| 301 | RSLA | ROSELAND TRUCKING INC | | | SCAC4 |
| 302 | RSLB | RIVER SIDE LOGISTICS LLC | | | SCAC4 |
| 303 | RSLC | ROSELLE CONSTRUCTION INC | | | SCAC3 |
| 304 | RSLC | RS LOGISTICS LIMITED. | | | SCAC4 |
| 305 | RSLD | ROSELAND TRUCKING CORP | | | SCAC3 |
| 306 | RSLD | ROSE LIMITED | | | SCAC4 |
| 307 | RSLE | ROSELLE TRUCKING | | | SCAC3 |
| 308 | RSLE | RICAUD SANCHEZ, LOURDES ELIZABETH S | | | SCAC4 |
| 309 | RSLF | RUSSEL FREIGHT LINES INC | | | SCAC3 |
| 310 | RSLF | RED STAR LOGISTICS INC | | | SCAC4 |
| 311 | RSLG | RIVERSIDE LOGISTICS INC | | | SCAC4 |
| 312 | RSLI | RISELING MOTOR EXPRESS, INC | | | SCAC3 |
| 313 | RSLI | RYCO SERVICES LLC | | | SCAC4 |
| 314 | RSLJ | RUSSELL, JIM SERVICE INC | | | SCAC3 |
| 315 | RSLJ | RESTORC LTD | | | SCAC4 |
| 316 | RSLL | RUSSELL, PAUL WALTER | | | SCAC3 |
| 317 | RSLN | RLC STEAMSHIP LINES | | | SCAC3 |
| 318 | RSLN | RAZO SILVA, ADAN | | | SCAC4 |
| 319 | RSLO | R & S LINES INC | | | SCAC4 |
| 320 | RSLP | RISSLER, PAUL R | | | SCAC3 |
| 321 | RSLQ | ROYAL STATE LINE INC | | | SCAC4 |
| 322 | RSLR | READY SET LOAD LLC | | | SCAC4 |
| 323 | RSLS | RUSSELL, FRANK & SON | | | SCAC3 |
| 324 | RSLS | ROSE, J | | | SCAC4 |
| 325 | RSLT | ROXEN SHIPPING LIMITED | | | SCAC4 |
| 326 | RSLU | MATSON SOUTH PACIFIC LTD | | NZ | BIC |
| 327 | RSLU | REEF SHIPPING LTD | | | SCAC4 |
| 328 | RSLW | R S LIQUID WASTE DISPOSAL INC | | | SCAC3 |
| 329 | RSLX | Hexion Specialty Chemicals, Inc. | added 7/2007 | | NAKINA |
| 330 | RSLX | Resolution Performance Products | added 4/2001; 7/2005; eliminated 7/2007 | | NAKINA |
| 331 | RSLX | Shell Epoxy Resins | added 1/2001; eliminated 4/2001 | | NAKINA |
| 332 | RSLX | RSL Corp. | added 10/1978; 1/1980; eliminated 10/1984 | | NAKINA |
| 333 | RSLX | RSL Corp. | added 10/78; 1/80; eliminated 10/84 | | NRHS |
| 334 | RSLX | Shell Epoxy Resins | added 1/2001; eliminated 4/2001 | | NRHS |
| 335 | RSLX | Resolution Performance Products | added 4/2001 | | NRHS |
| 336 | RSLX | *RSL CORPORATION | | | PWRC |
| 337 | RSLX | *RESOLUTION PERFORMANCE PRODUCTS [SHELL EPOXY RESINS] | | | PWRC |
| 338 | RSLX | +HEXION SPECIALTY CHEMICALS, INC. | | | PWRC |
| 339 | RSLX | RSL Corporation | | | RSRV |
| 340 | RSLX | HEXION SPECIALITY CHEMICALS INC | | | SCAC4 |
| 341 | RSM | Air Somalia | Callsign: Air Somalia, Founded in 2001. Ceased operations. | SO | AVCODES |
| 342 | RSM | Royal Star Aviation Inc. | Callsign: Royal Star, | RP | AVCODES |
| 343 | RSM | Air Somalia | | | ICAO1 |
| 344 | RSM | Railroad Switching Service of Missouri, Inc. | added 10/1989; eliminated 7/1991; 1/1994-7/2005 | | NAKINA |
| 345 | RSM | Railroad Switching Service of Missouri, Inc. | added 10/89; eliminated 7/91; 1/94-7/2000 | | NRHS |
| 346 | RSM | RAILROAD SWITCHING SERVICE OF MISSOURI, INC. | | | PWRC |
| 347 | RSM | Railroad Switching Service of Missouri | | | RSRV |
| 348 | RSMB | RODRIGUEZ SANTA MARIA, ROBERTO | | | SCAC4 |
| 349 | RSMC | ROSE MARIE INCORPORATED | | | SCAC4 |
