Belgian regions and municipalities with INS codes and postal codes (nomenclature from 1/01/2025)

Belgian regions and municipalities with INS codes and postal codes (nomenclature from 1 January 2025)Method: the
processing is based on the comparison of two sets of data, namely the
recovery of the dataset of the postal cantons of Bpost and the dataset of
data Administrative Units – Municipalities of the General Administration of the
Financial documentation from the FPS Finance. Constraints: in
In most cases, there is a one-to-one relationship between postal codes.
and the codes of the municipalities, with the exception of 1040 (Etterbeek), 1050 (Ixelles) and
1804 (Cargovil).

More info: https://statbel.fgov.be/en/propos-de-statbel/methodology/classifications/geography