NN (Plesnik) was formerly part of the German Empire. In the German Empire, the place was called Plesnik.
The place is now called NN and belongs to Slovenia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| NN (Plesnik) | Austro-Hungary | Cilli/Celje | before the Treaty of Saint-Germain |
| Plesnik | Yugoslavia | Gornji grad | after the Treaty of Saint-Germain |
| Plesnik | German Empire | Cilli | 1941 |
| NN | Yugoslavia | Celje | 1945 |
| NN | Yugoslavia | Socialistična rep. Slovenija | 1992 |
| NN | Slovenia | Slowenien | 1991 |