Alslev * was formerly part of the German Empire. In the German Empire, the place was called Alsleben norden der Au.
The place is now called Alslev and belongs to Denmark.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Alsleben norden der Au | German Empire | Tondern | before the Versailles Treaty |
| Alslev * | Denmark | Tønder | after the Versailles Treaty |
| Alslev | Denmark | Sønderjylland | 1993 |