| 5401 | MMKQ | MAD MIKES TRUCKING INC | | | SCAC4 |
| 5402 | MMKT | MARK TRANS INC | | | SCAC4 |
| 5403 | MMKX | Monarch Manufacturing Co. | 7/1923 | | NAKINA |
| 5404 | MMKX | Mona Motor Oil Co. | 7/1930-7/1932 | | NAKINA |
| 5405 | MMKX | *MONARCH MANUFACTURING CO. | | | PWRC |
| 5406 | MMKX | *MONA MOTOR OIL CO. | | | PWRC |
| 5407 | MML | Mongolian Airlines Group | IATA: MR, Callsign: Trans Mongolia, IATA Prefix: 861, Name changed to Hunnu Air | MGL | AVCODES |
| 5408 | MML | Manchester Metrolink | City: Manchester | GB | TRAFFIC |
| 5409 | MML | Midland Main Line | | UK | VKM |
| 5410 | MMLA | MICHIGAN METAL TRANSPORTERS INC | | | SCAC4 |
| 5411 | MMLB | M & M LOGISTICS | | | SCAC4 |
| 5412 | MMLC | UNITED STATES LINES, INC. | | | PWRC |
| 5413 | MMLC | UNITED STATES LINES, INC. | | | SCAC3 |
| 5414 | MMLD | MOLD-MASTERS (2007) LIMITED | | | SCAC4 |
| 5415 | MMLJ | MARITECH MARINE LTD | | | SCAC4 |
| 5416 | MMLL | MCMULLENS TRANSFER INC | | | SCAC4 |
| 5417 | MMLM | MIDA MARITIME LIMITED | | | SCAC4 |
| 5418 | MMLN | MOMETAL STRUCTURES INC | | | SCAC4 |
| 5419 | MMLP | MARC MEX LLC | | | SCAC4 |
| 5420 | MMLQ | MILLER, MICHELLE LLC | | | SCAC4 |
| 5421 | MMLS | MARTIN MOTOR LINES, INC | | | SCAC1 |
| 5422 | MMLU | CFL MULTIMODAL SA | | L | BIC |
| 5423 | MMLU | UNITED STATES LINES, INC. | | | SCAC3 |
| 5424 | MMLU | CFL MULTIMODAL SA | | | SCAC4 |
| 5425 | MMLV | MARCUS MOTORSPORTS LLC | | | SCAC4 |
| 5426 | MMLW | M & M LOGISTICS INCORPORATED | | | SCAC4 |
| 5427 | MMM | Meridian Air Company | Callsign: Aviameridian, | RUS | AVCODES |
| 5428 | MMM | MAM Aviation Ltd. | IATA: MF, Callsign: Mamair, Name changed to Marine and Aviation Management International | GB | AVCODES |
| 5429 | MMM | Marine and Aviation Management International | IATA: MF, Callsign: Mamair, Name changed from MAM Aviation Ltd. | GB | AVCODES |
| 5430 | MMM | Aviation Company Meridian | | | ICAO1 |
| 5431 | MMM | Myanmar Airways International | IATA: 8M | | ICAO1 |
| 5432 | MMMB | MID MARYLAND MACHINE INC | | | SCAC4 |
| 5433 | MMME | MARTHA MCLEAN MINIATURES | | | SCAC4 |
| 5434 | MMMG | MODION MARITIME MANAGEMENT SA | | | SCAC4 |
| 5435 | MMML | MARTINEZ MARIN, MA LORENA | | | SCAC4 |
| 5436 | MMMM | MARM | | | SCAC4 |
| 5437 | MMMO | MAMM | | | SCAC4 |
| 5438 | MMMP | METAL MANAGEMENT MISSISSIPPI INC | | | SCAC4 |
| 5439 | MMMQ | MARCUM & MARCUM TRUCKING LLC | | | SCAC4 |
| 5440 | MMMR | MARTINEZ MARTINEZ, MARIO | | | SCAC4 |
| 5441 | MMMT | TRIPLE M TRANSPORTATION | | | PWRC |
| 5442 | MMMT | MAMM | | | SCAC4 |
| 5443 | MMMU | MCCAUGHRIN MARITIME MARINE SYSTEMS INC. | | USA | BIC |
| 5444 | MMMU | FESCO PACIFIC LINES | | | PWRC |
| 5445 | MMMU | Fesco Pacific Lines | | | RSRV |
| 5446 | MMMU | V/O SOVINFOLT | | | SCAC3 |
| 5447 | MMMU | MACCA | | | SCAC4 |
| 5448 | MMMV | MID-MISS | | | SCAC4 |
| 5449 | MMMW | M & M MOTORWAYS INC | | | SCAC4 |
| 5450 | MMMX | Minnesota Mining & Manufacturing d/b/a 3M | 7/2000-7/2005 (not listed) | | NAKINA |
