| 1 | CTB | City Bird | IATA: H2, Callsign: Dream Flight, Ceased operations on 04 October 2001. Designator H2* reinstated by IATA | B | AVCODES |
| 2 | CTB | City Bird | IATA: H2, Callsign: Dream Flight, Designator H2* recalled by IATA | B | AVCODES |
| 3 | CTB | Thomas Cook Airlines Balearics S.L. | IATA: H5, Callsign: Sunnyheart, Established in October 2017. Ceased operations on 31 January 2021 | E | AVCODES |
| 4 | CTB | Captrain Belgium NV | | BE | VKM |
| 5 | CTBA | CORONADO TRANSPORT INC | | | SCAC3 |
| 6 | CTBA | C2C TRANSPORTATION INC | | | SCAC4 |
| 7 | CTBB | COMPLETE TRUCK BROKERAGE INC | | | SCAC3 |
| 8 | CTBC | CALE TRANSPORT INC | | | SCAC3 |
| 9 | CTBE | COLONIAL TRANSIT INC | | | SCAC3 |
| 10 | CTBE | CARIBBEAN TRANSPORT EXPRESS INC | | | SCAC4 |
| 11 | CTBF | CHRISTIAN TRANSPORTATION | | | SCAC3 |
| 12 | CTBG | CONDOR TRANSPORT INC | | | SCAC3 |
| 13 | CTBH | CAROLINA TRUCK BROKERS INC | | | SCAC3 |
| 14 | CTBH | CLAYTON LOGISTICS LLC | | | SCAC4 |
| 15 | CTBI | CHRISTIAN TRANSPORT INC | | | SCAC3 |
| 16 | CTBI | CTB TRANSPORTATION INC | | | SCAC4 |
| 17 | CTBK | CONTINENTAL TRUCK BROKERS INC | | | SCAC4 |
| 18 | CTBM | CHAMPION PRODUCTS | | | SCAC4 |
| 19 | CTBN | CONTE TRANSPORTATION CO | | | SCAC3 |
| 20 | CTBO | CONTACT TRUCKING CORP | | | SCAC3 |
| 21 | CTBO | CJT LOGISTICS INC | | | SCAC4 |
| 22 | CTBP | COLONIAL TAXI CO | | | SCAC3 |
| 23 | CTBP | CARTERS TRUCKING & BLACKTOPPING INC | | | SCAC4 |
| 24 | CTBQ | CITY BONDED MESSENGER & TRUCKING SE | | | SCAC3 |
| 25 | CTBQ | CASTILLO TRANSPORT | | | SCAC4 |
| 26 | CTBR | CHRISTENSEN BROS TRUCKING INCORPORA | | | SCAC3 |
| 27 | CTBR | COAST TO COAST AUTO/MARINE TRANSPOR | | | SCAC4 |
| 28 | CTBS | C T SOUTHERN INC | | | SCAC3 |
| 29 | CTBT | C T B TRUCKING INC | | | SCAC3 |
| 30 | CTBT | CTB TRUCK BROKERAGE INC | | | SCAC4 |
| 31 | CTBU | CONTAINER TRADER LTD. | | BG | BIC |
| 32 | CTBV | CUSTOM TRANSPORT, INC | | | SCAC3 |
| 33 | CTBV | CUSTOM TRANSPORT INC | | | SCAC4 |
| 34 | CTBW | CAROLINA TRANSPORT OF BURGAW INC | | | SCAC4 |
| 35 | CTBY | CHELATCHIE TRUCKING INC | | | SCAC3 |
| 36 | CTBY | CRYSTAL CLEAR FREIGHT INC | | | SCAC4 |
