| 1 | 6C | Cape Smythe Air | ICAO: CMY, Callsign: Cape Smythe Air, Designator 6C recalled by IATA | USA | AVCODES |
| 2 | 6C | Carib Aviation Limited | ICAO: DEL, Callsign: Red Tail, IATA designator changed to 3Q | AG | AVCODES |
| 3 | 6C | Centrafrrique Air Express (C.A.E.) | | RCA | AVCODES |
| 4 | 6C | Austasia Airlines S.A. | IATA Prefix: 586, Name changed to Air Timor S.A. | TL | AVCODES |
| 5 | 6C | Air Timor S.A. | IATA Prefix: 586, Name changed from Austasia Airlines S.A. | TL | AVCODES |
| 6 | 6C | Connect Linhas Aereas S.A. | ICAO: CNT, Callsign: Connect Cargo, IATA Prefix: 677, AOC voluntarily revoked on 16 March 2020. | BR | AVCODES |
