| 1 | 9X | Diamond International Airlines, Inc. | Designator 9X reinstated by IATA | USA | AVCODES |
| 2 | 9X | Tasawi Air Services Ltd. | ICAO: TWI, Callsign: Tasawi, Designator 9X* recalled by IATA | PL | AVCODES |
| 3 | 9X | Air Columbia | ICAO: ACO, Callsign: Spada, Name changed to Transporti Aerei Italiani S.r.l. | I | AVCODES |
| 4 | 9X | Ontario Express Ltd. | ICAO: OEL, Callsign: Partner, Canadian Partner | CDN | AVCODES |
| 5 | 9X | Transporti Aerei Italiani S.r.l. | ICAO: ACO, Callsign: Spada, ICAO designator changed to ACL. Name changed from Air Columbia | I | AVCODES |
| 6 | 9X | Transporti Aerei Italiani S.r.l. | ICAO: ACL, Callsign: Spada, Name changed to Itali Airlines s.r.l. ICAO designator changed from ACO | I | AVCODES |
| 7 | 9X | Itali Airlines s.r.l. | ICAO: ACL, Callsign: Itali, Name changed from Transporti Aerei Italiani S.r.l. ICAO designator changed from ACO | I | AVCODES |
| 8 | 9X | Congo Express | ICAO: CXR, Callsign: Congo Express, | ZRE | AVCODES |
| 9 | 9X | Executive Express Aviation LLC d/b/a Southern Airways | | USA | AVCODES |
| 10 | 9X | Southern Airways Express, LLC | ICAO: FDY, Callsign: Friendly, | USA | AVCODES |
