Provinces of Belgium
The country of Belgium is divided into three regions. Two of these regions, the Flemish Region or Flanders, and Walloon Region, or Wallonia, are each subdivided into five provinces. The third region, the Brussels-Capital Region, is not divided into provinces, as it was originally only a small part of a province itself.
List of National Roads in Belgium
Most of the roads of the third and fourth networks have a first digit that identifies the province: N1xx for Antwerp, N2xx for ex Brabant, N3xx for West Flanders, N4xx for East Flanders, N5xx for Hainaut, N6xx for Liège, N7xx for Limburg, N8xx for Luxemburg and N9xx for Namur. This first digit corresponds with the NIS code of the provinces.