| 1 | CTN | Croatia Airlines | IATA: OU, Callsign: Croatia, IATA Prefix: 831, | HR | AVCODES |
| 2 | CTN | Croatia Airlines | IATA: OU | | ICAO1 |
| 3 | CTN | Canton R.R. Co. | 7/1932-1/1980; eliminated 7/1993; 1/1994 (not listed); 7/2000-7/2005 | | NAKINA |
| 4 | CTN | The Canton R.R. | 8/1920-7/1930 | | NAKINA |
| 5 | CTN | Canton R.R. Co. | 4/38-1/80; eliminated 7/93; 1/94-7/2000 | | NRHS |
| 6 | CTN | The Canton R.R. | 23-Jul | | NRHS |
| 7 | CTN | CANTON RAILROAD COMPANY | | | PWRC |
| 8 | CTN | Canton Railroad | | | RSRV |
| 9 | CTN | CANTON RAILROAD COMPANY | | | SCAC4 |
| 10 | CTNB | CHRISTINE TRANSPORT LLC | | | SCAC4 |
| 11 | CTNC | CONTINENTAL COAST TRUCKING CO INC | | | SCAC3 |
| 12 | CTND | COLTRANS INC (NUCLEAR TRANSPORT DIV | | | SCAC3 |
| 13 | CTND | CONSTRUCCIONES Y TRANSPORTES D A D | | | SCAC4 |
| 14 | CTNE | CALS TRUCKING INC | | | SCAC3 |
| 15 | CTNE | COE TRANSFER INC | | | SCAC4 |
| 16 | CTNF | CRAY TRANSFER & STORAGE CO INC | | | SCAC3 |
| 17 | CTNG | CONTINENTAL GROWER COOPERATIVE | | | SCAC3 |
| 18 | CTNH | CUTTERS TRANSPORT | | | SCAC3 |
| 19 | CTNH | CARGO TRANSPORTATION INC | | | SCAC4 |
| 20 | CTNI | CARLETON TRANSIT CO INC | | | SCAC3 |
| 21 | CTNJ | CORNEIL TRANSPORT LTD | | | SCAC3 |
| 22 | CTNK | CHAMPION TANKERS AS | | | SCAC4 |
| 23 | CTNL | COAST TANK LINES INC | | | SCAC3 |
| 24 | CTNL | COCO TRANSPORTATION LLC | | | SCAC4 |
| 25 | CTNN | C-A TRANSPORTATION INC | | | SCAC3 |
| 26 | CTNN | C-A TRANSPORTATION INC | | | SCAC4 |
| 27 | CTNO | CHARTER TERMINALS CO | | | SCAC3 |
| 28 | CTNO | CITRICOS TRES NACIONES SPR DE RL | | | SCAC4 |
| 29 | CTNP | CASCADES TRANSPORT INC | | | SCAC4 |
| 30 | CTNQ | COLORADO TRANSFER AND STORAGE | | | SCAC3 |
| 31 | CTNR | CONTINENTAL TRANSPORTATION CO INC | | | SCAC3 |
| 32 | CTNR | CONTROLLED TRANSPORTATION INC | | | SCAC4 |
| 33 | CTNS | CHOTIN, SCOTT, | | | SCAC3 |
| 34 | CTNS | CAPITAL TRANSPORTATION SOLUTIONS LL | | | SCAC4 |
| 35 | CTNT | CRITERION TRANSPORTION LTD | | | SCAC3 |
| 36 | CTNT | CHAD TRANSPORT INC | | | SCAC4 |
| 37 | CTNU | CONTARGO GMBH & CO. KG | | D | BIC |
| 38 | CTNU | CENTENNIAL TERMINALS & TRUCK LINES | | | SCAC3 |
| 39 | CTNV | CLANNIN TRUCKING INC (A NEVADA CORP | | | SCAC3 |
| 40 | CTNV | CANADIAN TRANSPORT NETWORK INC | | | SCAC4 |
| 41 | CTNW | CENTRAL CAL TRUCKING AND WAREHOUSIN | | | SCAC3 |
| 42 | CTNX | CCC Transport Co. | added 4/2006 | | NAKINA |
| 43 | CTNX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005; eliminated 4/2006 | | NAKINA |
| 44 | CTNX | General Electric Railcar Services Corp. | added 1/1999; eliminated 1/2000 | | NAKINA |
| 45 | CTNX | Continental Carbon Co. | added 7/1996; eliminated 1/1999 | | NAKINA |
| 46 | CTNX | Continental Carbon Co. | added 7/96; eliminated 1/99 | | NRHS |
| 47 | CTNX | General Electric Railcar Services Corp. | added 1/99; eliminated 1/2000 | | NRHS |
| 48 | CTNX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 49 | CTNX | CCC TRANSPORT [GE RAIL SERVICES CORP.; CONTINENTAL CARBON COMPANY] | | | PWRC |
| 50 | CTNX | Continental Carbon | | | RSRV |
| 51 | CTNX | CCC TRANSPORT COMPANY | | | SCAC4 |
| 52 | CTNY | COASTAL TRANSPORTATION COMPANY | | | SCAC3 |
