NN was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now abandoned and the area belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Johannesdorf | Austro-Hungary | Wagstadt | before the Treaty of Saint-Germain |
| Janová | Austro-Hungary | Wagstadt | before the Treaty of Saint-Germain |
| Janová | Czechoslovakia | Bílovec | after the Treaty of Saint-Germain |
| NN | German Empire | Wagstadt | 1938 |
| NN | Czechoslovakia | Bílovec | 1945 |
| - aufgelassen - | Czechoslovakia | Ostrava-město | 1992 |
| - aufgelassen - | Czech Republic | Ostrava-město | 1993 |