U Mostu was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called U Mostu and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Egerbrück | Austro-Hungary | Karlsbad | before the Treaty of Saint-Germain |
| U Mostu | Czechoslovakia | Karlovy Vary | after the Treaty of Saint-Germain |
| Egerbrück | Czechoslovakia | Karlovy Vary | after the Treaty of Saint-Germain |
| NN | German Empire | Karlsbad | 1938 |
| NN | Czechoslovakia | Karlovy Vary | 1945 |
| U Mostu | Czechoslovakia | Karlovy Vary | 1992 |
| U Mostu | Czech Republic | Karlovy Vary | 1993 |