dict:
iban = iban.replace(" ", "").upper()
if len(iban) < 5:
return {"valid": False, "error": "Too short"}
country = iban[:2]
rearranged = iban[4:] + iban[:4]
numeric = "".join(
str(ord(c) - ord("A") + 10) if c.isalpha() else c
for c in rearranged
)
remainder = int(numeric) % 97
return {
"valid": remainder == 1,
"country": country,
"check_digits": iban[2:4],
"bban": iban[4:],
"remainder": remainder,
}
# Example
result = iban_validate("GB82 WEST 1234 5698 7654 32")
print(f"Valid : {result['valid']}")
print(f"Country : {result['country']}")
print(f"BBAN : {result['bban']}")
# Valid : True
# Country : GB
# BBAN : WEST12345698765432
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