| Registered | Name | Holder | Registrar |
|---|---|---|---|
| 2020-08-25 | 6tvans.fi | 6T Solutions OY | Zoner Oy |
| 2015-05-20 | 6t.fi | 6T Solutions Oy | Zoner Oy |
| 2012-12-31 | castelloservice.fi | 6T Solutions Oy | Zoner Oy |
| 2012-12-31 | castellocomposite.fi | 6T Solutions Oy | Zoner Oy |
| 2012-12-31 | castellohovercrafts.fi | 6T Solutions Oy | Zoner Oy |
| 2012-12-31 | castellospas.fi | 6T Solutions Oy | Zoner Oy |
| 2012-12-31 | castellotrailers.fi | 6T Solutions Oy | Zoner Oy |
| 2005-01-11 | castelloboats.fi | 6T Solutions Oy | Zoner Oy |