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Flemish Address Checker → JSON

Type an address in Flanders (or Brussels street names). Pick a suggestion to get the official address record.

Local: no. The address is sent to the Geolocation API Flanders and Basisregisters Flanders address service.

Tip: use ↓ ↑ and Enter to pick a suggestion.

🌐 External lookup: suggestions and matches come directly from Digitaal Vlaanderen’s public APIs (geo.api.vlaanderen.be and api.basisregisters.vlaanderen.be). What you type is sent to them, not to us.

The official address register of Flanders

The Adressenregister (formerly CRAB) is the authoritative list of all addresses in Flanders. Municipalities maintain it and Digitaal Vlaanderen publishes it as one of the Basisregisters Vlaanderen. Every address has a persistent identifier and URI, a status and a position in Belgian Lambert 72 coordinates. Storing that identifier instead of free text keeps a customer or asset database clean when streets are renamed or municipalities merge.

How the check works

  1. As you type, the public geolocation suggestion service proposes matching addresses.
  2. When you pick one, or submit a full address, AdresMatch compares it with register entries and returns candidates with a match score.
  3. The result shows the official address object: street, house number, box number, postcode, municipality, status, ID and position.

Sample result

Input       Korenmarkt 1 9000 Gent
Match       Korenmarkt 1, 9000 Gent       score 100
Status      inGebruik (in use)
Address ID  persistent ID and URI from the register
Position    Lambert 72 x / y (EPSG:31370)
Output      JSON you can store instead of free text

Edge cases

  • Status. An address can be voorgesteld (proposed), inGebruik (in use) or gehistoreerd (retired). A retired address still matches but should not be used for new records.
  • Box numbers. Apartments have separate register entries per box (busnummer); matching the building only gives the main address.
  • Municipal mergers. After the 2025 mergers, the municipality name can differ from the postcode's place name. The municipality merger mapper shows the old and new names.
  • Outside Flanders. Brussels and Walloon addresses are kept in their own registers (UrbIS, ICAR) and may not match here.
  • Score below 100 means a typo, a missing house number or an outdated street name; check the candidate before you store it.

Who uses it

Public services, utilities and companies that deliver or invoice at Flemish addresses use the register ID as a stable key, and anyone filling in an official form can check that an address is written exactly as the register knows it.

Look up postcodes with the Belgian postcode lookup, convert the Lambert position to GPS with the Lambert 72 converter, and find the responsible services with who is responsible for my address.

Frequently asked questions

What is the Flemish Adressenregister?

It is the official register of all addresses in Flanders, formerly called CRAB, maintained by municipalities and published by Digitaal Vlaanderen. Each address has a persistent ID, a status and a Lambert 72 position.

Does it check addresses in Brussels and Wallonia?

Not reliably. Brussels and Wallonia keep their own registers, so their addresses may not match. Use the postcode lookup for a quick check outside Flanders.

What does the match score mean?

It shows how closely the address you entered matches a register entry. 100 is an exact match; lower scores point to typos, missing numbers or old street names.

Why store the address ID?

The ID stays the same when a street is renamed or a municipality merges, so your records keep pointing to the right address.

Is my address sent anywhere?

Yes, to the public Flemish geolocation and AdresMatch services, because the register is online. GratisTools does not store it.