| 8301 | RSCA | ROAD SCHOLAR TRANSPORT INC | | | SCAC4 |
| 8302 | RSCB | R STREET-CITY TRANSPORT LTD | | | SCAC4 |
| 8303 | RSCG | R & S CARTAGE INC | | | SCAC3 |
| 8304 | RSCH | ROSS CHARTERS INC, A NORTH CAROLINA | | | SCAC3 |
| 8305 | RSCI | ROSECO INC | | | SCAC4 |
| 8306 | RSCJ | RICHMOND STEEL CANADA LIMITED | | | SCAC4 |
| 8307 | RSCK | R & S TRUCKING | | | SCAC3 |
| 8308 | RSCK | RUSH CREEK TRUCKING LLC | | | SCAC4 |
| 8309 | RSCL | ROTARY SHIPPING CO LIMITED | | | SCAC3 |
| 8310 | RSCM | REPORT SHIPPING COMPANY LTD. | | | SCAC3 |
| 8311 | RSCN | RSC TRANSPORTATION INC | | | SCAC4 |
| 8312 | RSCO | RONS SERVICE CO | | | SCAC3 |
| 8313 | RSCO | Rolling Stock Company | | RO | TRAFFIC |
| 8314 | RSCO | ROLLING STOCK COMPANY S.A. | | RO | VKM |
| 8315 | RSCQ | REIS CARTAGE CO | | | SCAC3 |
| 8316 | RSCR | RUSCO TRUCKING | | | SCAC3 |
| 8317 | RSCR | R S CARRIER INC | | | SCAC4 |
| 8318 | RSCS | R & S COURIERS INC | | | SCAC3 |
| 8319 | RSCT | RSC LOGISTICS LLC | | | SCAC4 |
| 8320 | RSCU | RAMSEY SCARLETT & CO INC | | | SCAC3 |
| 8321 | RSCU | RED SEA NAVIGATION CO | | | SCAC4 |
| 8322 | RSCV | ROMAR STONE CARVING | | | SCAC4 |
| 8323 | RSCX | Republic Steel Corp. | 7/1935-4/1970; eliminated 1/1972 | | NAKINA |
| 8324 | RSCX | The Ralston Steel Car Co. | 7/1923 | | NAKINA |
| 8325 | RSCX | Republic Steel Corp. | 4/38-4/70; eliminated 1/72 | | NRHS |
| 8326 | RSCX | *RALSTON STEEL CAR CO. | | | PWRC |
| 8327 | RSCX | *REPUBLIC STEEL CO. | | | PWRC |
| 8328 | RSCX | *RESCAR | | | PWRC |
| 8329 | RSCX | REPUBLIC STEEL CORP | | | SCAC3 |
| 8330 | RSCX | Republic Steel Corporation | | USA | TRAFFIC |
| 8331 | RSCY | ROSE CITY TRANSPORTATION INC | | | SCAC4 |
| 8332 | RSCZ | *(CSXT) RETIRED 04-06-93 ATP (ACI 2389) | | | PWRC |
| 8333 | RSCZ | *RYERSON STEEL CO. | | | PWRC |
| 8334 | RSD | Airside Aviation Limited | Callsign: Airside, | GB | AVCODES |
| 8335 | RSD | RSD-Sicherheitsdienst GmbH& Co. | | DE | VKM |
| 8336 | RSDB | RSD CONTRACTING LTD | | | SCAC4 |
| 8337 | RSDC | ROSSI, D CONSTRUCTION CO INC | | | SCAC3 |
| 8338 | RSDC | ROSEDALE MECHANICAL LTD | | | SCAC4 |
| 8339 | RSDD | ROSS DELIVERY SERVICE INC | | | SCAC4 |
| 8340 | RSDE | R S D ENTERPRISES INC | | | SCAC3 |
| 8341 | RSDE | ROSE, DENIS JR TRUCKING INC | | | SCAC4 |
| 8342 | RSDER | RAILSIDER LOGISTICA FERROVIARIA, S.A. | | ES | VKM |
| 8343 | RSDF | REISDORF, DAVE INC | | | SCAC4 |
| 8344 | RSDH | ROSEDALE HUTTERIAN BRETHERN INC | | | SCAC4 |
| 8345 | RSDI | R S D SERVICES INC | | | SCAC3 |
| 8346 | RSDL | ROSEDALE TRANSPORT INC | | | SCAC4 |
| 8347 | RSDM | RSDS | | | SCAC3 |
| 8348 | RSDM | RSDS | | | SCAC4 |
| 8349 | RSDN | R & S DISTRIBUTION | | | SCAC4 |
| 8350 | RSDO | ROSADO, LOUIS TRUCKING INC | | | SCAC3 |
| 8351 | RSDP | R A S DISTRIBUTION CORPORATION | | | SCAC4 |
