Payments
Form Z-01
Check an IBAN
Checked on your device
Explanation
Check an IBAN in three steps
Paste the number
With or without spaces, in upper or lower case. Convert an old Belgian number further down.
Zegel does the maths
The length for the country, the check digits (modulo 97) and, for a Belgian number, the old check digits inside it too.
Copy it or make a QR code
Copy the number neatly in groups of four, or make a payment QR code with it straight away.
At the counter
Good to know
Does a valid IBAN mean the account exists?
No. It means the number is well formed, so a typo almost always shows up. Only the bank knows whether the account is open and who it belongs to.
Where does the bank name come from?
From the list of identification codes published by the National Bank of Belgium. The three digits after BE and the check digits point to the bank. The list is in the sources, with its date.
Does my IBAN go to a server?
No. The check and the bank list are built into the page itself. Nothing leaves your device.
Sources
What this tool relies on, with the date we checked it.
- StandardIBAN Registry (lengths per country)
- DataIdentificatiecodes van de Belgische banken (volledige lijst, versie 01/09/2026)
Texts reviewed on 21 October 2026
Zegel checks and calculates, but gives no legal or tax advice. If in doubt, ask your accountant or the relevant authority.
Payments
In the same drawer
- Z-02Structured communicationMake or check a +++123/4567/89002+++, in batches too.
- Z-03Make a payment QR codeA QR code your banking app can read: name, IBAN, amount and reference already filled in.
- Z-04Late-payment interestThe statutory interest and the 40 euro on an invoice paid late.
- ZAll toolsAll 13 Belgian chores at a glance