| 8501 | RSJH | RUSSELL, J H INC | | | SCAC3 |
| 8502 | RSJK | RIESSLE, JAMES TRUCKING | | | SCAC4 |
| 8503 | RSJT | RSJ TRANSPORTATION CO INC | | | SCAC3 |
| 8504 | RSK | DSWA LLC | Callsign: Redskin, | USA | AVCODES |
| 8505 | RSK | DSWA | | | ICAO1 |
| 8506 | RSKA | RIELEROS TRUCKING INC | | | SCAC4 |
| 8507 | RSKD | RED SKYE TRUCKING LTD | | | SCAC4 |
| 8508 | RSKG | RIST TRUCKING | | | SCAC3 |
| 8509 | RSKG | R S TRUCKING | | | SCAC4 |
| 8510 | RSKH | ROMEROS TRUCKING, THE | | | SCAC4 |
| 8511 | RSKL | RSK LOGISTICS LLC | | | SCAC4 |
| 8512 | RSKN | REISS TRUCKING | | | SCAC4 |
| 8513 | RSKO | R & S TRUCKING | | | SCAC4 |
| 8514 | RSKP | ROSKOP TRUCK LINES | | | SCAC3 |
| 8515 | RSKQ | REST TRUCKING INC | | | SCAC4 |
| 8516 | RSKS | ROSKAM & SON | | | SCAC3 |
| 8517 | RSKT | ROSIEK CONSTRUCTION COMPANY INC | | | SCAC3 |
| 8518 | RSKY | RED SKY FISHING COMPANY LTD | | | SCAC4 |
| 8519 | RSL | Rio Sul Linhas Aereos, S.A. | IATA: SL, Callsign: Riossul, IATA Prefix: 293, Merged with Nordeste and then into Varig. Name changed from Rio-Sul Servicos Aereos Regionais, S.A. Designator SL reinstated by IATA | BR | AVCODES |
| 8520 | RSL | Rio-Sul Servicos Aereos Regionais, S.A. | IATA: SL, Callsign: Riossul, IATA Prefix: 293, Name changed to Rio Sul Linhas Aereas S.A. Designator SL reinstated by IATA | BR | AVCODES |
| 8521 | RSL | Panama Aircraft Rental and Sales, Inc. | Callsign: Panama Rental, | PA | AVCODES |
| 8522 | RSL | Rio Sul Serviços Aéreos Regionais | IATA: SL | | ICAO1 |
| 8523 | RSL | Rad und Schiene Logistik GmbH | | DE | VKM |
| 8524 | RSLA | ROSELAND TRUCKING INC | | | SCAC4 |
| 8525 | RSLB | RIVER SIDE LOGISTICS LLC | | | SCAC4 |
| 8526 | RSLC | ROSELLE CONSTRUCTION INC | | | SCAC3 |
| 8527 | RSLC | RS LOGISTICS LIMITED. | | | SCAC4 |
| 8528 | RSLD | ROSELAND TRUCKING CORP | | | SCAC3 |
| 8529 | RSLD | ROSE LIMITED | | | SCAC4 |
| 8530 | RSLE | ROSELLE TRUCKING | | | SCAC3 |
| 8531 | RSLE | RICAUD SANCHEZ, LOURDES ELIZABETH S | | | SCAC4 |
| 8532 | RSLF | RUSSEL FREIGHT LINES INC | | | SCAC3 |
| 8533 | RSLF | RED STAR LOGISTICS INC | | | SCAC4 |
| 8534 | RSLG | RIVERSIDE LOGISTICS INC | | | SCAC4 |
| 8535 | RSLI | RISELING MOTOR EXPRESS, INC | | | SCAC3 |
| 8536 | RSLI | RYCO SERVICES LLC | | | SCAC4 |
| 8537 | RSLJ | RUSSELL, JIM SERVICE INC | | | SCAC3 |
| 8538 | RSLJ | RESTORC LTD | | | SCAC4 |
| 8539 | RSLL | RUSSELL, PAUL WALTER | | | SCAC3 |
| 8540 | RSLN | RLC STEAMSHIP LINES | | | SCAC3 |
| 8541 | RSLN | RAZO SILVA, ADAN | | | SCAC4 |
| 8542 | RSLO | R & S LINES INC | | | SCAC4 |
| 8543 | RSLP | RISSLER, PAUL R | | | SCAC3 |
| 8544 | RSLQ | ROYAL STATE LINE INC | | | SCAC4 |
| 8545 | RSLR | READY SET LOAD LLC | | | SCAC4 |
| 8546 | RSLS | RUSSELL, FRANK & SON | | | SCAC3 |
| 8547 | RSLS | ROSE, J | | | SCAC4 |
| 8548 | RSLT | ROXEN SHIPPING LIMITED | | | SCAC4 |
| 8549 | RSLU | MATSON SOUTH PACIFIC LTD | | NZ | BIC |
| 8550 | RSLU | REEF SHIPPING LTD | | | SCAC4 |
| 8551 | RSLW | R S LIQUID WASTE DISPOSAL INC | | | SCAC3 |
| 8552 | RSLX | Hexion Specialty Chemicals, Inc. | added 7/2007 | | NAKINA |
