| 5901 | MNNO | MINNESOTA EXPRESS, INC | | | SCAC1 |
| 5902 | MNNP | MONNIER EXPRESS INC | | | SCAC4 |
| 5903 | MNNR | Minnesota Commercial Ry. Co. | added 4/1987; 1/1994-7/2005 | | NAKINA |
| 5904 | MNNR | Minnesota Commercial Ry. Co. | added 4/87; 1/94-7/2000 | | NRHS |
| 5905 | MNNR | MINNESOTA COMMERCIAL RAILWAY CO. | | | PWRC |
| 5906 | MNNR | Minnesota Commercial Railway | | | RSRV |
| 5907 | MNNR | MINNESOTA COMMERCIAL RAILWAY CO | | | SCAC4 |
| 5908 | MNNR | Minnesota Commercial Railway | | USA | TRAFFIC |
| 5909 | MNNS | MANNES, BERT TRUCKING INC | | | SCAC4 |
| 5910 | MNNY | MILLENNIUM TRUCKING INC | | | SCAC4 |
| 5911 | MNO | Transportes Aereos Mangino, S.A. de C.V. | Callsign: Mangino, | MEX | AVCODES |
| 5912 | MNO | Tulca (Pty) Ltd. t/a Mango | IATA: JE, Callsign: Tulca, Name changed to Mango (Pty) Ltd. Designator JE reinstated by IATA. | ZA | AVCODES |
| 5913 | MNO | Mango (Pty) Ltd. | IATA: JE, Callsign: Tulca, Name changed to Mango Airlines (SOC) Ltd. t/a Mango. Name changed from Tulca (Pty) Ltd. t/a Mango. Designator JE reinstated by IATA. | ZA | AVCODES |
| 5914 | MNO | Mango Airlines (SOC) Ltd. t/a Mango | IATA: JE, Callsign: Tulca, Name changed from Mango (Pty) Ltd. And previously Tulca (Pty) Ltd. t/a Mango. Designator JE reinstated by IATA. | ZA | AVCODES |
| 5915 | MNO | Mango | IATA: JE | | ICAO1 |
| 5916 | MNOE | MCKEE, NORMA | | | SCAC4 |
| 5917 | MNOG | MAST, NEAL & SON GREENHOUSES INC | | | SCAC4 |
| 5918 | MNOH | MONARCH OIL CO INC | | | SCAC4 |
| 5919 | MNOJ | MORENO, JUAN | | | SCAC4 |
| 5920 | MNOL | MONTERO, NOEL | | | SCAC4 |
| 5921 | MNON | MIDDLETON OIL CO INC | | | SCAC4 |
| 5922 | MNOP | NELSON, MARC OIL PRODUCTS INC | | | SCAC4 |
| 5923 | MNOS | MONIET, EDUARDO S | | | SCAC4 |
| 5924 | MNOS | MÁV Nosztalgia Kft | | H | TRAFFIC |
| 5925 | MNOS | MÁV Nosztalgia Kft. | | HU | VKM |
| 5926 | MNOU | MAINCO | | F | BIC |
| 5927 | MNOU | MAINCO | | | SCAC4 |
| 5928 | MNOW | MORGANS OUTLAW | | | SCAC4 |
| 5929 | MNOY | MARTIN OIL COMPANY | | | SCAC4 |
| 5930 | MNP | Spirit of Manila Airlines Corp | IATA: SM, Callsign: Manila Sky, IATA Prefix: 976, | RP | AVCODES |
| 5931 | MNPC | MANNPOWER INC | | | SCAC4 |
| 5932 | MNPE | MINNESOTA PRODUCE INC | | | SCAC4 |
| 5933 | MNPG | M N P TRANSPORT | | | SCAC4 |
| 5934 | MNPN | MACDONALD, STEPHEN | | | SCAC4 |
| 5935 | MNPO | MANTEIS TRANSPORT LTD | | | SCAC4 |
| 5936 | MNPQ | MAINE COAST PETROLEUM INC | | | SCAC4 |
| 5937 | MNPS | MCNEIL PORTRAITS | | | SCAC4 |
| 5938 | MNPT | MOON ENTERPRISES INC | | | SCAC4 |
| 5939 | MNPW | MALCOLM NAVIGATION PTE LTD | | | SCAC4 |
| 5940 | MNPX | Morton International, Inc. | added 4/1997; 7/2000; eliminated 7/2003 | | NAKINA |
| 5941 | MNPX | Morton Salt-Division of Morton Thiokol, Inc. | added 4/1987; 1/1994; eliminated 4/1997 | | NAKINA |
| 5942 | MNPX | Morton Salt-Division of Morton Norwich Products, Inc. | added 10/1981; eliminated 4/1987 | | NAKINA |
| 5943 | MNPX | Morton Salt-Division Norwich Products, Inc. | added 7/1981; eliminated 10/1981 | | NAKINA |
| 5944 | MNPX | Morton Salt Co. | added 7/1980; eliminated 7/1981 | | NAKINA |
| 5945 | MNPX | Morton Salt Co. | added 7/80; eliminated 7/81 | | NRHS |
| 5946 | MNPX | Morton Salt-Division Norwich Products, Inc. | added 7/81; eliminated 10/81 | | NRHS |
| 5947 | MNPX | Morton Salt-Division of Morton Norwich Products, Inc. | added 10/81; eliminated 4/87 | | NRHS |
| 5948 | MNPX | Morton Salt-Division of Morton Thiokol, Inc. | added 4/87; 1/94; eliminated 4/97 | | NRHS |