| 8352 | RSDQ | ROSE, DONALD R | | | SCAC4 |
| 8353 | RSDR | ROSS, DENNIS R TRUCKING | | | SCAC3 |
| 8354 | RSDR | RIO TRANSPORTES EXPRESS SA DE CV | | | SCAC4 |
| 8355 | RSDS | RELIANCE SPECIAL DELIVERY SERVICE, INC | | | SCAC3 |
| 8356 | RSDT | R S D TRANSPORTATION INC | | | SCAC3 |
| 8357 | RSDW | RMMJ SERVICE & DELIVERY LLC | | | SCAC4 |
| 8358 | RSDY | R & S DISTRIBUTIONS SYSTEMS | | | SCAC3 |
| 8359 | RSE | SNAS Aviation | Callsign: Red Sea, IATA Prefix: 952, Accounting & Prefix Codes recalled by IATA | SA | AVCODES |
| 8360 | RSE | Irose Limited | Callsign: Irose, | BS | AVCODES |
| 8361 | RSE | SNAS Aviation | | | ICAO1 |
| 8362 | RSE | Rhein-Sieg-Eisenbahn-Betriebsgesellschaft mbH | Bonn | D | privat-bahn.de |
| 8363 | RSE | Rhein-Sieg-Eisenbahn | | D | TRAFFIC |
| 8364 | RSE | Rhein-Sieg-Eisenbahn | | DE | VKM |
| 8365 | RSEA | ROAD & SEA TRANSPORT INC | | | SCAC3 |
| 8366 | RSEC | RIOSECO, ARTURO | | | SCAC3 |
| 8367 | RSEC | ROSE CONTAINERLINE INC | | | SCAC4 |
| 8368 | RSEE | RUSSELL ENTERPRISES INC | | | SCAC3 |
| 8369 | RSEF | RAYS SEAFOOD MARKET INC | | | SCAC4 |
| 8370 | RSEG | RISING STAR ENTERPRISES LTD | | | SCAC4 |
| 8371 | RSEH | REHOBOT SERVICES | | | SCAC4 |
| 8372 | RSEI | ROSE CARTAGE SERVICE INC | | | SCAC3 |
| 8373 | RSEI | ROSE CARTAGE SERVICE INC | | | SCAC4 |
| 8374 | RSEJ | ROSE, J H TRUCK LINE INC | | | SCAC3 |
| 8375 | RSEJ | Railservice | | DK | VKM |
| 8376 | RSEK | ROSE TRUCKING | | | SCAC3 |
| 8377 | RSEL | TNT RED STAR EXPRESS, INC | | | SCAC3 |
| 8378 | RSEL | RED SEA EXPRESS LLC | | | SCAC4 |
| 8379 | RSEN | ROSE TRANSPORTATION | | | SCAC3 |
| 8380 | RSEN | ROSE TRANSPORTATION | | | SCAC4 |
| 8381 | RSEO | R S ELECTRONICS | | | SCAC3 |
| 8382 | RSEP | RED STAR EXPRESS LINES OF ONTARIO L | | | SCAC3 |
| 8383 | RSEP | R S EXPRESS INC | | | SCAC4 |
| 8384 | RSEQ | RISSER, M D TRUCKING | | | SCAC4 |
| 8385 | RSER | ROSE TRANSPORT INC | | | SCAC3 |
| 8386 | RSES | R S EXPRESS | | | SCAC3 |
| 8387 | RSES | RIOS EXPRESS | | | SCAC4 |
| 8388 | RSET | REESE TRUCKING INC | | | SCAC3 |
| 8389 | RSEU | REEFER SALES EUROPE BV | | NL | BIC |
| 8390 | RSEV | RELIABLE SERVICES INC | | | SCAC3 |
| 8391 | RSEW | R & S EXPRESS LLC | | | SCAC4 |
| 8392 | RSEX | Riverside Chemical Co. | added 1/1975; 1/1975; eliminated 4/1978 | | NAKINA |
| 8393 | RSEX | Riverside Chemical Co. | added 1/75; 1/75; eliminated 4/78 | | NRHS |
| 8394 | RSEX | RIVERSIDE CHEMICAL CO. | | | PWRC |
| 8395 | RSF | Royal Saudi Air Force | Callsign: Arsaf, | SA | AVCODES |
| 8396 | RSF | Royal Saudi Air Force | | | ICAO1 |
| 8397 | RSFA | ROYAL SAFARI INCORPORATED | | | SCAC3 |
| 8398 | RSFA | R & S FREIGHT SYSTEMS INC | | | SCAC4 |
| 8399 | RSFC | ROSY SERVICES FORWARDERS CORP | | | SCAC3 |
| 8400 | RSFD | RITCHIE-SMITH FEEDS INC | | | SCAC4 |
