| Carrier Code | Carrier Name |
| MACU | MARINE AUTO & CARGO SERVICES INTERNATIONAL |
| MADU | MAGNUM SPEDITIONGESELLSCHAFT GMBH |
| MAEU | MAERSK LINE |
| MAGP | MARITIME AGENCIES OF THE PACIFIC LTD |
| AMERICAN MAIL LINE LTD | |
| MAIU | MARINE ATLANTIC INC |
| MALT | MARINE ATLANTIC LTD |
| MAOS | MARINA OVERSEAS SHIPPING INC |
| MAPR | MARINE PIONEER SHIPPING LIMITED |
| MARU | MARCON LINE LTD |
| MARY | MARYTANK SHIPPING CORP |
| MASQ | MASSOEL S A |
| MASU | MAT TRANSPORT AG |
| MATU | MATSON NAVIGATION CO |
| MAVU | MARITIMA ARGUA LINE |
