Plesnois was formerly part of the German Empire. In the German Empire, the place was called Plenach.
The place is now called Plesnois and belongs to France.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Plesnois | German Empire | Metz | before the Versailles Treaty |
| Plenach | German Empire | Metz | before the Versailles Treaty |
| Plesnois | France | Moselle | after the Versailles Treaty |
| Plenach | German Empire | Metz | 1940 |
| Plesnois | France | Moselle | 1945 |
| Plesnois | France | Moselle | 1993 |