| Registered | Name | Holder | Registrar |
|---|---|---|---|
| 2026-05-26 | c2smart.fi | C2 SmartLight Oy | Domainkeskus Oy |
| 2020-04-30 | c2smartcity.fi | C2 SmartLight Oy | Planeetta Internet Oy |
| 2009-02-18 | katuvalokeskus.fi | C2 SmartLight Oy | Zoner Oy |
| 2007-10-30 | katuvalot.fi | C2 SmartLight Oy | Zoner Oy |
| 2004-08-11 | c2is.fi | C2 SmartLight Oy | DNA Oyj |
| 2003-09-01 | c2.fi | C2 Smartlight Oy | TNNet Oy |