| Carrier Code | Carrier Name |
| WOSH | WORLD SHIPPING INC |
| WPFR | WEPFER MARINE INC |
| WPMU | WESTERN PACIFIC RAILROAD COMPANY (UNION PACIFIC RAILROAD CO) |
| WPOL | WESTPORT LINE, INC, THE |
| WQVE | WAVE MARINE LIMITED |
| WRRR | WARRIER-TOMBIGBEE TRANSPORTATION CO INC |
| WSAU | WEST COAST OF SOUTH AMERICA/ATLANTIC & GULF |
| WSCY | WATERS SHIPPING COMPANY INC |
| WSDU | WIDE SHINE DEVELOPMENT LTD |
| WSFU | WASHINGTON STATE FERRIES |
| WSPP | WALES SHIPPING COMPANY LTD |
| WSSG | WESTSTAR SHIPPING LTD OWNERS OF THE MV ADEL |
| WSSH | WALDRON STEAMSHIP CO LTD |
| WSTU | WESTAM SHIPPING SA PANAMA |
| WTEU | WORLD WIDE TRANSPORT |
