| Carrier Code | Carrier Name |
| ICTW | INTERCONTINENTAL COAL TRANSPORT INC |
| ICUU | INDEPENDENT CONTAINER LINE (ICL) |
| IDBU | INDEPENDENT CARRIBEAN LINES LTD |
| IDKO | ISLAND TANKER NO 1 SHIPPING INC |
| IDKP | ISLAND TANKER NO 2 SHIPPING INC |
| IDKT | INLAND LAKES TRANSPORTATION |
| IDMC | INDUSTRIAL MARITIME CARRIERS INC |
| IDNL | ITALIA DI NAVIGAZIONE-LLOYD TRIESTINO DI NAVIGAZIONE TRANS-PACIFIC |
| IDON | IDONEA ARMADORA (BERMUDA) LTD |
| IECU | ISLAND EQUIPMENT COMPANY |
| IELU | INTERNATIONAL EQUIPMENT LEASING INC |
| IEMU | INTERNATIONAL EQUIPMENT MARKETING INC |
| IFFU | IFF INTERNATIONAL SPEDITION |
| IFHC | INDUSTRIAL FREIGHTERS CORPORATION |
| IFIS | INTERNATIONAL FREIGHT SYSTEMS INC |
