Sobczyn (Kr. Schlochau) was formerly part of the German Empire. In the German Empire, the place was called Söppen.
The place is now called Zapceń and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sobczyn (Kr. Schlochau) | German Empire | Schlochau | before the Versailles Treaty |
| Zapceń | Poland | Chojnice | after the Versailles Treaty |
| Söppen | German Empire | Konitz | 1939 |
| Zapceń | Poland | Chojnice | 1945 |
| Zapceń | Poland | Słupsk | 1992 |