| 4301 | RITA | RICHARDS TANK TRUCK SERVICE | SCAC3 | ||
| 4302 | RITAL | Rail Italia S.r.l. | IT | VKM | |
| 4303 | RITB | RICE TRANSPORT INC | SCAC3 | ||
| 4304 | RITB | Riggenthalerbahn | FAN | TRAFFIC | |
| 4305 | RITD | RODEWAY INTERNATIONAL TRADING LTD | SCAC3 | ||
| 4306 | RITD | RITCHIE DISTRIBUTING COMPANY | SCAC4 | ||
| 4307 | RITE | RITEWAY EXPRESS, INC | SCAC3 | ||
| 4308 | RITF | RISS TRANSPORT | SCAC3 | ||
| 4309 | RITG | RINGER TRUCKING | SCAC3 | ||
| 4310 | RITH | RITE TRANSPORTTION CO | SCAC3 | ||
| 4311 | RITI | ROBIN INTERNATIONAL TRANSPORT INC | SCAC4 | ||
| 4312 | RITM | RICHARD THE MOVER | SCAC3 | ||
| 4313 | RITM | RIGHT TIME TRUCKING INC | SCAC4 | ||
| 4314 | RITO | RITTER FOOD CORP | SCAC3 | ||
| 4315 | RITP | RICCI TRANSPORTATION CO INC | SCAC3 | ||
| 4316 | RITQ | RITTER OIL COMPANY | SCAC4 | ||
| 4317 | RITR | RIOLO TRANSPORTATION INC | SCAC4 | ||
| 4318 | RITS | ROCK ISLAND TRANSFER AND STORAGE CO | SCAC3 | ||
| 4319 | RITT | RITTER TRUCK LINE, INC | SCAC3 | ||
| 4320 | RITT | RITTERMAN TRUCKING LLC | SCAC4 | ||
| 4321 | RITW | RTC | SCAC4 | ||
| 4322 | RITY | R I T | SCAC3 | ||
| 4323 | RITY | RIT TRUCKING INC | SCAC4 | ||
| 4324 | RIU | Riau Airlines | ICAO1 | ||
| 4325 | RIUK | RICH, RON TRUCK LEASING INC | SCAC4 | ||
| 4326 | RIVA | RIVER TRANSPORT INC | SCAC3 | ||
| 4327 | RIVD | RIVERSIDE DISTRIBUTORS INC | SCAC3 | ||
| 4328 | RIVD | Riverdale Transit | US- | TRAFFIC | |
| 4329 | RIVG | RIVERSIDE TRUCKING COMPANY INC | SCAC3 | ||
| 4330 | RIVI | RIVERSIDE TRANSPORTATION CO INC | SCAC3 | ||
| 4331 | RIVI | Riviera Trains Ltd | Riviera Trains is a railway spot-hire company, based at Crewe in Cheshire. It owns a small fleet of Class 47 locomotives and coaching stock, were are hired to both passenger and charter train operators. | GB | TRAFFIC |
| 4332 | RIVL | RIVER PARISHES OIL CO INC | SCAC4 | ||
| 4333 | RIVN | RIVSEC WASTE PAPER CO INC | SCAC3 | ||
| 4334 | RIVO | RIVIOTTAS CARTAGE INC | SCAC3 | ||
| 4335 | RIVO | RIVERO TRANSPORT | SCAC4 | ||
| 4336 | RIVP | RIVER TERMINALS TRANSPORT INC | SCAC3 | ||
| 4337 | RIVP | RIVERA TRANSPORTATION | SCAC4 | ||
| 4338 | RIVQ | RIVER TRANSFER CORPORATION | SCAC3 | ||
| 4339 | RIVT | RIVEROS TRUCKING | SCAC4 | ||
| 4340 | RIVU | FINANCE & TRADE SERVICES B.V. | SCAC3 | ||
| 4341 | RIVV | RIVERA, LOUIS | SCAC3 | ||
| 4342 | RIVW | RIVERTOWN WINDOWS MANUFACTURING | SCAC4 | ||
| 4343 | RIWE | RICHARDSON, W E | SCAC3 | ||
| 4344 | RIWJ | RILEY, WILLIAM JAMES | SCAC3 | ||
| 4345 | RIWL | RITEWAY EXPRESS LIMITED | SCAC3 | ||
| 4346 | RIWR | RITE WAY TRUCK RENTAL | SCAC3 | ||
| 4347 | RIWR | RITE WAY TRUCK RENTAL INC | SCAC4 | ||
| 4348 | RIWS | RITE-WAY TRANSPORTATION SYSTEMS | SCAC3 | ||
| 4349 | RIWT | RITEWAY TRANSPORTATION | SCAC3 | ||
