Rehthal was formerly part of the German Empire. In the German Empire, the place was called Rehtal.
The place is now called NN and belongs to France.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rehthal | German Empire | Saarburg | before the Versailles Treaty |
| Rehthal | France | Moselle | after the Versailles Treaty |
| Rehtal | German Empire | Saarburg (Westmark) | 1940 |
| Rehthal, Maison Forestière | France | Moselle | 1945 |
| NN | France | Moselle | 1993 |