NN was formerly part of the German Empire. In the German Empire, the place was called Walddorf.
The place is now called NN and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Alischken | German Empire | Insterburg | 1928 |
| Walddorf | German Empire | Insterburg | 1939 |
| Valˈddorf | Under Soviet administration | Kaliningrad | 1945 |
| NN | Russian Federation | Černjahovsk | 1992 |