Söllstedt was formerly part of the German Empire. In the German Empire, the place was called Söllstedt.
The place is now called Sølsted (Tønder-Sølsted) and belongs to Denmark.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Söllstedt | German Empire | Tondern | before the Versailles Treaty |
| Sølsted | Denmark | Tønder | after the Versailles Treaty |
| Sølsted (Tønder-Sølsted) | Denmark | Sønderjylland | 1993 |