Ullerup was formerly part of the German Empire. In the German Empire, the place was called Ulderup.
The place is now called Ullerup and belongs to Denmark.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ulderup | German Empire | Sonderburg | before the Versailles Treaty |
| Ullerup | Denmark | Sønderborg | after the Versailles Treaty |
| Ullerup | Denmark | Sønderjylland | 1993 |