| 1 | MSR | Egyptair | IATA: MS, Callsign: Egyptair, IATA Prefix: 077, Name changed from United Arab Airlines (UAA). ICAO designator changed form EGY | ET | AVCODES |
| 2 | MSR | Egyptair | IATA: MS | | ICAO1 |
| 3 | MSR | Mississippi Southern R.R. | 7/2005; added 4/2008 | | NAKINA |
| 4 | MSR | *MICHIGAN SHORE RAILROAD | | | PWRC |
| 5 | MSR | +MISSISSIPPI SOUTHERN RAILROAD | | | PWRC |
| 6 | MSR | Mississippi Southern Railroad (Watco) | | | RSRV |
| 7 | MSR | MISSISSIPPI SOUTHERN RAILROAD | | | SCAC4 |
| 8 | MSR | Egyptair | | ET | TRAFFIC |
| 9 | MSRB | MAINES COLLISION REPAIR & BODY SHOP | | | SCAC4 |
| 10 | MSRC | Kansas City Southern Ry. Co. | added 7/1994; 7/2000-7/2005 | | NAKINA |
| 11 | MSRC | MidSouth Rail Corp. | added 7/1986; 1/1994; eliminated 7/1994 | | NAKINA |
| 12 | MSRC | MidSouth Rail Corp. | added 7/86; 1/94; eliminated 7/94 | | NRHS |
| 13 | MSRC | Kansas City Southern Ry. Co. | added 7/94; 7/2000 | | NRHS |
| 14 | MSRC | KANSAS CITY SOUTHERN RAILWAY CO. [MIDSOUTH RAIL CORP.] | | | PWRC |
| 15 | MSRC | MidSouth Railcorp (Kansas City Southern Railway) | | | RSRV |
| 16 | MSRC | MidSouth Rail Corp. | | USA | TRAFFIC |
| 17 | MSRI | MID-STATES RAIL CAR, INC. | | | PWRC |
| 18 | MSRJ | M & | | | SCAC4 |
| 19 | MSRK | MOSER TRUCKING LLC | | | SCAC4 |
| 20 | MSRL | MATERIALES Y ACARREOS DE CERRALVO S | | | SCAC4 |
| 21 | MSRM | MECHANI | | | SCAC4 |
| 22 | MSRU | CONTAINER ASSOCIATION ROTTERDAM BV | | | SCAC4 |
| 23 | MSRV | MINERA SANTA RITA S DE RL | | | SCAC4 |
| 24 | MSRW | Mississipian Ry. Cooperative, Inc. | added 1/1987; 1/1994-7/2005 | | NAKINA |
| 25 | MSRW | Mississipian Ry. Cooperative, Inc. | added 1/87; 1/94-7/2000 | | NRHS |
| 26 | MSRW | MISSISSIPPIAN RAILWAY COOPERATIVE, INC | | | PWRC |
| 27 | MSRW | Mississippian Railway Cooperative | | | RSRV |
| 28 | MSRX | Southeastern Industrial Enterprises, Inc. | added 10/2002; 7/2005; eliminated 10/2006 | | NAKINA |
| 29 | MSRX | Modern Sanitary Rendering Co., Inc. | 4/1947-1/1952; eliminated 4/1954; 7/1954 | | NAKINA |
| 30 | MSRX | Modern Sanitary Rendering Co., Inc. | 1/52; eliminated 4/54 | | NRHS |
| 31 | MSRX | *MODERN SANITARY RENDERING CO., INC. | | | PWRC |
| 32 | MSRX | *MISSOURI SOUTHEASTERN RAILROAD | | | PWRC |
| 33 | MSRX | +SOUTHEASTERN INDUSTRIAL ENTERPRISES, INC. | | | PWRC |
| 34 | MSRX | SOUTHEASTERN INDUSTRIAL ENTERPRISES | | | SCAC4 |
| 35 | MSRY | MSR | | | SCAC4 |
