| 1 | CTO | Aerotaxis Del Centro, S.A. | | MEX | AVCODES |
| 2 | CTO | Cape Air Transport | | AUS | AVCODES |
| 3 | CTO | Cape Air Transport | | | ICAO1 |
| 4 | CTOA | C TILE TRANSPORTATION INC | | | SCAC3 |
| 5 | CTOA | COMMERCIAL TRANSLOAD OF MINNESOTA | | | SCAC4 |
| 6 | CTOB | CHARISMA TOURS INC | | | SCAC3 |
| 7 | CTOB | CLANTON TRUCKING INC | | | SCAC4 |
| 8 | CTOC | CATALINA CRUISES | | | SCAC3 |
| 9 | CTOE | COAST TO COAST TRANSPORTATION INC | | | SCAC3 |
| 10 | CTOE | COAST TO COAST TRANSPORTATION INC | | | SCAC4 |
| 11 | CTOF | CHRISTOFFERSON MOVING & STORAGE | | | SCAC3 |
| 12 | CTOG | COAST TRAILER TOWING INC CORP | | | SCAC3 |
| 13 | CTOH | CARROLL TRANSIT | | | SCAC3 |
| 14 | CTOI | CENTROID GROUP LLC | | | SCAC4 |
| 15 | CTOJ | CAN-TRUCK TWO ZERO ZERO NINE (2009) | | | SCAC4 |
| 16 | CTOK | CAPITAL TRANSPORT CO | | | SCAC4 |
| 17 | CTOM | CONTAINER TRANSPORT INC | | | SCAC3 |
| 18 | CTOM | CUSTOM TRANSPORT INC | | | SCAC4 |
| 19 | CTOO | CUSTOM TRANSPORT | | | SCAC3 |
| 20 | CTOQ | CHARLOTTE TRANSPORTATION CO INC | | | SCAC3 |
| 21 | CTOQ | CAMCO TRANSPORTATION SERVICES | | | SCAC4 |
| 22 | CTOR | CIRCLE TOURS INC | | | SCAC3 |
| 23 | CTOS | CHARLIES TOWING SERVICE INC | | | SCAC3 |
| 24 | CTOS | CHARLIES TOWING SERVICE INC | | | SCAC4 |
| 25 | CTOT | CAL-TEX HOTSHOT | | | SCAC4 |
| 26 | CTOU | CENTAURI TRANSPORT, LLC | | USA | BIC |
| 27 | CTOU | CHEM-RAIL LO | | | PWRC |
| 28 | CTOU | Chem-Rail Logistics | | | RSRV |
| 29 | CTOV | CALTRANS TRUCKING INC | | | SCAC4 |
| 30 | CTOY | CONTEMPORARY TRAVEL | | | SCAC3 |
