| Carrier Code | Carrier Name |
| HWBU | HANS W BARBE |
| HWML | HERON WATERPALM MARINE LTD |
| HWSU | HIRAM WALKER AND SONS LTD |
| HYBU | HYBUR LTD |
| HYHT | HYANNIS HARBOR TOURS INC |
| HYKU | HIKORY |
| HYTU | HARBIN YINGYA S TRANSPORT |
| IACU | INTERNATIONAL ASSOCIATED CARGO CARRIER |
| IAGS | INTERMARE AGENCY SERVICES INC |
| IAPU | INTERNATIONAL ARENA PRODUCTIONS BV |
| IASC | INTER-AMERICA SHIPPING CORP |
| IASU | IOWA INTERSTATE RAILROAD LTD |
| IATU | INTERAGNET SRL |
| IBBU | IBC CARRIERS LTD |
| IBCG | INTERCONTINENTAL BULK CARGO LTD |
