How to Write an Address in Belgium: Format, Postcodes and Examples

International  |  September 30, 2026  |  2 min read

Addresses in Belgium follow their own order and postcode rules. This guide shows how to write one correctly, with real postcode examples and the most common mistakes, whether you are sending mail, building a checkout form or preparing test data.

Address format

Street name, house number and box number, then postcode and municipality.

Belgium postcode format

Format: 9999

Belgian postcodes have four digits. Codes starting with 1 cover Brussels and Brabant, and the first digit gives a rough region elsewhere.

More examples

Sending to Belgium from abroad

Write the address exactly as it is used locally, then add the country name in capital English letters on the last line.

Tips and common mistakes

• The number follows the street name in both French and Dutch areas.
• Apartment boxes are written as bus in Dutch or bte in French.
• Brussels addresses can be written in French or Dutch.
• Keep the postcode before the municipality: 1000 Bruxelles.

Regions of Belgium

Belgium has 3 regions in our data. The region is rarely required in a postal address, but forms and databases often store it separately.

Test data for Belgium

There is no widely reserved fictional phone range here, so the generator leaves phone numbers out. Generated addresses use real towns and postcode areas with invented streets and names, so they are safe for form testing, mockups and documentation.