| 1 | MCH | McAlpine Helicopters Ltd. | Callsign: Macline, | GB | AVCODES |
| 2 | MCH | McAlpine Helicopters Ltd. | Callsign: Macline Hayes, ICAO callsign changed to Macline | GB | AVCODES |
| 3 | MCH | McAlpine Helicopters | | | ICAO1 |
| 4 | MCHB | MICHELS CORPORATION | | | SCAC4 |
| 5 | MCHE | MICHEK TRANSPORTATION LLC | | | SCAC4 |
| 6 | MCHF | MINCHOFF FUEL OIL INC | | | SCAC4 |
| 7 | MCHK | M & CH TRUCKING INC | | | SCAC4 |
| 8 | MCHM | MATCHMAK | | | SCAC4 |
| 9 | MCHN | MITCHELL, NORBERT E CO INC | | | SCAC4 |
| 10 | MCHO | MITCHELL MOVING & STORAGE | | | SCAC4 |
| 11 | MCHQ | McHENRY TRUCK LINE, INC | | | SCAC1 |
| 12 | MCHQ | MICHAELS TRANSPORTATION | | | SCAC4 |
| 13 | MCHR | MACHINERIE S B INC | | | SCAC4 |
| 14 | MCHS | MITCHELL TRUCKING SERVICE | | | SCAC4 |
| 15 | MCHS | Ministerstvo po Cherezvychainym Situatsiyam | Ministry of Emergency Situations (EMERCOM) | RUS | TRAFFIC |
| 16 | MCHU | MAERSK A/S | | DK | BIC |
| 17 | MCHU | A P MOLLER | | | SCAC4 |
| 18 | MCHV | MARATHON CHEESE TRANSPORT LLC | | | SCAC4 |
| 19 | MCHX | Trinity Rail Management, Inc. | added 7/1997; 7/2000-7/2005 | | NAKINA |
| 20 | MCHX | Transcisco Leasing Co. | added 1/1991; 1/1994; eliminated 7/1997 | | NAKINA |
| 21 | MCHX | Transcisco Rail Services Co. | added 4/1990; eliminated 1/1991 | | NAKINA |
| 22 | MCHX | Railcar Maintenance Co. | added 10/1989; eliminated 4/1990 | | NAKINA |
| 23 | MCHX | PLM Railcar Maintenance Co. | added 4/1985; eliminated 10/1989 | | NAKINA |
| 24 | MCHX | Monsanto Chemical Co., Everett Plant | added 4/1954; 7/1954; eliminated 7/1955 | | NAKINA |
| 25 | MCHX | Monsanto Chemical Co., Merrimac Division | 4/1938-1/1952; eliminated 4/1954 | | NAKINA |
| 26 | MCHX | Merrimac Chemical Co. | 7/1937 | | NAKINA |
| 27 | MCHX | Merrimac Chemical Co., Inc. | 7/1930-7/1935 | | NAKINA |
| 28 | MCHX | Merrimac Chemical Co. | 8/1920-7/1923 | | NAKINA |
| 29 | MCHX | Merrimac Chemical Co. -- Monsanto Chemical Co., Merrimac Division | Apr-38 | | NRHS |
| 30 | MCHX | Monsanto Chemical Co., Merrimac Division | 1/52; eliminated 4/54 | | NRHS |
| 31 | MCHX | Monsanto Chemical Co., Everett Plant | added 4/54; eliminated 7/55 | | NRHS |
| 32 | MCHX | PLM Railcar Maintenance Co. | added 4/85; eliminated 10/89 | | NRHS |
| 33 | MCHX | Railcar Maintenance Co. | added 10/89; eliminated 4/90 | | NRHS |
| 34 | MCHX | Transcisco Rail Services Co. | added 4/90; eliminated 1/91 | | NRHS |
| 35 | MCHX | Transcisco Leasing Co. | added 1/91; 1/94; eliminated 7/97 | | NRHS |
| 36 | MCHX | Trinity Rail Management, Inc. | added 7/97; 7/2000 | | NRHS |
| 37 | MCHX | *MONSANTO CHEMICAL CO., MERRIMAC CHEMICAL CO. DIV. | | | PWRC |
| 38 | MCHX | +TRINITY RAIL MANAGEMENT INC. [TRANSCISCO LEASING COMPANY; PLM RAILCAR MAINTENANCE CO.] | | | PWRC |
| 39 | MCHX | Monsanto Chemical Co. (Trinity Rail Management) | | | RSRV |
| 40 | MCHX | TRINITY RAIL | | | SCAC4 |
| 41 | MCHX | Transcisco Rail Services Co. | | USA | TRAFFIC |
| 42 | MCHY | MCCLURE, H B COMPANY INC | | | SCAC4 |
| 43 | MCHZ | MERCKENS CHOCOLATE | | | PWRC |
