Szielasken was formerly part of the German Empire. In the German Empire, the place was called Hallenfelde.
The place is now called Żelazki and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Szielasken | German Empire | Goldap | 1914 |
| Schielasken | German Empire | Goldap | 1914 |
| Hallenfelde | German Empire | Goldap | 1939 |
| Żelazki | Under Polish administration | Gołdap | 1945 |
| Żelazki | Poland | Suwałki | 1992 |