NN was formerly part of the German Empire. In the German Empire, the place was called Seewörth.
The place is now called NN and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Seewörth | German Empire | Posen Ost | before the Versailles Treaty |
| NN | Poland | Poznań | after the Versailles Treaty |
| Seewörth | German Empire | Posen | 1939 |
| NN | Poland | Poznań m. | 1945 |
| NN | Poland | Poznań | 1992 |