| Carrier Code | Carrier Name |
| ISTY | ISLAND TANKER S A |
| ITAU | ITALIA DI NAVIGAZIONE |
| ITB | ISLAND TUG & BARGE LTD |
| ITBU | ITALMAGNESIO SA |
| ITCU | INTERCONTAINER |
| ITDU | INTERMODALTRASPORTI S R L |
| ITFU | INTERFERRY NV |
| ITGP | ITALCAL GROUP INC |
| ITHU | I T H INVESTITIONS-TREUHAND HANSEATIC GMBH & CO KG |
| ITIS | ITI SHIPPING S A |
| ITIU | INTERNATIONAL TRANSCHEM INC |
| ITKM | INTERLAKE STEAMSHIP COMPANY, THE |
| ITKU | INTERTANK LTDA |
| ITMA | ITALIA MARITTIMA S.P.A. |
| ITML | INTERNATIONAL TERMINAL COMPANY |
