| 1 | MMX | Airmax S.A. | IATA: X8, Callsign: Perumax, IATA Prefix: 658, | PE | AVCODES |
| 2 | MMX | Airmax | | | ICAO1 |
| 3 | MMX | Monarch Molasses Co. | 1/1950-1/1952; eliminated 1/1953 | | NAKINA |
| 4 | MMX | Mosinee Paper Mills Co. | 4/1938-1/1943; 1/1945 (not listed) | | NAKINA |
| 5 | MMX | Mosinee Paper Mills Co. | Apr-38 | | NRHS |
| 6 | MMX | Monarch Molasses Co. | 1/52; eliminated 1/53 | | NRHS |
| 7 | MMX | *MOSINEE PAPER MILLS CO. | | | PWRC |
| 8 | MMX | *MONARCH MOLASSES CO. | | | PWRC |
| 9 | MMXB | METALES MEXICA | | | SCAC4 |
| 10 | MMXD | MOUNTAIN MARINE TRANSPORTATION LTD | | | SCAC4 |
| 11 | MMXG | MTM TRANSPORT LLC | | | SCAC4 |
| 12 | MMXL | MITEX MULTIMODAL EXPRESS LTD | | | SCAC4 |
| 13 | MMXM | MILLION MILE TRANSPORT | | | SCAC4 |
| 14 | MMXO | M & M TRANSPORT | | | SCAC4 |
| 15 | MMXP | MERCURY MOTOR EXPRESS INC | | | PWRC |
| 16 | MMXQ | M & M EXPRESS INC | | | SCAC4 |
| 17 | MMXT | M & M TRANSPORTATION LLC | | | SCAC4 |
| 18 | MMXV | MIDMOUNTA | | | SCAC4 |
| 19 | MMXY | MID-MO TRANSPORTATION LLC | | | SCAC4 |
| 20 | MMXZ | MURPHY MOTOR EXPRESS, INC | | | PWRC |
| 21 | MMXZ | Murphy Motor Express | | | RSRV |
| 22 | MMXZ | MURPHY MOTOR EXPRESS, INC | | | SCAC4 |
