NN was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called NN and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ludwigsdörfel | Austro-Hungary | Schluckenau | before the Treaty of Saint-Germain |
| Ludvíkovičky | Czechoslovakia | Šluknov | after the Treaty of Saint-Germain |
| Ludwigsdörfel | Czechoslovakia | Šluknov | after the Treaty of Saint-Germain |
| NN | German Empire | Schluckenau | 1938 |
| NN | Czechoslovakia | Rumburk | 1945 |
| NN | Czechoslovakia | Děčín | 1992 |
| NN | Czech Republic | Děčín | 1993 |