Plassdorf was formerly part of the German Empire. In the German Empire, the place was called Plaßdorf.
The place is now called Blahuňov and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Plassdorf | Austro-Hungary | Komotau | before the Treaty of Saint-Germain |
| Blahuňov | Austro-Hungary | Komotau | before the Treaty of Saint-Germain |
| Blahuňov | Czechoslovakia | Chomutov | after the Treaty of Saint-Germain |
| Plaßdorf | Czechoslovakia | Chomutov | after the Treaty of Saint-Germain |
| Plaßdorf | German Empire | Komotau | 1938 |
| Blahuňov | Czechoslovakia | Chomutov | 1945 |
| Blahuňov | Czechoslovakia | Chomutov | 1992 |
| Blahuňov | Czech Republic | Chomutov | 1993 |