| Carrier Code | Carrier Name |
| CILU | CONTAINER INVESTMENT LEASING ENGINEERING INC |
| CIMU | CIM LEASING LTD |
| CINU | CHAMBER INTERNATIONAL CHARTERS SRL |
| CIPA | CLIPPER AIR FREIGHT FORWARDERS (USA) |
| CIPL | CITY OF PORTLAND MAINE |
| CIPU | CONVOY INTERCONTINENTAL TRANSPORT (USA) INC |
| CISU | C I S CONTINENT-ISRAEL SCHIFFAHILSGESELLSCH MBH & CO |
| CISW | CENTRAL SHIPPING CO |
| CITU | CITROEN |
| CIZU | COOK ISLANDS NATIONAL LINE |
| CJBU | CONSTRUCTORS JOHN BROWN LTD |
| CJEC | CURRAN, JAMES E & CO INC |
| CJMS | CAJUN MARINE SERVICE INC |
| CJVU | CONSOLIDATED LEASING EUROPE LTD |
| CJZU | CHINA JAPAN INTERNATIONAL FERRY CO LTD |
