| 1401 | MCHN | MITCHELL, NORBERT E CO INC | | | SCAC4 |
| 1402 | MCHO | MITCHELL MOVING & STORAGE | | | SCAC4 |
| 1403 | MCHQ | McHENRY TRUCK LINE, INC | | | SCAC1 |
| 1404 | MCHQ | MICHAELS TRANSPORTATION | | | SCAC4 |
| 1405 | MCHR | MACHINERIE S B INC | | | SCAC4 |
| 1406 | MCHS | MITCHELL TRUCKING SERVICE | | | SCAC4 |
| 1407 | MCHU | MAERSK A/S | | DK | BIC |
| 1408 | MCHU | A P MOLLER | | | SCAC4 |
| 1409 | MCHV | MARATHON CHEESE TRANSPORT LLC | | | SCAC4 |
| 1410 | MCHX | Trinity Rail Management, Inc. | added 7/1997; 7/2000-7/2005 | | NAKINA |
| 1411 | MCHX | Transcisco Leasing Co. | added 1/1991; 1/1994; eliminated 7/1997 | | NAKINA |
| 1412 | MCHX | Transcisco Rail Services Co. | added 4/1990; eliminated 1/1991 | | NAKINA |
| 1413 | MCHX | Railcar Maintenance Co. | added 10/1989; eliminated 4/1990 | | NAKINA |
| 1414 | MCHX | PLM Railcar Maintenance Co. | added 4/1985; eliminated 10/1989 | | NAKINA |
| 1415 | MCHX | Monsanto Chemical Co., Everett Plant | added 4/1954; 7/1954; eliminated 7/1955 | | NAKINA |
| 1416 | MCHX | Monsanto Chemical Co., Merrimac Division | 4/1938-1/1952; eliminated 4/1954 | | NAKINA |
| 1417 | MCHX | Merrimac Chemical Co. | 7/1937 | | NAKINA |
| 1418 | MCHX | Merrimac Chemical Co., Inc. | 7/1930-7/1935 | | NAKINA |
| 1419 | MCHX | Merrimac Chemical Co. | 8/1920-7/1923 | | NAKINA |
| 1420 | MCHX | Merrimac Chemical Co. -- Monsanto Chemical Co., Merrimac Division | Apr-38 | | NRHS |
| 1421 | MCHX | Monsanto Chemical Co., Merrimac Division | 1/52; eliminated 4/54 | | NRHS |
| 1422 | MCHX | Monsanto Chemical Co., Everett Plant | added 4/54; eliminated 7/55 | | NRHS |
| 1423 | MCHX | PLM Railcar Maintenance Co. | added 4/85; eliminated 10/89 | | NRHS |
| 1424 | MCHX | Railcar Maintenance Co. | added 10/89; eliminated 4/90 | | NRHS |
| 1425 | MCHX | Transcisco Rail Services Co. | added 4/90; eliminated 1/91 | | NRHS |
| 1426 | MCHX | Transcisco Leasing Co. | added 1/91; 1/94; eliminated 7/97 | | NRHS |
| 1427 | MCHX | Trinity Rail Management, Inc. | added 7/97; 7/2000 | | NRHS |
| 1428 | MCHX | *MONSANTO CHEMICAL CO., MERRIMAC CHEMICAL CO. DIV. | | | PWRC |
| 1429 | MCHX | +TRINITY RAIL MANAGEMENT INC. [TRANSCISCO LEASING COMPANY; PLM RAILCAR MAINTENANCE CO.] | | | PWRC |
| 1430 | MCHX | Monsanto Chemical Co. (Trinity Rail Management) | | | RSRV |
| 1431 | MCHX | TRINITY RAIL | | | SCAC4 |
| 1432 | MCHX | Transcisco Rail Services Co. | | USA | TRAFFIC |