| 5949 | MNPX | Morton International, Inc. | added 4/97; 7/2000 | | NRHS |
| 5950 | MNPX | MORTON INTERNATIONAL, INC. [MORTON SALT-DIV MORTON NORWICH PROD.INC.] | | | PWRC |
| 5951 | MNPX | Morton Norwich Products (Morton International) | | | RSRV |
| 5952 | MNPY | MN TRANSPORTES | | | SCAC4 |
| 5953 | MNQF | MONTAGUE FARMS INC | | | SCAC4 |
| 5954 | MNQT | MANNING TRANSPORT INC | | | SCAC4 |
| 5955 | MNR | Monair Executive SA | Callsign: Monair, | CH | AVCODES |
| 5956 | MNR | Monara Air (Pvt) Ltd. | Callsign: Monara Air, | CL | AVCODES |
| 5957 | MNR | Mann Air Ltd. t/a Mann Air Charter | Callsign: Teemol, | GB | AVCODES |
| 5958 | MNR | Mann Air | | | ICAO1 |
| 5959 | MNR | Burlington Northern Inc. | added 10/1975; 1/1980; eliminated 4/1981 | | NAKINA |
| 5960 | MNR | Burlington Northern Inc. | 1/80; eliminated 4/81 | | NRHS |
| 5961 | MNR | BURLINGTON NORTHERN INC. [MICHIGAN NORTHERN RAILROAD] | | | PWRC |
| 5962 | MNR | MAINE NORTHERN RAILWAY COMPANY | | | SCAC4 |
| 5963 | MNRB | MACON, ROBERT L | | | SCAC4 |
| 5964 | MNRC | MANN, R TRUCKING LTD | | | SCAC4 |
| 5965 | MNRE | M & N TRANSPORTATION SERVICES INC | | | SCAC4 |
| 5966 | MNRF | M & R EXPRESS INC | | | SCAC4 |
| 5967 | MNRM | MINERAL TRASNPORT SERVICE INC | | | SCAC4 |
| 5968 | MNRN | MONITOR TRANSPORTATION SERVICES INC | | | SCAC4 |
| 5969 | MNRQ | M N R TRUCKING INC | | | SCAC4 |
| 5970 | MNRR | MODOC NORTHERN RAILROAD CO. | | | PWRC |
| 5971 | MNRR | MODOC NORTHERN RAILROAD COMPANY | | | SCAC4 |
| 5972 | MNRR | Modoc Northern Railroad Co. | | USA | TRAFFIC |
| 5973 | MNRU | RAME RUBIS ASPHALT MIDDLE EAST DMCC | | UAE | BIC |
| 5974 | MNRV | MACLEAN, R FORESTRY LTD | | | SCAC4 |
| 5975 | MNRX | METROPOLITAN COUNCIL | | | PWRC |
| 5976 | MNRX | Northstar Line | | | RSRV |
| 5977 | MNRX | METROPOLITAN COUNCIL | | | SCAC4 |
| 5978 | MNRY | MASONRY STOVE BUILDERS | | | SCAC4 |
| 5979 | MNS | Ministic Air | Callsign: Ministic, | CDN | AVCODES |
| 5980 | MNS | Manunggal Air Service, PT. | Callsign: Manunggal, | RI | AVCODES |
| 5981 | MNS | Medsky Airways | Callsign: Medsky, | LAR | AVCODES |
| 5982 | MNS | Ministic Air | | | ICAO1 |
| 5983 | MNS | Soo Line R.R. Co. | 1/1994-7/2005 | | NAKINA |
| 5984 | MNS | Minneapolis, Northfield and Southern Ry., Inc. | added 4/1980; eliminated 4/1986 | | NAKINA |
| 5985 | MNS | Minneapolis, Northfield and Southern Ry. | 1/1952-10/1966 & 1/1975-1/1980; eliminated 4/1980 | | NAKINA |
| 5986 | MNS | Minneapolis, Northfield and Southern Ry. | 1/52-10/66 & 1/75-1/80; eliminated 4/80 | | NRHS |
| 5987 | MNS | Minneapolis, Northfield and Southern Ry., Inc. | added 4/80; eliminated 4/86 | | NRHS |
| 5988 | MNS | Soo Line R.R. Co. | 1/94-7/2000 | | NRHS |
| 5989 | MNS | CANADIAN PACIFIC RAILWAY [SOO LINE RAILROAD; MINNEAPOLIS, NORTHFIELD & SOUTHERN RY] | | | PWRC |
| 5990 | MNS | Minneapolis, Northfield and Southern Railway (Canadian Pacific Railway) | | | RSRV |
| 5991 | MNS | MIDNIGHT SUN TOURS INC | | | SCAC4 |
| 5992 | MNS | Minneapolis, Northfield & Southern | | USA | TRAFFIC |
| 5993 | MNSA | M & S CARTAGE INC | | | SCAC4 |
| 5994 | MNSB | MONTESA EXPRESS INC | | | SCAC4 |
| 5995 | MNSC | MAGNESPEC INC | | | SCAC4 |
| 5996 | MNSD | MANLEY, STEVEN TIRE SALES | | | SCAC4 |
| 5997 | MNSE | M & S EXPRESS INC | | | SCAC4 |
| 5998 | MNSK | MOUNTAIN STATES TRANSPORT LLC | | | SCAC4 |
| 5999 | MNSL | MINN-ALASKA TRANSPORT | | | SCAC4 |
| 6000 | MNSM | MANTIS SPORT | | | SCAC4 |
