| 9401 | SRKX | STANDARD REFRIGERATOR CAR CO. | | | PWRC |
| 9402 | SRKY | S & R TRUCKING | | | SCAC4 |
| 9403 | SRL | AB Varmlandsflyg | IATA: T9, Callsign: Starline, Name changed to Swedline Express AB w.e.f. 01 December 2002. | S | AVCODES |
| 9404 | SRL | Swedline Express AB | IATA: T9, Callsign: Starline, IATA designator changed to SM. Name changed from AB Varmlandsflyg w.e.f. 01 December 2002. | S | AVCODES |
| 9405 | SRL | Swedline Express AB | IATA: SM, Callsign: Starline, IATA designator changed from T9*. Name changed from AB Varmlandsflyg w.e.f. 01 December 2002. | S | AVCODES |
| 9406 | SRL | Swedline Express | IATA: SM | | ICAO1 |
| 9407 | SRL | Servicios Aeronauticos Aero Personal | | | ICAO1 |
| 9408 | SRL | Swift Refrigerator Line (General American Transportation Corp.) | 7/1935 | | NAKINA |
| 9409 | SRL | SWIFT REFRIGERATOR LINES (EXPIRED) | | | PWRC |
| 9410 | SRL | Swift Refrigerator Lines | | | RSRV |
| 9411 | SRL | Stahlberg Roensch Leipzig GmbH | | DE | VKM |
| 9412 | SRLB | SHEAROUSE LUMBER COMPANY | | | SCAC4 |
| 9413 | SRLD | SORRELS TRUCKING COMPANY INCORPORAT | | | SCAC4 |
| 9414 | SRLE | SORRENTO LOBSTER INC | | | SCAC4 |
| 9415 | SRLF | SRL TRUCKING INC | | | SCAC4 |
| 9416 | SRLG | STRATEGIC LOGISTICS INC | | | SCAC4 |
| 9417 | SRLJ | SEVEN ROAD LOGISTICS INC | | | SCAC4 |
| 9418 | SRLK | SWIFT RESOLUTE LTD | | | SCAC4 |
| 9419 | SRLL | SHORELINE TRANSPORTATION OF ALABAMA | | | SCAC4 |
| 9420 | SRLM | SUNRISE LOGISTICS INC | | | SCAC4 |
| 9421 | SRLN | STARLINE | | | SCAC4 |
| 9422 | SRLO | STROLLIN' R INC | | | SCAC4 |
| 9423 | SRLU | SUPER RACK CO., LTD | | ROK | BIC |
| 9424 | SRLW | SIERRA REDWOOD LLC | | | SCAC4 |
| 9425 | SRLX | Swift Refrigerator Line (General American Transportation Corp.) (previously S.R.L.) | added 11/1934; 7/1935 | | NAKINA |
| 9426 | SRLX | General American Transportation Corp. | 7/1937-7/1965 | | NAKINA |
| 9427 | SRLX | Swift Refrigerator Line (General American Transportation Corp.) | 10/1966 | | NAKINA |
| 9428 | SRLX | General American Transportation Corp. | 4/1970-1/1980; eliminated 10/1992 | | NAKINA |
| 9429 | SRLX | Southern Rail Leasing, Inc. | 7/2000-7/2005 | | NAKINA |
| 9430 | SRLX | Swift Refrigerator Line (General American Transportation Corp.) | Apr-38 | | NRHS |
| 9431 | SRLX | General American Transportation Corp. | 1/52-7/65 | | NRHS |
| 9432 | SRLX | Swift Refrigerator Line (General American Transportation Corp.) | Oct-66 | | NRHS |
| 9433 | SRLX | General American Transportation Corp. | 4/70-1/80; eliminated 10/92 | | NRHS |
| 9434 | SRLX | Southern Rail Leasing, Inc. | Jul-00 | | NRHS |
| 9435 | SRLX | *(GATX) RETIRED 08-19-92 ATP (1569) [SWIFT REFRIGERATOR LINE (GATC)] | | | PWRC |
| 9436 | SRLX | +SOUTHERN RAIL LEASING, INC. | | | PWRC |
| 9437 | SRLX | General American Transportation Corporation (GATX) | | | RSRV |
| 9438 | SRLX | Swift Refrigerator Line | | USA | TRAFFIC |
| 9439 | SRLY | SANDY RIDGE LIVESTOCK | | | SCAC4 |
| 9440 | SRM | Flying Swiss Ambulance Maldives (Pvt) Ltd. | | MV | AVCODES |
| 9441 | SRM | Stars de Mexico, C.V. de S.A. | Callsign: Tarmex, | MEX | AVCODES |
| 9442 | SRM | Strukton Railinfra Materieel | | NL | VKM |
| 9443 | SRMB | SUPERIOR MOBILITY SERVICES LLC | | | SCAC4 |
| 9444 | SRMC | SPEARS MATTRESS CO INC | | | SCAC4 |
| 9445 | SRMD | SHERMA | | | SCAC4 |
| 9446 | SRMH | STREAMLINE LOGISTICS LLC | | | SCAC4 |
| 9447 | SRMI | SERVICE RM | | | SCAC4 |
| 9448 | SRMJ | SERTA RESTOKRAFT MATTRESS CO INC | | | SCAC4 |
| 9449 | SRMM | SCHRAM | | | SCAC4 |
| 9450 | SRMO | SIERRA MOVING SYSTEMS | | | SCAC4 |
