| 1 | USM | Air Mobility Command | IATA: MC, | USA | AVCODES |
| 2 | USMB | USMC TRANSPORT LLC | | | SCAC4 |
| 3 | USMC | USMS LOGISTICS LLC | | | SCAC4 |
| 4 | USMC | United States Marine Corps | | USA | TRAFFIC |
| 5 | USMG | USM LOGISTICS | | | SCAC4 |
| 6 | USML | UNIVAN SHIP MANAGEMENT LIMITED | | | SCAC4 |
| 7 | USMM | USA TRUCK INC (INTERMODAL | | | SCAC4 |
| 8 | USMN | U. S. STEEL MINING RAILROAD | | | PWRC |
| 9 | USMN | U-SHIP MARITIME SERVICES INC | | | SCAC4 |
| 10 | USMR | UNITED STATES METALS REFINING | | | PWRC |
| 11 | USMS | UNIVERSA | | | SCAC4 |
| 12 | USMU | UNITED STATES MARINE CORPS | | USA | BIC |
| 13 | USMU | U.S. DEPARTMENT OF DEFENSE - MARINE CORPS | | | PWRC |
| 14 | USMU | US Department of Defense Marine Corps | | | RSRV |
| 15 | USMU | U S DEPARTMENT OF DEFENSE-MARINE CO | | | SCAC4 |
| 16 | USMV | USACAN MEDIA DIST SRV CORP | | | SCAC4 |
| 17 | USMX | U.S. Steel Mining Co., Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 18 | USMX | U.S. Steel Mining Co., Inc. | Jul-00 | | NRHS |
| 19 | USMX | U.S. STEEL MINING COMPANY, INC. | | | PWRC |
| 20 | USMX | US Steel Mining | | | RSRV |
| 21 | USMZ | U.S. DEPARTMENT OF DEFENSE - MARINE CORPS | | | PWRC |
