| 1 | MSL | Aircompany Mals Ltd. | | RUS | AVCODES |
| 2 | MSL | Marsland Aviation | IATA: M7, Callsign: Marslandair, Ceased operations during 2013. | SUD | AVCODES |
| 3 | MSL | Marsland Aviation | IATA: M7 | | ICAO1 |
| 4 | MSL | MONTGOMERY SHORT LINE LLC | | | PWRC |
| 5 | MSL | Montgomery Short Line | | | RSRV |
| 6 | MSL | MONTGOMERY SHORT LINE LLC | | | SCAC4 |
| 7 | MSLA | MOUNTAIN STATES L P GAS COMPANY | | | SCAC4 |
| 8 | MSLB | METRO SHIPPING LIMITED | | | SCAC4 |
| 9 | MSLC | Minnesota Short Lines Co. | 1/1980 | | NAKINA |
| 10 | MSLC | Minnesota Short Lines Co. | Jan-80 | | NRHS |
| 11 | MSLC | MINNESOTA SHORT LINES CO. | | | PWRC |
| 12 | MSLC | Minnesota Short Lines | | | RSRV |
| 13 | MSLC | MULTISEAL CORPORATION | | | SCAC4 |
| 14 | MSLD | MID SOUTHLAND DEVELOPMENTS CORP | | | SCAC4 |
| 15 | MSLE | MCSHERRY LIVESTOCK LTD | | | SCAC4 |
| 16 | MSLH | MARTINEZ SALEH, ARMANDO YUSSEF | | | SCAC4 |
| 17 | MSLI | MSL EXPRESS INC | | | SCAC4 |
| 18 | MSLJ | M & S LOGISTICS INC | | | SCAC4 |
| 19 | MSLK | M & S LOGISTICS | | | SCAC4 |
| 20 | MSLM | MILLER & SONS TRUCKING INC | | | SCAC4 |
| 21 | MSLN | MERIDIAN SHIPPING LINE | | | SCAC1 |
| 22 | MSLO | MINSTAR LOGISTICS LLC | | | SCAC4 |
| 23 | MSLP | M S TRANSPORTATION LLC | | | SCAC4 |
| 24 | MSLQ | MARSHALL TRUCKING | | | SCAC4 |
| 25 | MSLR | MUSCLE RELOCATION INC | | | SCAC4 |
| 26 | MSLS | MASTER LINE | | | SCAC4 |
| 27 | MSLT | M-S LOGISTICS LLC | | | SCAC4 |
| 28 | MSLU | MINSHENG SHIPPING CO.,LTD. | | PRC | BIC |
| 29 | MSLV | MESILLA VALLEY TRANSPORTATION | | | SCAC4 |
| 30 | MSLX | Marsulex, Inc. | added 1/2008 | | NAKINA |
| 31 | MSLX | MARSULEX INC. | | | PWRC |
| 32 | MSLX | MARSULEX INC | | | SCAC4 |
| 33 | MSLY | MOUNTAIN STATES L P GAS COMPANY | | | SCAC4 |
| 34 | MSLZ | MISSISSIPPI LINE | | | PWRC |
