Vi har så langt registrert 19 632 rederier
| Navn | Grunnlagt | | C. A. Føyen, Tønsberg | |
| C. A. Hansen, Fredrikstad | |
| Caiano RoRo A/S, Oslo | |
| Cairn Line of Steamships Ltd. v/ Cairns, Noble & Co. | |
| C. A. Jensen & Paul Hansen, Sarpsborg | |
| C. A. Jensen, Sarpsborg | |
| C. A. Jørgensen, Filtvedt / Drøbak | |
| C. A. Larsen, Kragerø | |
| C. A. Larsen, Tønsberg | |
| California Sea Products Co., San Francisco, California, USA | |
| California Whaling Co., San Francisco, California, USA | |
| Calma, Dundee | |
| Calmar S.S. Corp, New York | |
| Calmar Steam Ship Corp. | |
| C. A. Lykke, Lillesand | |
| Camar A/S, Bergen | |
| C. Ameln & Sønner, Bergen | |
| Camillo Bastrup m/ fl., Kristiansand | |
| Camillo Mordt, Fredrikstad | |
| Camillo Mørch, Fredrikstad | |
| Camilo Eitzen, Kristiania / Oslo | |
| Canada Government Fisheries & Oceans, Ottawa, Canada. | |
| Canadian Australian Line Ltd | |
| Canadian Government v/ Park Steam Ship Co. Ltd. Montreal, Canada | |
| Canadian National Steamship, Montreal | |