| 9451 | SRMQ | SCARR MOVING & STORAGE INC | | | SCAC4 |
| 9452 | SRMR | SCHROEDERM | | | SCAC4 |
| 9453 | SRMS | BRAIRTOWN EXPRESS | | | SCAC3 |
| 9454 | SRMT | SCRAMCO TRANSPORTATION | | | SCAC4 |
| 9455 | SRMU | SICAL MULTIMODAL AND RAIL TRANSPORT | | | SCAC4 |
| 9456 | SRMX | United Technologies Chemical System Division | 1/1994 (not listed) | | NAKINA |
| 9457 | SRMX | Southeastern Railway Services, Inc. | 7/2005 (not listed) | | NAKINA |
| 9458 | SRMX | United Technologies Chemical System Division | Jan-94 | | NRHS |
| 9459 | SRMX | *UNITED TECHNOLOGIES CHEMICAL SYSTEMS | | | PWRC |
| 9460 | SRMX | *SOUTHEASTERN RAILWAY MUSEUM | | | PWRC |
| 9461 | SRMX | +SOUTHEASTERN RAILWAY SERVICES, INC. | | | PWRC |
| 9462 | SRMX | SOUTHEASTERN RAILWAY SERVICES INC | | | SCAC4 |
| 9463 | SRMY | STORMEY TRANSPORTATION INC | | | SCAC4 |
| 9464 | SRMZ | SUN REFINING & MARKETING | | | PWRC |
| 9465 | SRN | Servicios Aeronauticos, S.A. de C.V. | Callsign: Servinauticos, | MEX | AVCODES |
| 9466 | SRN | Sirair | Callsign: Sirair, | RUS | AVCODES |
| 9467 | SRN | SprintAir SA | IATA: HS, Callsign: Sprintair, IATA designator changed to P8. Founded in 2003. | PL | AVCODES |
| 9468 | SRN | SprintAir SA | IATA: P8, Callsign: Sprintair, IATA designator changed from HS*. Founded in 2003. | PL | AVCODES |
| 9469 | SRN | Sirair | | | ICAO1 |
| 9470 | SRN | Sabine River & Northern R.R. Co. | 1/1975-7/2005 | | NAKINA |
| 9471 | SRN | Sabine River & Northern R.R. Co. | 1/75-7/2000 | | NRHS |
| 9472 | SRN | SABINE RIVER & NORTHERN RAILROAD CO. | | | PWRC |
| 9473 | SRN | Sabine River and Northern Railroad | | | RSRV |
| 9474 | SRN | Sabine River & Northern R.R. Co. | | USA | TRAFFIC |
| 9475 | SRN | Sanirail Nürnberg Gleis und Tiefbau GmbH | | DE | VKM |
| 9476 | SRND | SARAI, RON TRANSPORT LTD | | | SCAC4 |
| 9477 | SRNE | SUNRAISE INC | | | SCAC4 |
| 9478 | SRNG | STRONG ARM DELIVERIES | | | SCAC4 |
| 9479 | SRNJ | Southern R.R. Co. of New Jersey | added 7/1992; eliminated 1/1994; 7/2000-7/2005 | | NAKINA |
| 9480 | SRNJ | Southern R.R. Co. of New Jersey | added 7/92; eliminated 1/94; 7/2000 | | NRHS |
| 9481 | SRNJ | SOUTHERN RAILROAD COMPANY OF NEW JERSEY | | | PWRC |
| 9482 | SRNJ | Southern Railroad of New Jersey | | | RSRV |
| 9483 | SRNJ | SOUTHERN RAILROAD COMPANY OF NEW JE | | | SCAC4 |
| 9484 | SRNJ | Southern Railroad Company of New Jersey | | USA | TRAFFIC |
| 9485 | SRNL | SARNO LOGISTICS LLC | | | SCAC4 |
| 9486 | SRNM | SORIANO TRANSPORTATION SERVICES | | | SCAC4 |
| 9487 | SRNP | SHARONS TRANSPORT LTD | | | SCAC4 |
| 9488 | SRNQ | SUNRUNNER TRANSPORT SERVICES INC | | | SCAC4 |
| 9489 | SRNR | SONORISATION RANGER | | | SCAC4 |
| 9490 | SRNT | SARAN TRUCKING LTD | | | SCAC4 |
| 9491 | SRNV | SUDDATH RELOCATION SYSTEMS OF NASHV | | | SCAC4 |
| 9492 | SRNX | St. Louis Oil & Refining Co. | 8/1920 | | NAKINA |
| 9493 | SRNX | Industrial Refining Co. | 7/1923 | | NAKINA |
| 9494 | SRNX | INDUSTRIAL REFINING CO. [ST. LOUIS OIL & REFINING CO.] | | | PWRC |
| 9495 | SRNY | SANDERSON, TROY | | | SCAC4 |
| 9496 | SRO | Servicios Aereos Ejecutivos Saereo, S.A. | IATA: L6, Callsign: Saereo, IATA Prefix: 532, IATA designator changed to MZ | EC | AVCODES |
| 9497 | SRO | Servicios Aereos Rutas Oriente S.A. de C.V. | Callsign: Aereos Oriente, | MEX | AVCODES |
| 9498 | SRO | Servicios Aereos Ejecutivos Saereo, S.A. | IATA: MZ, Callsign: Saereo, IATA Prefix: 532, IATA designator changed from L6. Founded in 1994. | EC | AVCODES |
| 9499 | SRO | Servicios Aereos Ejecutivos Saereo | | | ICAO1 |
| 9500 | SRO | | Real: SAR | SA | TRAFFIC |
