Plassnitz was formerly part of the German Empire. In the German Empire, the place was called Plaßnitz.
The place is now abandoned and the area belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Plassnitz | Austro-Hungary | Neustadt a. d. Mettau | before the Treaty of Saint-Germain |
| Plasnice | Austro-Hungary | Neustadt a. d. Mettau | before the Treaty of Saint-Germain |
| Plasnice | Czechoslovakia | Nové Město nad Metují | after the Treaty of Saint-Germain |
| Plaßnitz | Czechoslovakia | Nové Město nad Metují | after the Treaty of Saint-Germain |
| Plaßnitz | German Empire | Grulich | 1938 |
| Plasnice | Czechoslovakia | Dobruška | 1945 |
| - aufgelassen - | Czechoslovakia | Rychnov nad Kněžnou | 1992 |
| - aufgelassen - | Czech Republic | Rychnov nad Kněžnou | 1993 |