Zülkowitz was formerly part of the German Empire. In the German Empire, the place was called Zinnatal.
The place is now called Sulków and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Zülkowitz | German Empire | Leobschütz | 1936 |
| Zinnatal | German Empire | Leobschütz | 1939 |
| Sulków | Under Polish administration | Głubczyce | 1945 |
| Sulków | Poland | Opole | 1992 |