| Carrier Code | Carrier Name |
| CMIA | COMMONWEALTH MARITIME AGENCY |
| CMIU | COMI CONSTRUCTIONS METALLIQUES INDUSTRIELLES |
| CMLU | CONTAINER MARINE LINES (DIVISION OF AMERICAN EXPORT LINES) |
| CMMT | COMMERCIAL TRANSPORT CORPORATION |
| CMMU | COMING SRL |
| CMNU | COMPAGNIE MAROCAINE DE NAVIGATION |
| CMPP | CHAMPION TRADER ANS |
| CMRE | CARLINES MARING TOWING INC |
| CMRV | COMPANIA MARITIMA VILLA NOVA S A |
| CMSU | CAMEROON SHIPPING LINES S A (NISSIN CORPORATION) |
| CMSV | CRC MARINE SERVICES |
| CMTU | CMS CONTAINER SERVICES |
| CMUU | CANADA MARITIME AGENCIES LIMITED |
| CMZU | COMPAGNIE MARITIME DU ZAIRE |
| CNCQ | CENTRAL CARGO CORPORATION |
