API documentation

Autocomplete Belgiumbeta

Belgian addresses can be supplemented with this API call. The documentation for Dutch addresses can be found under autocomplete Netherlands.

The following information is required to fully validate a Belgian address:

  • Postal number (also available from location)
  • Street
  • House number (with possibly a subaddress indication such as apartment or bus number)

There are various API calls available to create a user-friendly application where post number, place and street can be supplemented by only specifying the first numbers / letters.

Mandatory parameters

Use one of the two mandatory parameters:

  • be_fourpp: enter the Belgian postal code (partial or full 4 digits), for province, municipality and city information.
  • be_city: enter a (partial) Belgian city name, for province, municipality and postal code information.

Optional parameters

  • street: enter a (partial) street to receive a list of streets that meet the specified (partial) street name. To be able to validate a street, the be_fourpp parameter is also mandatory.
  • streetnumber: enter a house number. To be able to validate a house number, the full be_fourpp and street are required.
  • subaddress: enter a sub-address (e.g. bus number or apartment number). To be able to validate a sub-address the full be_fourpp, street and streetnumber are required.
  • language: Specify the language in which the city and street data are searched. Options are nl and fr. Both languages are searched by default.
  • per_page: the maximum number of results that are returned. The default is 10.
Alert: Fields ‘province’, ‘municipality’, ‘city’ and ‘street’ have been included in the results for a short time. Since the export became multilingual at the beginning of July 2015, the ‘province_en’, ’province_fr’, ’municipality_en’, ’municipality_en’, ’city_en’, ’city_fr’, ’street_en’ and ’street_fr’ fields should be used.


Postcode Request


This request gives the following result:

  "status": "ok",
  "results": [
      "province_nl": "Brussel",
      "province_fr": "Bruxelles",
      "municipality_nl": "Sint-lambrechts-woluwe",
      "municipality_fr": "Woluwe-saint-lambert",
      "city_nl": "Sint-lambrechts-woluwe",
      "city_fr": "Woluwe-saint-lambert",
      "fourpp": 1200,
      "lat": null,
      "lng": null

Street request

In this example, in addition to requesting a partial street name, the XML output format is also chosen.


This request gives the following result:

<?xml version="1.0" encoding="UTF-8"?>
      <street_nl>A. Marinusgaarde</street_nl>
      <street_nl>A.en M.L. Servais-Kinetstraat</street_nl>
      <street_nl>A.J. Slegersgaarde</street_nl>
      <street_fr>Avenue Lambeau</street_fr>

Error messages

  • Invalid be_fourpp format
    Het formaat dient te bestaan uit 4 cijfers. Extra spatiëring en gebruik van hoofd- of kleine letters worden automatisch gecorrigeerd.
  • Street number not found
    De ‘street number’ parameter is meegegeven maar het opgegeven huisnummer bestaat niet volgens onze database.

Example code

The autocomplete method is demonstrated in these ready-to-use examples: