| 6201 | MODE | MODESTI BROS INC | | | SCAC4 |
| 6202 | MODF | MOLINA TRANSPORTATION | | | SCAC4 |
| 6203 | MODH | MONTGOMERY OIL INC | | | SCAC4 |
| 6204 | MODJ | MODULEULTRA | | | SCAC4 |
| 6205 | MODK | MODE TRUCKING LLC | | | SCAC4 |
| 6206 | MODM | MORALES, D | | | SCAC4 |
| 6207 | MODN | MODELO TRANSPORT LLC | | | SCAC4 |
| 6208 | MODP | MOLD EXPRESS | | | SCAC4 |
| 6209 | MODR | MODAR TRANSPORT INC | | | SCAC4 |
| 6210 | MODS | MOLD-SPEC INC | | | SCAC4 |
| 6211 | MODT | MOSTAR DIRECTIONAL TECHNOLOGIES INC | | | SCAC4 |
| 6212 | MODU | MODUL LTD | | RUS | BIC |
| 6213 | MODU | MODUL LTD | | | SCAC4 |
| 6214 | MODV | MORSE, DAVID TRUCKING LLC | | | SCAC4 |
| 6215 | MODX | American Refrigerator Transit Co. | added 7/1955; 10/1957-1/1975; eliminated 7/1977 | | NAKINA |
| 6216 | MODX | American Refrigerator Transit Co. | added 7/55; 10/57-1/75; eliminated 7/77 | | NRHS |
| 6217 | MODX | AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 6218 | MODY | MOYER TRANSPORT INC | | | SCAC4 |
| 6219 | MOE | Mostarez Air | Callsign: Most Air, Ceased operations. | CZ | AVCODES |
| 6220 | MOEC | MOODIE, C & S FARMS INC | | | SCAC4 |
| 6221 | MOED | MOEDER OIL CO INC | | | SCAC4 |
| 6222 | MOEE | MOELLER TRUCKING INC | | | SCAC4 |
| 6223 | MOEI | MARCO ENTERPRISE INC | | | SCAC4 |
| 6224 | MOEJ | METRO OVERLAND EXPRESS INC | | | SCAC4 |
| 6225 | MOEK | MORRIS, EZEKIEL, TRANSPORTATION, INC | | | SCAC1 |
| 6226 | MOEK | MORRIS, EZEKIEL TRANSPORTATION INC | | | SCAC4 |
| 6227 | MOEKB | Moerser Kreisbahn | | D | TRAFFIC |
| 6228 | MOEN | MOE OIL CO | | | SCAC4 |
| 6229 | MOEP | METRO EAST SEABOARD TRANSPORTERS | | | SCAC4 |
| 6230 | MOERS | Moerser Straßenbahn | | D | TRAFFIC |
| 6231 | MOET | MOREY ENTERPRIESES INC | | | SCAC4 |
| 6232 | MOEU | MITSUI O.S.K. LINES LTD | | J | BIC |
| 6233 | MOEU | MITSUI O S K LINES LTD | | | SCAC4 |
| 6234 | MOEX | Morgan Engineering, Koehring Production System Division AMCA International Corp. | added 10/1981; eliminated 10/1984 | | NAKINA |
| 6235 | MOEX | Morgan Engineering, a Unit of the Equipment Systems Division, AMCA International Corp. | added 1/1976; 1/1980; eliminated 10/1981 | | NAKINA |
| 6236 | MOEX | Morgan Engineering Co. | added 7/1963; 7/1965-1/1975; eliminated 1/1976 | | NAKINA |
| 6237 | MOEX | Morgan Engineering Co. | added 7/63; 7/65-1/75 | | NRHS |
| 6238 | MOEX | Morgan Engineering, a Unit of the Equipment Systems Division, AMCA International Corp. | 1/80; eliminated 10/81 | | NRHS |
| 6239 | MOEX | Morgan Engineering, Koehring Production System Division AMCA International Corp. | added 10/81; eliminated 10/84 | | NRHS |
| 6240 | MOEX | MORGAN ENGINEERING | | | PWRC |
| 6241 | MOEX | Morgan Engineering | | | RSRV |
| 6242 | MOEX | MORGAN ENGINEERING CO THE | | | SCAC4 |
| 6243 | MOEZ | MITSUI OSK LINES LTD | | | SCAC4 |
| 6244 | MOF | Moaf Airways | IATA: MG, Callsign: Mike Golf, | IL | AVCODES |
| 6245 | MOF | MITSUI O.S.K. LINES, LTD. | | | PWRC |
| 6246 | MOFA | MORALESVILLE TRUCKING COMPANY | | | SCAC4 |
| 6247 | MOFD | MOFFITT TRANSPORTATION INC | | | SCAC4 |
| 6248 | MOFG | MARITIME-ONTARIO FREIGHT LINES LIMI | | | SCAC4 |
