Hello,

We do not repeat post codes and city names on addresses in Belgium.

The entire country is covered by postal_code boundary relations, e.g. every point within this area is automatically recognised as having post code 1750.
https://www.openstreetmap.org/relation/3942878

The zone system is less error-prone than encouraging every mapper to fill all the fields in the iD editor and ending up with lots of faulty data.

If you don’t mind, I will erase the unnecessary tags on the address of this building.