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