Support Guide
Compare IBAN lengths, example structures, and country-specific differences across major IBAN markets.
You do not need to leave this guide to run a structural check. Use the same validator here, then continue reading if you need more context.
Each country defines its own BBAN structure. Some use bank codes and branch codes, while others combine bank and account information in different positions.
As a result, Germany, France, Spain, the Netherlands, and Lithuania all have different valid lengths and internal layouts.
The most useful fields to compare are total length, whether letters appear in the BBAN, and whether the structure includes branch identifiers or domestic control digits.
This matters when building forms, data imports, or onboarding checks for an international audience.
Country format references are useful for documentation, QA, and support. They are not a replacement for a validator, because a format table alone cannot detect checksum errors.
In production flows, combine country format guidance with live structural validation.
IBAN format in Germany
DECountry code
Identifies Germany — ISO 3166-1 alpha-2.
89Check digits
Two-digit mod-97 checksum.
37040044BLZ
Bankleitzahl — 8-digit German bank routing code.
0532013000Account number
10-digit domestic account number (Kontonummer).
Use the filters below to compare IBAN markets, lengths, currencies, and SEPA participation without leaving the guide.
SEPA (Single Euro Payments Area) — 36 European countries where a single IBAN is enough to send a payment, no extra codes needed.
Yes. Length depends on the country, not on one universal IBAN rule.
No. It is better to validate automatically and show clear inline guidance.
This tool checks format only. It validates structure and checksum, but does not confirm that a bank account exists, is active, belongs to a person, or can receive payments. It does not perform financial, identity, or bank verification.
What Is an IBAN?
Understand what an IBAN is, what each part means, and when people need one for real payments.
How IBAN Validation Works
A practical breakdown of country checks, fixed lengths, and the MOD-97 checksum used in IBAN validation.
Common IBAN Errors
See the most frequent reasons an IBAN fails validation and how to prevent bad banking data from entering your workflow.
Use the main validator when you need a fast structural check. Use support guides when you need deeper context, implementation detail, or troubleshooting help.
Open IBANWhat Is an IBAN?
Understand what an IBAN is, what each part means, and when people need one for real payments.
How IBAN Validation Works
A practical breakdown of country checks, fixed lengths, and the MOD-97 checksum used in IBAN validation.
IBAN vs SWIFT/BIC
See the difference between IBAN and SWIFT/BIC, what each identifier is for, and when transfers need both.
IBAN vs Card Number
Understand why IBAN and card numbers belong to different payment systems and should never be used interchangeably.
Common IBAN Errors
See the most frequent reasons an IBAN fails validation and how to prevent bad banking data from entering your workflow.