| 1 | MES | Mesaba Aviation, Inc. | IATA: XJ, Callsign: Mesaba, IATA Prefix: 582, Founded in 1944 as Mesaba Aviation. Commenced operations 04 February 1974. Ceased operations on 04 January 2012 (merged with Pinnacle Airlines). Designator XJ reinstated by IATA | USA | AVCODES |
| 2 | MES | Mesaba Airlines | IATA: XJ | | ICAO1 |
| 3 | MESB | MIDWES | | | SCAC4 |
| 4 | MESD | MAIN ELECTRONIC SUPPLIES LTD | | | SCAC4 |
| 5 | MESEA | Société en charge de la LGV SEA (Tours - Bordeaux) | | F | TRAFFIC |
| 6 | MESG | MESCALERO GAS CO | | | SCAC4 |
| 7 | MESH | MOUNTAIN ENERGY SERVICES INC | | | SCAC4 |
| 8 | MESK | MARINE EXPRESS SHIPPING INC | | | SCAC4 |
| 9 | MESL | MESA LOGISTICS | | | SCAC4 |
| 10 | MESM | MAINE ENERGY SYSTEMS LLC | | | SCAC4 |
| 11 | MESP | MEGA SHIPPING LINE CORP | | | SCAC4 |
| 12 | MESQ | MESA TRANSPORTATION | | | SCAC4 |
| 13 | MEST | MEST, JOHN D TRUCKING | | | SCAC4 |
| 14 | MESU | NEST LTD INTERNATIONAL TRANSPORTS FLEXITANK SERVICES | | GR | BIC |
| 15 | MESU | MIDDLE EAST SHIPPING AGENCIES OVERS | | | SCAC4 |
| 16 | MESW | MESA AUTO WHOLESALERS | | | SCAC4 |
| 17 | MESX | Mears/CPG, Inc. | added 7/1998; 7/2000; eliminated 1/2002; 7/2005 (not listed) | | NAKINA |
| 18 | MESX | Mears/CPG, Inc. | added 7/98; 7/2000 | | NRHS |
| 19 | MESX | MEARS/CPG INC. | | | PWRC |
| 20 | MESX | Mears/CPG | | | RSRV |
| 21 | MESX | MEARS/CP | | | SCAC4 |
| 22 | MESZ | MEHAN SERVICE | | | PWRC |
| 23 | MESZ | Mesztegnyö | Real: MEEV | H | TRAFFIC |
