| 1 | MSD | Atlantic Coast Aircraft Services, Inc. | Callsign: Moosehead, Established in 1997. ICAO designator changed to BKS. ICAO callsign changed to Berks. | USA | AVCODES |
| 2 | MSDB | MOLINEX SA DE CV | | | SCAC4 |
| 3 | MSDC | MOTO SPORT DU CUIVRE INC | | | SCAC4 |
| 4 | MSDF | MID-ISLAND FUEL | | | SCAC4 |
| 5 | MSDG | MASIL REFRIGERATED TRANSPORTATION L | | | SCAC4 |
| 6 | MSDM | MANNETTE STEEL DRUM LTD | | | SCAC4 |
| 7 | MSDQ | MARTINS, MEL TRANSFER LTD | | | SCAC4 |
| 8 | MSDR | Knoxville & Holston River R.R. Co., Inc. | added 1/2003; 7/2005 | | NAKINA |
| 9 | MSDR | Mississippi Delta R.R. | added 4/1986; 1/1994-7/2000; eliminated 1/2003 | | NAKINA |
| 10 | MSDR | Mississippi Delta R.R. | added 4/86; 1/94-7/2000 | | NRHS |
| 11 | MSDR | KNOXVILLE & HOLSTON RIVER RAILROAD CO. [MISSISSIPPI DELTA RAILROAD] | | | PWRC |
| 12 | MSDR | Mississippi Delta Railroad | | | RSRV |
| 13 | MSDT | MUNSEN, MEL | | | SCAC4 |
| 14 | MSDU | MSC- MEDITERRANEAN SHIPPING COMPANY S.A. | | CH | BIC |
| 15 | MSDU | SOCIETE CHIMIQUE MERCK | | | SCAC4 |
| 16 | MSDV | MORRISTOWN DRIVERS SERVICE INC | | | SCAC4 |
| 17 | MSDW | MID STATE CARTAGE INC | | | SCAC4 |
| 18 | MSDY | MSD SERVICES INC | | | SCAC4 |
