| 1 | MUS | Air Adelphi Ltd. | Callsign: Adelphi, | WV | AVCODES |
| 2 | MUS | | | CZ | TRAFFIC |
| 3 | MUS | Mostecká uhelná a.s. | | CZ | VKM |
| 4 | MUSAK | Musashino Kotsu Bus Co. | | J | TRAFFIC |
| 5 | MUSC | Memphis Union Station Co. | 1/1975-7/2005 | | NAKINA |
| 6 | MUSC | Memphis Union Station Co. | 1/75-7/2000 | | NRHS |
| 7 | MUSC | MEMPHIS UNION STATION CO. | | | PWRC |
| 8 | MUSC | Memphis Union Station | | | RSRV |
| 9 | MUSD | MUR SHIPPING LIMITED | | | SCAC4 |
| 10 | MUSE | MOOSABEC MUSSELS INC | | | SCAC4 |
| 11 | MUSF | MUELLER SEED FARM | | | SCAC4 |
| 12 | MUSG | MUSGROVE TRUCKING INC | | | SCAC4 |
| 13 | MUSH | MUSHROOM EXPRESS COMPANY | | | SCAC4 |
| 14 | MUSI | MUSIC CITY LOGISTICS INC | | | SCAC4 |
| 15 | MUSL | MUSSER SUPPLY INC | | | SCAC4 |
| 16 | MUSN | MUSTANG TRANSPORT | | | SCAC4 |
| 17 | MUSP | MULTI-SERV TRANSPORTATION | | | SCAC4 |
| 18 | MUSS | MUSSELL CRANE MFG | | | SCAC4 |
| 19 | MUST | MAUST TRANSFER | | | SCAC1 |
| 20 | MUSU | MULTITRADE CONTAINER SERVICES LTD | | | SCAC4 |
| 21 | MUSX | Musher & Co., Inc. | 8/1920 | | NAKINA |
| 22 | MUSX | MUSHER & CO., INC. | | | PWRC |
| 23 | MUSY | MURPHY | | | SCAC4 |
