NN was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Zruč-Senec and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| NN (Zruč-Senec) | Austro-Hungary | Pilsen | before the Treaty of Saint-Germain |
| NN | Czechoslovakia | Plzeň | after the Treaty of Saint-Germain |
| NN | German Empire | Pilsen | 1939 |
| NN | Czechoslovakia | Plzeň | 1945 |
| NN | Czechoslovakia | Plzeň-sever | 1992 |
| Zruč-Senec | Czech Republic | Plzeň-sever | 1993 |