| 5451 | MMMX | Minnesota Mining & Manufacturing d/b/a 3M | Jul-00 | | NRHS |
| 5452 | MMMX | MINNESOTA MINING & MANUFACTURING CO. d/b/a 3M | | | PWRC |
| 5453 | MMMX | Minnesota Mining and Manufacturing (3M) | | | RSRV |
| 5454 | MMMX | MINNESOTA MINING & MANUFACTURING | | | SCAC4 |
| 5455 | MMN | Pro Airways, LLC | Callsign: Minuteman, | USA | AVCODES |
| 5456 | MMNA | MARKLEY MOVING & STORAGE | | | SCAC4 |
| 5457 | MMNC | MULTIMETCO INC | | | SCAC4 |
| 5458 | MMNF | MISTY MOUNTAIN FARM | | | SCAC4 |
| 5459 | MMNG | MCCARLEY MOVING & STORAGE COMPANY I | | | SCAC4 |
| 5460 | MMNI | MCELROY MANUFACTURING INC | | | SCAC4 |
| 5461 | MMNP | M & M TRANSPORTATION INC | | | SCAC4 |
| 5462 | MMNR | MARTINEZ MONTEMAYOR, RICARDO CESAR | | | SCAC4 |
| 5463 | MMNS | M & M CONTAINER TRANSPORT LLC | | | SCAC4 |
| 5464 | MMNT | MCMILLAN TRUCKING | | | SCAC4 |
| 5465 | MMNU | MOBILE MINI UK LIMITED | | GB | BIC |
| 5466 | MMNU | MOBILE MINI BV | | | SCAC4 |
| 5467 | MMNV | MARINE MANAGEME | | | SCAC4 |
| 5468 | MMNW | METRO METALS NORTHWEST INC | | | SCAC4 |
| 5469 | MMO | Malta Air Travel Ltd d/b/a Malta MedAir | IATA: MM, Callsign: Malit, IATA designator changed to MT. | M | AVCODES |
| 5470 | MMO | Malta Air Travel Ltd d/b/a Malta MedAir | IATA: MT, Callsign: Malit, IATA Prefix: 323, IATA designator changed from MM*. | M | AVCODES |
| 5471 | MMOA | MODERN MATA ORTIZ | | | SCAC4 |
| 5472 | MMOD | MATHESON MOTORSPORTS | | | SCAC4 |
| 5473 | MMOE | MALARK MOTOR EXPRESS INC | | | SCAC4 |
| 5474 | MMOF | MERCHANTS MOTOR FREIGHT, INC | | | SCAC1 |
| 5475 | MMOF | MERCHANTS MOTOR FREIGHT INC | | | SCAC4 |
| 5476 | MMOI | MILTONS MOBILE MAINTENANCE LTD | | | SCAC4 |
| 5477 | MMOJ | MIMS OIL COMPANY INC | | | SCAC4 |
| 5478 | MMOK | MILES MOOK PRODUCTIONS INC | | | SCAC4 |
| 5479 | MMOL | MENARD, MANNING OIL CO INC | | | SCAC4 |
| 5480 | MMOM | MORSE MOVING & STORAGE INC | | | SCAC4 |
| 5481 | MMOO | MARMAC OIL CO NORTH GA LUBRICANTS | | | SCAC4 |
| 5482 | MMOP | MARTIN OPERATING PARTNERSHIP LP (MA | | | SCAC4 |
| 5483 | MMOQ | MAMA MUNDO INC | | | SCAC4 |
| 5484 | MMOT | MAMO TRANSPORTATION INC | | | SCAC4 |
| 5485 | MMOY | MERAM | | | SCAC4 |
| 5486 | MMP | AMP Incorporated | Callsign: Amp-Inc, | USA | AVCODES |
| 5487 | MMP | AMP Incorporated | | | ICAO1 |
| 5488 | MMPA | MURPHY | | | SCAC4 |
| 5489 | MMPD | MOUNTAIN MAPLE PRODUCTS INC | | | SCAC4 |
| 5490 | MMPI | MACMILLAN-PIP | | | SCAC4 |
| 5491 | MMPL | MARIMP | | | SCAC4 |
| 5492 | MMPO | M & M TRUCK LINES INC | | | SCAC4 |
| 5493 | MMPP | METAL MONKEY PRODUCTIONS INC | | | SCAC4 |
| 5494 | MMPS | M & M TRANSPORT | | | SCAC4 |
| 5495 | MMQC | MESA MOTORS INC | | | SCAC4 |
| 5496 | MMQG | MMT LOGISTICS LLC | | | SCAC4 |
| 5497 | MMQI | MMS LOGISTICS INC | | | SCAC4 |
| 5498 | MMQO | M M S INC | | | SCAC4 |
| 5499 | MMQP | M & M TRANSPORT SERVICES INC | | | SCAC4 |
| 5500 | MMQR | MULTIMODAL ESQUER INC | | | SCAC4 |