| 1433 | MCHY | MCCLURE, H B COMPANY INC | | | SCAC4 |
| 1434 | MCHZ | MERCKENS CHOCOLATE | | | PWRC |
| 1435 | MCI | Maya Carga Internacional, S.A. de C.V. | Callsign: Mayacarga, | MEX | AVCODES |
| 1436 | MCI | Morocco Airways | Callsign: Morocco-Airways, | MA | AVCODES |
| 1437 | MCI | MCI | | USA | TRAFFIC |
| 1438 | MCIC | MAX CARGO INC | | | SCAC4 |
| 1439 | MCIE | MCINNIS ANTIQUES | | | SCAC4 |
| 1440 | MCIF | M C INTL TRANSPORTATION INC | | | SCAC4 |
| 1441 | MCIH | MCMICHAEL, R TRUCKING | | | SCAC4 |
| 1442 | MCIJ | MCI EXPRESS | | | SCAC4 |
| 1443 | MCIL | MALCOLM INTERNATIONAL | | | SCAC4 |
| 1444 | MCIN | MACHINERY SERVICES CORPORATION | | | SCAC4 |
| 1445 | MCIO | MACIOCIA, MARIO & FILS | | | SCAC4 |
| 1446 | MCIP | MCINTOSH, JAMES C | | | SCAC4 |
| 1447 | MCIS | MACINTYRE SERVICES LLC | | | SCAC4 |
| 1448 | MCIU | MAERSK CONTAINER INDUSTRY AS | | DK | BIC |
| 1449 | MCIU | MAERSK CONTAINER INDUSTRY AS | | | SCAC4 |
| 1450 | MCIV | MCLANE LIVESTOCK TRANSPORT INC | | | SCAC4 |
| 1451 | MCIX | SSI Mobley Co., Inc. (MofW cars) | 1/1994-7/2000 (not listed) | | NAKINA |
| 1452 | MCIX | SSI Mobley Co., Inc. | added 4/1989; eliminated 10/1989 | | NAKINA |
| 1453 | MCIX | Applied Chemicals Division, Mobley Co., Inc. | 1/1980 | | NAKINA |
| 1454 | MCIX | Mooney Chemicals, Inc. | added 1/1959; 4/1961; 7/1965 (not listed) | | NAKINA |
| 1455 | MCIX | Monteros & Co., Inc. | 7/1930 | | NAKINA |
| 1456 | MCIX | Mooney Chemicals, Inc. | added 1/59; 4/61-7/65 | | NRHS |
| 1457 | MCIX | Applied Chemicals Division, Mobley Co., Inc. | Jan-80 | | NRHS |
| 1458 | MCIX | SSI Mobley Co., Inc. | added 4/89; eliminated 10/89 | | NRHS |
| 1459 | MCIX | SSI Mobley Co., Inc. (MofW cars) | 1/94-7/2000 | | NRHS |
| 1460 | MCIX | *MONTEROS & CO., INC. | | | PWRC |
| 1461 | MCIX | *MOONEY CHEMICALS, INC. | | | PWRC |
| 1462 | MCIX | *SSI MOBLEY COMPANY, INC. (MOW CARS0 [MOBLEY COMPANY, INC., APPLIED CHEMICALS DIV.] | | | PWRC |
| 1463 | MCIX | Mobley Applied Chemicals Division | | | RSRV |
| 1464 | MCIZ | MIDWEST CARBIDE INC. | | | PWRC |
| 1465 | MCJ | Macair Jet S.A. | IATA: VM, Callsign: Jetmac, IATA Prefix: 194, Designator VM recalled by IATA. Founded in 1995. | RA | AVCODES |
| 1466 | MCJ | Macair Jet S.A. | IATA: IA, Callsign: Jetmac, IATA Prefix: 177, IATA designator changed to A0. Designator VM recalled by IATA. | RA | AVCODES |