| 350 | RSMD | ROSE, MICHAEL DAMON | | | SCAC3 |
| 351 | RSMD | ROSEMAR LIMITED | | | SCAC4 |
| 352 | RSME | RASMUSSEN MANAGEMENT | | | SCAC3 |
| 353 | RSMG | RS MOVING & STORAGE SOLUTIONS INC | | | SCAC4 |
| 354 | RSMH | RAIL SCALE MINIATURES | | | SCAC4 |
| 355 | RSMK | R SAN MIGUEL TRUCKING | | | SCAC4 |
| 356 | RSMM | RUSHMORE TRANSPORTATION LTD | | | SCAC4 |
| 357 | RSMN | ROSEMONT TRANSPORT INC | | | SCAC4 |
| 358 | RSMO | ROSE MOVING & STG CO INC | | | SCAC3 |
| 359 | RSMO | ROSE MOVING & STORAGE CO INC | | | SCAC4 |
| 360 | RSMP | RUSMIN TRUCKING | | | SCAC3 |
| 361 | RSMP | RS MOTORSPORTS | | | SCAC4 |
| 362 | RSMQ | RASMUSSEN SERVICE INC | | | SCAC3 |
| 363 | RSMQ | ROSAS, M TRANSPORT | | | SCAC4 |
| 364 | RSMS | ROUSH MOVING & STORAGE CO | | | SCAC3 |
| 365 | RSMT | R S M TRANSPORT INC | | | SCAC3 |
| 366 | RSMT | ROSS MARITIME INC | | | SCAC4 |
| 367 | RSMU | REMUS MARINE CO., INC. | | | SCAC3 |
| 368 | RSMW | RED SEA MARINE C/O NORDIC MARITIME | | | SCAC4 |
| 369 | RSMY | R S M TRUCKING LLC | | | SCAC4 |
| 370 | RSN | Royal Swazi National Airways Corp. | IATA: ZC, Callsign: Swazi National, IATA Prefix: 141, Designator ZC recalled by IATA | SD | AVCODES |
| 371 | RSN | Royal Swazi National Airways | | | ICAO1 |
| 372 | RSNA | ROSSANA VAN LINES | | | SCAC3 |
| 373 | RSNC | ROBERTS & SONS CARTAGE CO | | | SCAC3 |
| 374 | RSNC | RS TRANSFER SA DE CV | | | SCAC4 |
| 375 | RSNE | RESNER, PHIL TRUCKING | | | SCAC4 |
| 376 | RSNF | ROSEN FORWARDERS INC | | | SCAC3 |
| 377 | RSNG | ROSSING TRUCK CO | | | SCAC3 |
| 378 | RSNI | READS MOVING SYSTEMS OF NORFOLK INC | | | SCAC4 |
| 379 | RSNJ | ROSENO TRUCKING | | | SCAC4 |
| 380 | RSNK | RED SUN TRANSPORT CO | | | SCAC4 |
| 381 | RSNM | RESENDES | | | SCAC4 |
| 382 | RSNN | ROBISON & SONS DAIRY | | | SCAC4 |
| 383 | RSNO | ROSIN TRANSPORT | | | SCAC4 |
| 384 | RSNR | Red Springs and Northern R.R. Co. | added 1/1985; 1/1994; eliminated 7/1996; 7/2000-7/2005 | | NAKINA |
| 385 | RSNR | Red Springs and Northern R.R. Co. | added 1/85; 1/94; eliminated 7/96; 7/2000 | | NRHS |
| 386 | RSNR | RED SPRINGS & NORTHERN RAILROAD CO. | | | PWRC |
| 387 | RSNR | Red Springs and Northern Railroad | | | RSRV |
| 388 | RSNR | RED SPRINGS NORTHERN RAILROAD CO | | | SCAC3 |
| 389 | RSNS | RISING STAR TRANSPORTATION INC | | | SCAC4 |
| 390 | RSNV | RED SPIRIT NAVIGATION LIMITED, MALT | | | SCAC4 |
| 391 | RSNX | Railrunner N.A., Inc. | added 1/2004 | | NAKINA |
| 392 | RSNX | RAILRUNNER N.A., INC. | | | PWRC |
| 393 | RSNY | REPUBLIC STEEL (NEW YORK) | | | PWRC |
| 394 | RSNY | RAVENSCROFT SHIPPING INC, NY | | | SCAC3 |
| 395 | RSNY | RAVENSCROFT SHIP MANAGEMENT INC | | | SCAC4 |
| 396 | RSO | Aero Asia International (Private) Ltd. | IATA: E4, Callsign: Aero Asia, IATA Prefix: 532, | PK | AVCODES |
| 397 | RSO | Aero Asia International | IATA: E4 | | ICAO1 |
| 398 | RSOA | R S OIL CORPORATION | | | SCAC4 |
| 399 | RSOC | RSO INC | | | SCAC3 |
| 400 | RSOD | RESOURCE DISTRIBUTION INC | | | SCAC3 |
