| 2901 | MFCU | FINSTERWALDER CONTAINER GMBH | | D | BIC |
| 2902 | MFCV | MADEFERRETERA CASTOR SA DE CV | | | SCAC4 |
| 2903 | MFCW | MILLER, FRED CUSTOM WOODWORKS | | | SCAC4 |
| 2904 | MFCX | First Union Rail | added 10/1996; 7/2000-7/2005 | | NAKINA |
| 2905 | MFCX | USL Capital Rail Services | added 4/1994; eliminated 10/1996 | | NAKINA |
| 2906 | MFCX | U.S. Rail Services, Inc. | added 4/1993; 1/1994; eliminated 4/1994 | | NAKINA |
| 2907 | MFCX | Chrysler Rail Transportation Corp. | eliminated 4/1993 | | NAKINA |
| 2908 | MFCX | Farmers Coop Grain and Supply Co. | added 7/1980; eliminated 4/1989 | | NAKINA |
| 2909 | MFCX | Marfax Steel and Railway Equipment Co. | added 10/1967; 4/1970; eliminated 7/1970 | | NAKINA |
| 2910 | MFCX | Marfax Steel and Railway Equipment Co. | added 10/67; 4/70; eliminated 7/70 | | NRHS |
| 2911 | MFCX | Farmers Coop Grain and Supply Co. | added 7/80; eliminated 4/89 | | NRHS |
| 2912 | MFCX | Chrysler Rail Transportation Corp. | eliminated 4/93 | | NRHS |
| 2913 | MFCX | U.S. Rail Services, Inc. | added 4/93; 1/94; eliminated 4/94 | | NRHS |
| 2914 | MFCX | USL Capital Rail Services | added 4/94; eliminated 10/96 | | NRHS |
| 2915 | MFCX | First Union Rail | added 10/96; 7/2000 | | NRHS |
| 2916 | MFCX | *MARFAX STEEL & RAILWAY EQUIPMENT CO. | | | PWRC |
| 2917 | MFCX | *(RUSX) USL CAPITAL RAIL SERVICES [FARMERS CO-OP GRAIN & SUPPLY] | | | PWRC |
| 2918 | MFCX | +FIRST UNION RAIL {USL CAPITAL RAIL SERVICES; U.S. RAIL SERVICES, INC.; CHRYSLER RAIL TRANSPORTATION CORP.] | | | PWRC |
| 2919 | MFCX | Farmers Coop Grain and Supply (First Union Rail) | | | RSRV |
| 2920 | MFCY | MILICEVIC FREIGHT COMPANY | | | SCAC4 |
| 2921 | MFD | Monarch Air Group, LLC | Callsign: Freight Dog, | USA | AVCODES |
| 2922 | MFDC | MARSHFIELD DRAYAGE COMPANY | | | SCAC1 |
| 2923 | MFDO | MOFFAT, DENTON | | | SCAC4 |
| 2924 | MFDP | MCFARLAND TRUCKING | | | SCAC4 |
| 2925 | MFDQ | MF DRAKE TRANSPORT LLC | | | SCAC4 |
| 2926 | MFDS | MILLER, FDS CARTAGE | | | SCAC4 |
| 2927 | MFDW | MARITTIMA FLUVIALE DI NAVIGAZIONE S | | | SCAC4 |
| 2928 | MFEC | MAPLE LEAF CONSUMER FOODS INC | | | SCAC4 |
| 2929 | MFED | MILLSON FORESTRY SERVICES | | | SCAC4 |
| 2930 | MFEG | MCFEETERS, G ENTERPRISES INC | | | SCAC4 |
| 2931 | MFEM | MAYER FARM EQUIPMENT | | | SCAC4 |
| 2932 | MFEP | MAPLE FARM EQUIPMENT | | | SCAC4 |
| 2933 | MFEQ | MCGRAIL FARM EQUIPMENT LIMITED PART | | | SCAC4 |
| 2934 | MFER | MASTER TRANSFER CO INC | | | SCAC4 |
| 2935 | MFER | Materfer: Material Ferroviario S.A. | | RA | TRAFFIC |
| 2936 | MFERS | M. FERRICOS9, S.L. | | ES | VKM |
| 2937 | MFET | MAYER FARM EQUIPMENT INC | | | SCAC4 |
| 2938 | MFFA | MIAMI FOLIAGE FORWARDERS INC | | | SCAC4 |
| 2939 | MFFC | MIDWEST FRT FWDG CO INC | | | PWRC |
| 2940 | MFFE | Großherzoglich Mecklenburgische Friedrich Franz Eisenbahn | | D | TRAFFIC |
| 2941 | MFFF | MARTINS FAMILY FRUIT FARM LTD | | | SCAC4 |
| 2942 | MFFI | MOBILIA FRUIT FARMS INC | | | SCAC4 |
| 2943 | MFFO | MAYFAIR FUEL OIL CO | | | SCAC4 |
| 2944 | MFFS | MEYERS FLOWERS | | | SCAC4 |
| 2945 | MFFT | MOFFITT DODGE CHRYSLER LTD | | | SCAC4 |
| 2946 | MFFV | M.R.S. FREIGHT FORWARDING SERVICES, INC | | | SCAC1 |
| 2947 | MFFX | M4 Holdings Ltd. | added 4/1985; eliminated 1/1992; 1/1994-7/2005 (not listed) | | NAKINA |