| 1467 | MCJ | Macair Jet S.A. | IATA: A0, Callsign: Jetmac, IATA Prefix: 177, Name changed to Avian L�neas A�reas S.A. w.e.f. December 2016. IATA designator changed from IA, Designator VM recalled by IATA. | RA | AVCODES |
| 1468 | MCJ | Avian Líneas Aéreas S.A. t/a Avianca Argentina | IATA: A0, Callsign: Jetmac, IATA Prefix: 177, ICAO designator changed to ANC. ICAO callsign changed to Avian. Name changed from Macair Jet S.A. w.e.f. December 2016. | RA | AVCODES |
| 1469 | MCJ | Avian Líneas Aéreas S.A. t/a Avianca Argentina | Callsign: Jetmac, Name changed from Macair Jet S.A. w.e.f. December 2016. IATA designator changed from IA, Designator VM recalled by IATA. | RA | AVCODES |
| 1470 | MCJC | MARTIN, C J & SONS TRANSPORT LTD | | | SCAC4 |
| 1471 | MCJE | MILL CREEK MOTOR FREIGHT LP | | | SCAC4 |
| 1472 | MCJH | MOYNA, C J & SONS INC | | | SCAC4 |
| 1473 | MCJI | MCJ TRUCKING INC | | | SCAC4 |
| 1474 | MCJJ | MEDLEY CARRIER GROUP INC | | | SCAC4 |
| 1475 | MCJL | MCCALL, J LTD | | | SCAC4 |
| 1476 | MCJO | MORENO CONTRERAS, JORGE ALBERTO | | | SCAC4 |
| 1477 | MCJS | MTI CHARTER AND TOURS INC | | | SCAC4 |
| 1478 | MCJT | MCJ'S TRUCKING | | | SCAC4 |
| 1479 | MCJY | MCCLURE, JERRY TRUCKING INC | | | SCAC4 |
| 1480 | MCJZ | MC JUNKYARD | | | PWRC |
| 1481 | MCK | Macair Airlines | IATA: CC, IATA Prefix: 374, Founded in 1992. Ceased operations in 29 January 2009. | AUS | AVCODES |
| 1482 | MCK | aeroways GmbH | Callsign: Maverick, | D | AVCODES |
| 1483 | MCK | Macair Airlines | IATA: CC | | ICAO1 |
| 1484 | MCKB | MCKEE, BOBBY TRUCKING | | | SCAC4 |
| 1485 | MCKD | MCNAUGHTON, I D TRUCKING LIMITED | | | SCAC4 |
| 1486 | MCKE | MCKENZIE TANK LINES, INC | | | SCAC4 |
| 1487 | MCKH | MCKINLEY HATCHERY LTD | | | SCAC4 |
| 1488 | MCKK | MCKAY TRUCKING INC | | | SCAC4 |
| 1489 | MCKM | MCKIMM MILK TRANSIT INC | | | SCAC4 |
| 1490 | MCKN | MCKENZIE, RONALD B | | | SCAC4 |
| 1491 | MCKP | MERCER TRUCKING COMPANY INC | | | SCAC4 |
| 1492 | MCKQ | MCK SCHULIST EXPRESS LLC | | | SCAC4 |
| 1493 | MCKR | MCKEIL MARINE LIMITED | | | SCAC4 |
| 1494 | MCKS | MILLER, CLEM TRUCKING COMPANY | | | SCAC4 |
| 1495 | MCKT | McKINLAY TRANSPORT LIMITED | | | SCAC1 |
| 1496 | MCKU | MOUNTAIN CONTAINER TRADING INC | | USA | BIC |
| 1497 | MCKU | Mc Kinney Containers | | | RSRV |
| 1498 | MCKU | MC KNNEY CONTAINERS | | | SCAC4 |
| 1499 | MCKV | MICKELS TRUCKING COMPANY INC | | | SCAC4 |
| 1500 | MCKW | MCKAY BROS FARM IMPLEMENTS LTD | | | SCAC4 |
