NN was formerly part of the German Empire. In the German Empire, the place was called Gulpen.
The place is now called Gulpen and belongs to Belgium.
|Historical place name||Country||Administration||Time|
|NN (Gulpen)||German General Government of Belgium||Belgisch-Deutsches Gen.-Gouv.||before the Versailles Treaty|
|NN||Belgium||Liège||after the Versailles Treaty|
|Gulpen||German Empire||Eupen (einschl. Moresnet)||1940|