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