| 4350 | RIWY | RIGHT-WAY TRANSPORT INC | SCAC3 | ||
| 4351 | RIX | Robinson & Ice | 8/1920-7/1923 | NAKINA | |
| 4352 | RIX | ROBINSON & ICE | PWRC | ||
| 4353 | RIXI | RIGIONAL IMPORT & EXPORT TRUCKING C | SCAC3 | ||
| 4354 | RIXO | RIO EXPRESS CORP | SCAC4 | ||
| 4355 | RIXP | RICCIS EXPRESS | SCAC3 | ||
| 4356 | RIXP | RITAS XPRESS INC | SCAC4 | ||
| 4357 | RIXQ | RIVERSIDE EXPRESS | SCAC3 | ||
| 4358 | RIXR | R & I EXPRESS | SCAC4 | ||
| 4359 | RIXU | TRITICANTHA LOGISTIC LIMITED | SCAC4 | ||
| 4360 | RIXW | RIXWAY EXPRESS INC | SCAC3 | ||
| 4361 | RIY | The Royal Commission for Riyadh City | Real: RCRC, City: Riyadh | SA | TRAFFIC |
| 4362 | RIYU | R.I.C.U. ROMAGNOLA INVESTIMENTI | SCAC3 | ||
| 4363 | RIZO | RIZZO BROS MOVERS INC | SCAC3 | ||
| 4364 | RIZT | RIZZO TRUCKING INC | SCAC3 | ||
| 4365 | RIZZ | RIZZOLI-CATTANEO TRUCKING | SCAC3 | ||
| 4366 | RJ | Bad Orber Bimmelbahn | D | TRAFFIC | |
| 4367 | RJ | RegioJet, a.s. | CZ | VKM | |
| 4368 | RJA | Royal Jordanian | IATA: RJ | ICAO1 | |
| 4369 | RJAA | ROJAS, ALEJANDRO PLAZA | SCAC4 | ||
| 4370 | RJAF | RJB OF BIG STONE INC | SCAC4 | ||
| 4371 | RJAG | R & J AG SUPPLY | SCAC4 | ||
| 4372 | RJAI | R J ALUMINUM LLC | SCAC4 | ||
| 4373 | RJAK | RJT TRANSPORT LLC | SCAC4 | ||
| 4374 | RJAM | ROSS, JAMES LIMITED | SCAC4 | ||
| 4375 | RJAO | ROBERTSON, JASON | SCAC4 | ||
| 4376 | RJAS | ROMANOWSKI | SCAC4 | ||
| 4377 | RJAX | R.J. Allison Co. | 1/1950-7/1954; eliminated 7/1957 | NAKINA | |
| 4378 | RJAX | R.J. Allison Co. | Jan-52 | NRHS | |
| 4379 | RJAX | R. J. ALLISON CO. | PWRC | ||
| 4380 | RJAY | ROBINSON, JAY RACING LLC | SCAC4 | ||
| 4381 | RJB | Stifelsen Rjukanbanen | NO | VKM | |
| 4382 | RJBC | ROGERS, J B CONSTRUCTION CO | SCAC3 | ||
| 4383 | RJBM | RJB TRUCKING | SCAC4 | ||
| 4384 | RJBN | RUSSELL, J B & SON | SCAC4 | ||
| 4385 | RJBS | RATLIFF, JAMES C BACKHOE SERVICE | SCAC3 | ||
| 4386 | RJBS | R & J SPECIALIZED TRANSPORTATION | SCAC4 | ||
| 4387 | RJBT | RJB TRANSPORT LLC | SCAC4 | ||
| 4388 | RJBX | R.J. Brown Co. | 1/1952 | NAKINA | |
| 4389 | RJBX | R.J. Brown Co. | Jan-52 | NRHS | |
| 4390 | RJBX | R. J. BROWN CO. | PWRC | ||
| 4391 | RJC | R.J. Corman Railroad Corp. | Real: RJCR | USA | TRAFFIC |
| 4392 | RJCC | R.J. Corman R.R. Co./Central Kansas Lines | added 7/2003; 7/2005 | NAKINA | |
| 4393 | RJCC | R. J. CORMAN RAILROAD COMPANY - CENTRAL KENTUCKY LINES | PWRC | ||
| 4394 | RJCC | R.J. Corman Railroad Central Kentucky Lines | RSRV | ||
| 4395 | RJCC | R J CORMAN | SCAC4 | ||
| 4396 | RJCE | RAJPURA CARRIER | SCAC4 | ||
| 4397 | RJCF | R & J TRUCKING INC | SCAC4 | ||
| 4398 | RJCG | R & J CARTAGE INC | SCAC3 | ||
| 4399 | RJCG | R & J CARTAGE INC | SCAC4 | ||
| 4400 | RJCH | R J CHARTER INC | SCAC3 |