| 8553 | RSLX | Resolution Performance Products | added 4/2001; 7/2005; eliminated 7/2007 | | NAKINA |
| 8554 | RSLX | Shell Epoxy Resins | added 1/2001; eliminated 4/2001 | | NAKINA |
| 8555 | RSLX | RSL Corp. | added 10/1978; 1/1980; eliminated 10/1984 | | NAKINA |
| 8556 | RSLX | RSL Corp. | added 10/78; 1/80; eliminated 10/84 | | NRHS |
| 8557 | RSLX | Shell Epoxy Resins | added 1/2001; eliminated 4/2001 | | NRHS |
| 8558 | RSLX | Resolution Performance Products | added 4/2001 | | NRHS |
| 8559 | RSLX | *RSL CORPORATION | | | PWRC |
| 8560 | RSLX | *RESOLUTION PERFORMANCE PRODUCTS [SHELL EPOXY RESINS] | | | PWRC |
| 8561 | RSLX | +HEXION SPECIALTY CHEMICALS, INC. | | | PWRC |
| 8562 | RSLX | RSL Corporation | | | RSRV |
| 8563 | RSLX | HEXION SPECIALITY CHEMICALS INC | | | SCAC4 |
| 8564 | RSM | Air Somalia | Callsign: Air Somalia, Founded in 2001. Ceased operations. | SO | AVCODES |
| 8565 | RSM | Royal Star Aviation Inc. | Callsign: Royal Star, | RP | AVCODES |
| 8566 | RSM | Air Somalia | | | ICAO1 |
| 8567 | RSM | Railroad Switching Service of Missouri, Inc. | added 10/1989; eliminated 7/1991; 1/1994-7/2005 | | NAKINA |
| 8568 | RSM | Railroad Switching Service of Missouri, Inc. | added 10/89; eliminated 7/91; 1/94-7/2000 | | NRHS |
| 8569 | RSM | RAILROAD SWITCHING SERVICE OF MISSOURI, INC. | | | PWRC |
| 8570 | RSM | Railroad Switching Service of Missouri | | | RSRV |
| 8571 | RSMB | RODRIGUEZ SANTA MARIA, ROBERTO | | | SCAC4 |
| 8572 | RSMC | ROSE MARIE INCORPORATED | | | SCAC4 |
| 8573 | RSMD | ROSE, MICHAEL DAMON | | | SCAC3 |
| 8574 | RSMD | ROSEMAR LIMITED | | | SCAC4 |
| 8575 | RSME | RASMUSSEN MANAGEMENT | | | SCAC3 |
| 8576 | RSMG | RS MOVING & STORAGE SOLUTIONS INC | | | SCAC4 |
| 8577 | RSMH | RAIL SCALE MINIATURES | | | SCAC4 |
| 8578 | RSMK | R SAN MIGUEL TRUCKING | | | SCAC4 |
| 8579 | RSMM | RUSHMORE TRANSPORTATION LTD | | | SCAC4 |
| 8580 | RSMN | ROSEMONT TRANSPORT INC | | | SCAC4 |
| 8581 | RSMO | ROSE MOVING & STG CO INC | | | SCAC3 |
| 8582 | RSMO | ROSE MOVING & STORAGE CO INC | | | SCAC4 |
| 8583 | RSMP | RUSMIN TRUCKING | | | SCAC3 |
| 8584 | RSMP | RS MOTORSPORTS | | | SCAC4 |
| 8585 | RSMQ | RASMUSSEN SERVICE INC | | | SCAC3 |
| 8586 | RSMQ | ROSAS, M TRANSPORT | | | SCAC4 |
| 8587 | RSMS | ROUSH MOVING & STORAGE CO | | | SCAC3 |
| 8588 | RSMT | R S M TRANSPORT INC | | | SCAC3 |
| 8589 | RSMT | ROSS MARITIME INC | | | SCAC4 |
| 8590 | RSMU | REMUS MARINE CO., INC. | | | SCAC3 |
| 8591 | RSMW | RED SEA MARINE C/O NORDIC MARITIME | | | SCAC4 |
| 8592 | RSMY | R S M TRUCKING LLC | | | SCAC4 |
| 8593 | RSN | Royal Swazi National Airways Corp. | IATA: ZC, Callsign: Swazi National, IATA Prefix: 141, Designator ZC recalled by IATA | SD | AVCODES |
| 8594 | RSN | Royal Swazi National Airways | | | ICAO1 |
| 8595 | RSNA | ROSSANA VAN LINES | | | SCAC3 |
| 8596 | RSNC | ROBERTS & SONS CARTAGE CO | | | SCAC3 |
| 8597 | RSNC | RS TRANSFER SA DE CV | | | SCAC4 |
| 8598 | RSNE | RESNER, PHIL TRUCKING | | | SCAC4 |
| 8599 | RSNF | ROSEN FORWARDERS INC | | | SCAC3 |
| 8600 | RSNG | ROSSING TRUCK CO | | | SCAC3 |
