| 1 | MAH | MALEV Hungarian Airlines Public Limited Company (MALEV p.l.c.) | IATA: MA, Callsign: Malev, IATA Prefix: 182, Name changed to MALEV Hungarian Airlines Limited | H | AVCODES |
| 2 | MAH | MALEV Hungarian Airlines Limited | IATA: MA, Callsign: Malev, IATA Prefix: 182, Ceased operations on 03 February 2012 and declared bankrupt on 14 February 2012. Name changed from MALEV Hungarian Airlines Public Limited Company (MALEV p.l.c.) | H | AVCODES |
| 3 | MAH | Malév Hungarian Airlines | IATA: MA | | ICAO1 |
| 4 | MAH | Malév: Magyar Légiközlekedési Vállalat. | | H | TRAFFIC |
| 5 | MAHA | MAHALLY TRUCKING | | | SCAC4 |
| 6 | MAHC | M A H | | | SCAC4 |
| 7 | MAHD | MARIN TRUCKING INC | | | SCAC4 |
| 8 | MAHE | MAHEU | | | SCAC4 |
| 9 | MAHF | MAC-A-TAC EXPRESS INCORPORATED | | | SCAC4 |
| 10 | MAHG | MARKET RECYCLING INC | | | SCAC4 |
| 11 | MAHI | MARTINEZ, A PRODUCE CROP | | | SCAC4 |
| 12 | MAHK | M & A TRANSPORT INC | | | SCAC4 |
| 13 | MAHL | MOSS AND LAM INC | | | SCAC4 |
| 14 | MAHM | MINORITY AUTO HANDLING SPECIALISTS | | | SCAC4 |
| 15 | MAHP | MAC AMERICA INC | | | SCAC4 |
| 16 | MAHR | MAHER, R S & SON INC | | | SCAC4 |
| 17 | MAHS | MAHAJA | | | SCAC4 |
| 18 | MAHT | MAHOLTZ, J A TRUCKING INC | | | SCAC4 |
| 19 | MAHX | General American Transportation Corp. | 7/1937-4/1961; eliminated 10/1962 | | NAKINA |
| 20 | MAHX | Miller & Hart (General American Tank Car Corp.) | 7/1935 | | NAKINA |
| 21 | MAHX | Miller & Hart | 7/1930-7/1932 | | NAKINA |
| 22 | MAHX | Miller & Hart, Inc. (General American Transportation Corp.) | Apr-38 | | NRHS |
| 23 | MAHX | General American Transportation Corp. | 1/52-4/61 | | NRHS |
| 24 | MAHX | (GATC) MILLER & HART INC. | | | PWRC |
| 25 | MAHY | MARITIME HYDRAULIC REPAIR CENTER (1 | | | SCAC4 |
