| 1 | MMA | Metro Manila Airways International, Inc. | | RP | AVCODES |
| 2 | MMA | Myanmar Airways International Company Ltd. | IATA: 8M, Callsign: Myanmar, IATA Prefix: 599, | MYA | AVCODES |
| 3 | MMA | Mondair | Callsign: Mondair, | MA | AVCODES |
| 4 | MMA | Montreal, Maine and Atlantic Ry. Ltd. | added 4/2003; 7/2005 | | NAKINA |
| 5 | MMA | MONTREAL, MAINE & ATLANTIC RAILWAY | | | PWRC |
| 6 | MMA | Montreal, Maine and Atlantic Railway | | | RSRV |
| 7 | MMA | MONTREAL MAINE AND ATLANTIC RAILWAY | | | SCAC4 |
| 8 | MMA | Montreal, Maine & Atlantic Railway Company | | CDN | TRAFFIC |
| 9 | MMAC | MONTREAL, MAINE & ATLANTIC RAILWAY | | | PWRC |
| 10 | MMAC | Montreal, Maine and Atlantic Railway | | | RSRV |
| 11 | MMAE | M & M TRANSPORTATION | | | SCAC4 |
| 12 | MMAF | MSR MOBILE STAGE RENTALS LLC | | | SCAC4 |
| 13 | MMAG | MCAULIFFE MARITIME AGENCY INC | | | SCAC4 |
| 14 | MMAI | MJ PETROLEUM | | | SCAC4 |
| 15 | MMAJ | MOSMATIC CORPORATION | | | SCAC4 |
| 16 | MMAM | MILLENIUM MARINE | | | SCAC4 |
| 17 | MMAP | M & M TRANSPORT INC | | | SCAC4 |
| 18 | MMAU | MAERSK A/S | | DK | BIC |
| 19 | MMAU | AP MOLLER | | | SCAC4 |
| 20 | MMAV | MORALES MOVING & STORAGE CO INC | | | SCAC4 |
| 21 | MMAW | MOOMAW | | | SCAC4 |
| 22 | MMAX | Martin Marietta Materials, Inc. | added 7/2007 | | NAKINA |
| 23 | MMAX | Martin Marietta Corp. | added 4/1985; 1/1994; eliminated 7/1997; 7/2000-7/2005 (not listed) | | NAKINA |
| 24 | MMAX | Martin Marietta Aluminum Inc. | added 7/1982; eliminated 1/1985 | | NAKINA |
| 25 | MMAX | Defense Plant Corp. | 1/1945-1/1946 | | NAKINA |
| 26 | MMAX | Martin Marietta Aluminum Inc. | added 7/82; eliminated 1/85 | | NRHS |
| 27 | MMAX | Martin Marietta Corp. | added 4/85; 1/94; eliminated 7/97; 7/2000 | | NRHS |
| 28 | MMAX | *DEFENSE PLANT CORP. | | | PWRC |
| 29 | MMAX | +MARTIN MARIETTA MATERIALS, INC. [MARTIN MARIETTA ALUMINUM, INC.] | | | PWRC |
| 30 | MMAX | Martin Marietta Aluminum | | | RSRV |
| 31 | MMAX | MARTIN MARIETTA MATERIALS INC | | | SCAC4 |
| 32 | MMAZ | MARTIN MARIETTA AGREGATES, INC. | | | PWRC |