NN (Ralsko) was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Ralsko and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| NN (Ralsko) | Austro-Hungary | Böhmisch-Leipa | before the Treaty of Saint-Germain |
| NN | Czechoslovakia | Česká Lípa | after the Treaty of Saint-Germain |
| NN | German Empire | Deutsch Gabel | 1938 |
| NN | Czechoslovakia | Česká Lípa | 1945 |
| Ralsko | Czechoslovakia | Česká Lípa | 1992 |
| Ralsko | Czech Republic | Česká Lípa | 1993 |