NN was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Zádub-Závišín and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| NN (Zádub-Závišín) | Austro-Hungary | Marienbad | before the Treaty of Saint-Germain |
| NN | Czechoslovakia | Mariánské Lázně | after the Treaty of Saint-Germain |
| NN | German Empire | Marienbad | 1938 |
| NN | Czechoslovakia | Mariánské Lázně | 1945 |
| Zádub-Závišín | Czechoslovakia | Cheb | 1992 |
| Zádub-Závišín | Czech Republic | Cheb | 1993 |