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Independent · free · in your browser

The counter that never closes.

IBAN, VAT number, structured communication, VAT amount or due date: Loket checks it in seconds. No queue, no account, and nothing leaves your device.

Try:
Loket·

The counter is open. Paste an IBAN, a VAT or enterprise number, a structured communication or a national register number.

Checked in your browser. Nothing goes to a server.

Why

Small mistakes, long queues

One digit copied wrong and weeks later you're standing at a real counter. Loket catches it before it gets that far.

  • 001

    One digit too many

    An IBAN with a typo costs a returned payment and a few days. The check digits catch it right away.

  • 002

    A refused reference

    A structured communication that doesn't add up is refused by the bank. Your customer calls, you search, the payment waits.

  • 003

    A wrong VAT number

    Your customer's VAT number must be right on an invoice. If it isn't, you get to explain it at an audit.

Browser extension

The counter in your toolbar

Select a number on a web page, click the Loket icon and see right away whether it's right. The same checks, without opening the site.

Install the extension
  1. Select an IBAN, VAT number or reference
  2. Click the Loket icon in your toolbar
  3. Read the answer: valid, or invalid

Who's behind it

Made by nealvdv

nealvdv builds websites and tools for small Belgian businesses. Loket is an own project, free for everyone: the rules are public, so checking should be too.

Loket is an independent tool. It is not a government service and doesn't speak for the FPS Finance, the KBO/BCE, the national register or your bank.

The counter is open

Pick a counter and try it with a number of your own. Missing a counter you need every week? Let us know.

Reading comfort

Choose what helps. Your choice is kept on this device.

Text size

Prefer your device’s own settings (zoom, screen reader, dark mode)? They work here too.