| 6249 | MOFI | MORIN FARMS INC | | | SCAC4 |
| 6250 | MOFK | MOF TRUCKING INC | | | SCAC4 |
| 6251 | MOFL | MOORE, F L & SONS INC | | | SCAC4 |
| 6252 | MOFR | MONFER France S.A. | | FR | VKM |
| 6253 | MOFT | MOUNTAIN FUR TRADER | | | SCAC4 |
| 6254 | MOFU | MITSUI O.S.K. LINES LTD | | J | BIC |
| 6255 | MOFU | MITSUI O S K LINES LTD | | | SCAC4 |
| 6256 | MOFV | MULLEN OILFIELD SERVICES LP | | | SCAC4 |
| 6257 | MOFW | MARITIME ONTARIO FREIGHTLINES LIMIT | | | SCAC4 |
| 6258 | MOFX | Maxton Oil & Fertilizer Co. | added 7/1965; 7/1965-1/1980; eliminated 1/1991; 1/1994-7/2000 (not listed) | | NAKINA |
| 6259 | MOFX | Maxton Oil & Fertilizer Co. | added 7/65; 7/65-1/80; eliminated 1/91; 1/94-7/2000 | | NRHS |
| 6260 | MOFX | MAXTON OIL & FERTILIZER COMPANY | | | PWRC |
| 6261 | MOFX | Maxton Oil and Fertilizer | | | RSRV |
| 6262 | MOFZ | MOHASCO FURNITURE | | | PWRC |
| 6263 | MOFZ | MITSUI OSK LINES LTD | | | SCAC4 |
| 6264 | MOG | Mogilevavia | Callsign: Mogilev, | BY | AVCODES |
| 6265 | MOG | Companhia Mogiana de Estradas de Ferro | | BR | TRAFFIC |
| 6266 | MOGA | MARCUM OIL & GAS COMPANY INC | | | SCAC4 |
| 6267 | MOGB | MALO, GILBERT INC | | | SCAC4 |
| 6268 | MOGC | MARLETTE OIL & GAS CO | | | SCAC4 |
| 6269 | MOGD | MONGANS INC | | | SCAC4 |
| 6270 | MOGF | MOGA TRANSFER | | | SCAC4 |
| 6271 | MOGL | MORGAN LEASING LLC | | | SCAC4 |
| 6272 | MOGM | MORGAN VAN LINES INC | | | SCAC4 |
| 6273 | MOGP | MARITIME-ONTARIO FREIGHT LINES LIMI | | | SCAC4 |
| 6274 | MOGT | MORGAN TRUCKING INC | | | SCAC4 |
| 6275 | MOGU | MITSUI O.S.K. LINES LTD | | J | BIC |
| 6276 | MOGU | MITSUI O S K LINES LTD | | | SCAC4 |
| 6277 | MOGV | MORGAN MOVING & STORAGE INC | | | SCAC4 |
| 6278 | MOGW | MARITIMA OCEANICA GRANELERA COMAGRA | | | SCAC4 |
| 6279 | MOGX | C.W. Brooks, Inc. | added 7/1993; 1/1994-7/2005 | | NAKINA |
| 6280 | MOGX | Mangum Oil & Gas Co. | added 4/1988; eliminated 7/1993 | | NAKINA |
| 6281 | MOGX | Mangum Oil & Gas Co. | added 4/88; eliminated 7/93 | | NRHS |
| 6282 | MOGX | C.W. Brooks, Inc. | added 7/93; 1/94-7/2000 | | NRHS |
| 6283 | MOGX | *MANGUM OIL & GAS COMPANY | | | PWRC |
| 6284 | MOGX | +C.W. BROOKS INCORPORATED | | | PWRC |
| 6285 | MOGX | Mangum Oil & Gas (C.W. Brooks) | | | RSRV |
| 6286 | MOGX | C W BROOKS INC | | | SCAC4 |
| 6287 | MOGY | MOTIONOLOGY INCORPORATED | | | SCAC4 |
| 6288 | MOH | Tigerfly | Callsign: Moth, | GB | AVCODES |
| 6289 | MOH | Tigerfly | | | ICAO1 |
| 6290 | MOH | MITSUI O.S.K. LINES, LTD. | | | PWRC |
| 6291 | MOH | Mobile & Ohio | | USA | TRAFFIC |
| 6292 | MOHA | MOHAWK LTD | | | SCAC4 |
| 6293 | MOHK | MOH TRUCKING LTD | | | SCAC4 |
| 6294 | MOHN | M-O COLDCHAIN | | | SCAC4 |
| 6295 | MOHT | MOORE HORSE TRANSPORT LTD | | | SCAC4 |
| 6296 | MOHU | MOTOR OIL (HELLAS) CORINTH REFINERI | | | SCAC4 |
| 6297 | MOHX | Solutia Inc. | added 1/1998; 7/2000; eliminated 1/2002; 7/2005 (not listed) | | NAKINA |
| 6298 | MOHX | Monsanto Co. | added 7/1964; 7/1965-1/1994; eliminated 1/1998 | | NAKINA |
| 6299 | MOHX | Monsanto Chemical Co. | added 1/1960; 4/1961; eliminated 7/1964 | | NAKINA |
| 6300 | MOHX | Monsanto Chemical Co. | added 1/60; 4/61; eliminated 7/64 | | NRHS |
