Kienberg was formerly part of the German Empire. In the German Empire, the place was called Kienberg.
The place is now called Ojstrica and belongs to Slovenia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Kienberg | Austro-Hungary | Wolfsberg | before the Treaty of Saint-Germain |
| Ojstrica | Austro-Hungary | Wolfsberg | before the Treaty of Saint-Germain |
| Ojstrica | Yugoslavia | Dravograd | after the Treaty of Saint-Germain |
| Kienberg | German Empire | Wolfsberg | 1941 |
| Ojstrica | Yugoslavia | Maribor | 1945 |
| Ojstrica | Yugoslavia | Socialistična rep. Slovenija | 1992 |
| Ojstrica | Slovenia | Slowenien | 1991 |