| 2948 | MFFX | Midwestern Farm Fertilizers, Inc. | 4/1961 (not listed); added 1/1963; 7/1965; eliminated 10/1965 | | NAKINA |
| 2949 | MFFX | Midwestern Farm Fertilizers, Inc. | 4/61-7/65; eliminated 10/65 | | NRHS |
| 2950 | MFFX | M4 Holdings Ltd. | added 4/85; eliminated 1/92; 1/94-7/2000 | | NRHS |
| 2951 | MFFX | *MIDWESTERN FARM FERTILIZERS, INC. | | | PWRC |
| 2952 | MFFX | +M4 HOLDINGS LTD. | | | PWRC |
| 2953 | MFFX | M4 Holdings | | | RSRV |
| 2954 | MFG | Mid Africa Aviation | IATA: 8G, Callsign: Mid Africa, IATA Prefix: 357, | WAG | AVCODES |
| 2955 | MFG | Mid Africa Aviation Company Limited t/a Fly Mid Africa | IATA: 8G, Callsign: Mid Africa, IATA Prefix: 357, | WAG | AVCODES |
| 2956 | MFG | Mid Africa Aviation Company Limited t/a Fly Mid Africa | Callsign: Mid Africa, Designator 8G recalled by IATA | WAG | AVCODES |
| 2957 | MFGG | MOORE FOGGS CARGO SYSTEMS INC | | | SCAC4 |
| 2958 | MFGI | MONTANA FREIGHT SYSTEMS INC | | | SCAC4 |
| 2959 | MFGJ | METRO AIR FREIGHT INC | | | SCAC4 |
| 2960 | MFGL | METROFEST LOGISTICS LLC | | | SCAC4 |
| 2961 | MFGN | MAINFREIGHT INC | | | SCAC4 |
| 2962 | MFGP | MS FREIGHT COMPANY | | | SCAC4 |
| 2963 | MFGT | MAINFREIGHT INC | | | SCAC4 |
| 2964 | MFGW | MEGA DISPATCH INC | | | SCAC4 |
| 2965 | MFHF | MANSFIELD HELIFLIGHT INC | | | SCAC4 |
| 2966 | MFHN | MOTORCITY FREIGHT HAULERS INC | | | SCAC4 |
| 2967 | MFHT | MOMENTUM FREIGHT SERVICES INC | | | SCAC4 |
| 2968 | MFI | M.F.I | | FR | VKM |
| 2969 | MFIC | MIDDLEWEST FREIGHTWAYS | | | PWRC |
| 2970 | MFIC | MOUNTAIN FUELS INC | | | SCAC4 |
| 2971 | MFIG | MTI FORWARDING INC | | | SCAC4 |
| 2972 | MFIJ | METRO FREIGHT INTL INC | | | SCAC4 |
| 2973 | MFIK | MILANESIO FARMS INC | | | SCAC4 |
| 2974 | MFIM | MAINE FUELS INC | | | SCAC4 |
| 2975 | MFIN | MAINFREIGHT INC | | | SCAC4 |
| 2976 | MFIP | MOUNTAIN FUELS INC | | | SCAC4 |
| 2977 | MFIR | MASHA FREIGHT INC | | | SCAC4 |
| 2978 | MFIS | MITCHELL FARMS INC | | | SCAC4 |
| 2979 | MFIY | MICHAEL FARMS INC | | | SCAC4 |
| 2980 | MFJ | Solenta Aviation Mozambique | IATA: FW, Callsign: Seguro, | MOC | AVCODES |
| 2981 | MFJA | MARTINEZ FLORES, JAIME ALBERTO (MX- | | | SCAC4 |
| 2982 | MFKI | MORGANS FIRST CLASS TRUCKING INC | | | SCAC4 |
| 2983 | MFKX | MALAKOFF FUEL CO. (MALAKOFF, TEXAS 1926-1943) | | | PWRC |
| 2984 | MFL | Aero Mcfly, S.A. de C.V. | Callsign: Mcfly, | MEX | AVCODES |
| 2985 | MFL | Aero McFly | | | ICAO1 |
| 2986 | MFLA | MERCURY FREIGHT LINES INC | | | PWRC |
| 2987 | MFLC | MOORE FREIGHT LINES INC | | | SCAC4 |
| 2988 | MFLD | MAYFIELD TRANSFER CO INC | | | SCAC4 |
| 2989 | MFLE | MULTI REFLECTION SA PANAMA | | | SCAC4 |
| 2990 | MFLG | MCLAUGHLIN FREIGHT LINES INC | | | SCAC4 |
| 2991 | MFLH | MORSAN FARMS LTD | | | SCAC4 |
| 2992 | MFLI | MARATHON FREIGHT LINES CORP | | | SCAC4 |
| 2993 | MFLJ | MAGELLAN FREIGHT LINES LLC | | | SCAC4 |
| 2994 | MFLK | MIDWEST FREIGHTWAY LLC | | | SCAC4 |
| 2995 | MFLL | MOTONAVES FLORIDA LINES | | | PWRC |
| 2996 | MFLL | MODERN FORWARDING LLC | | | SCAC4 |
| 2997 | MFLM | MCBRYOTT FARMS LTD | | | SCAC4 |
| 2998 | MFLO | MOLLGAARD FLORAL | | | SCAC4 |
| 2999 | MFLR | MCFARLANE TRANSPORT LLC | | | SCAC4 |
| 3000 | MFLU | MEDECINS SANS FRONTIERES LOGISTIQUE | | F | BIC |
