Rödgen was formerly part of the German Empire. In the German Empire, the place was called Rödgen.
The place is now called Rödgen and belongs to Belgium.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rödgen | German Empire | Malmedy | before the Versailles Treaty |
| Rödgen | Belgium | Liège | after the Versailles Treaty |
| Rödgen | German Empire | Malmedy | 1940 |
| Rödgen | Belgium | Liège | 1945 |
| Rödgen | Belgium | Lüttich/Liège | 1993 |