NN (Mikołajówka) was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Mikołajówka and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| NN (Mikołajówka) | Russian Empire | Suvalki | 1914 |
| Mikołajówka | Poland | Suwałki | 1921 |
| NN | German Empire | Sudauen | 1939 |
| NN | Poland | Suwałki | 1945 |
| Mikołajówka | Poland | Suwałki | 1992 |