| 1 | M4 | Avioimpex A.D.p.o. | ICAO: AXX, Callsign: Impex, IATA Prefix: 743, Founded in 1992. Ceased operations in September 2002. Name changed from Interimpex - Avioimpex | MK | AVCODES |
| 2 | M4 | Nayzak Air Transport Company | ICAO: NZA, IATA Prefix: 728, Designator M4 reinstated by IATA | LAR | AVCODES |
| 3 | M4 | Polar Airlines de Mexico, S.A. de C.V. | ICAO: PMO, Ceased Operations | MEX | AVCODES |
| 4 | M4 | Smart Aviation Company | ICAO: SME, Callsign: Smart Aviation, Designator M4 recalled by IATA | ET | AVCODES |
| 5 | M4 | Mistral Air S.r.l. | ICAO: MSA, Callsign: Mistral Wings, Name changed to Poste Air Cargo S.r.l. October 2019. IATA Designator changed from 7M. ICAO callsign changed from Aiemerci | I | AVCODES |
| 6 | M4 | Poste Air Cargo S.r.l. | ICAO: MSA, Callsign: Mistral Wings, IATA Prefix: 408, Name changed from Mistral Air S.r.l. October 2019. IATA Designator changed from 7M. ICAO callsign changed from Aiemerci | I | AVCODES |
