| Carrier Code | Carrier Name |
| WGSU | WG SALARI BV |
| WHCU | WESTINGHOUSE HANFORD CO |
| WHPR | WHITMORE PROPERTIES L T D |
| WHSG | WIGHTMAN SHIPPING CO INC |
| WICU | WIKING TRADING AB |
| WIFL | WASHINGTON ISLAND FERRY LINE INC |
| WINU | WINN INTERNATIONAL CONTAINERS LTD |
| WISU | W I S A |
| WITU | WITCO CORPORATION |
| WKIK | WAIKIKI LIMITED |
| WKJS | WALLNYK JOINT SERVICE |
| WKMR | WEEKS MARINE INC |
| WKTW | WALKER TOWING CORPORATION |
| WLIB | WILLIES INLAND BARGE SERVICE |
| WLNA | WALLENIUS LINES AB |
