| 5201 | RLTL | RELIABLE TRUCK LINES | SCAC3 | ||
| 5202 | RLTL | RAILTECH LTD | SCAC4 | ||
| 5203 | RLTM | ROARING LION TRANSPORT INC | SCAC4 | ||
| 5204 | RLTN | REL TRUCKING | SCAC3 | ||
| 5205 | RLTN | R & L TRUCKING OF ILLINOIS INC | SCAC4 | ||
| 5206 | RLTO | R&L TRANSPORT | SCAC3 | ||
| 5207 | RLTO | R & L TRANSPORT | SCAC4 | ||
| 5208 | RLTP | REALISTIC TRANSPORT | SCAC3 | ||
| 5209 | RLTP | R L TRANSPORT INC | SCAC4 | ||
| 5210 | RLTQ | ROYALTY TRUCKING INC | SCAC3 | ||
| 5211 | RLTR | R L TRANSPORTATION CO | SCAC3 | ||
| 5212 | RLTR | R & L TRUCKING | SCAC4 | ||
| 5213 | RLTS | REFRIGERATED LTL SERVICE INC | SCAC3 | ||
| 5214 | RLTS | REGIONAL TRANSPORT SERVICE LLC | SCAC4 | ||
| 5215 | RLTT | R L T TRUCKING | SCAC3 | ||
| 5216 | RLTV | ROBINSON, L TRANSFER & STORAGE CO I | SCAC3 | ||
| 5217 | RLTW | RELIABLE TRANSPORT INC | SCAC3 | ||
| 5218 | RLTW | RAIL TO RAIL TRANSPORT INC | SCAC4 | ||
| 5219 | RLTX | Randolph L. Johnston | 7/2000 (not listed) | NAKINA | |
| 5220 | RLTX | Randolph L. Johnston | Jul-00 | NRHS | |
| 5221 | RLTX | RANDOLPH L. JOHNSTON | PWRC | ||
| 5222 | RLTX | RANDOLPH L JOHNSON | SCAC4 | ||
| 5223 | RLTY | REALITY TRUCKING LLC | SCAC4 | ||
| 5224 | RLU | Rusline | ICAO1 | ||
| 5225 | RLUB | ROYALTON LUMBER | SCAC4 | ||
| 5226 | RLUK | R L TRUCKING | SCAC3 | ||
| 5227 | RLUK | R R L TRUCKING INC | SCAC4 | ||
| 5228 | RLUM | ROADLINK TRANSPORTATION SOLUTIONS ( | SCAC4 | ||
| 5229 | RLUP | ROADLINK TRANSPORTATION SOLUTIONS ( | SCAC4 | ||
| 5230 | RLV | Real Aviation | ICAO1 | ||
| 5231 | RLVC | RAHAL LE | SCAC4 | ||
| 5232 | RLVE | R & H TRAVEL INC | SCAC3 | ||
| 5233 | RLVI | RAIL-VAN INC | SCAC3 | ||
| 5234 | RLVL | RALEY VAN LINES INC | SCAC3 | ||
| 5235 | RLVL | R & L VENTURES LTD | SCAC4 | ||
| 5236 | RLVT | R L V TRUCKING | SCAC3 | ||
| 5237 | RLWE | RAILWAY EXPRESS INC | SCAC3 | ||
| 5238 | RLWI | R L T | SCAC3 | ||
| 5239 | RLWI | RL WOOD INC | SCAC4 | ||
| 5240 | RLWL | ROLLING WHEEL TRANSPORT, INC | SCAC3 | ||
| 5241 | RLWL | ROLLING WHEEL TRANSPORT INC | SCAC4 | ||
| 5242 | RLWS | ROYAL WEST TOURS & CRUISES INC | SCAC3 | ||
| 5243 | RLX | Richardson Lubricating Co. | 7/1932 | NAKINA | |
| 5244 | RLX | RICHARDSON LUBRICATING CO. | PWRC | ||
| 5245 | RLXC | RED LINE EXPRESS LLC | SCAC4 | ||
| 5246 | RLXD | RETAIL EXPRESS DELIVERY INC | SCAC4 | ||
| 5247 | RLXE | RAIL EXPRESS INC | SCAC3 | ||
| 5248 | RLXG | RED LINE EXPRESS | SCAC3 | ||
| 5249 | RLXG | RITE LOGISTIX INC | SCAC4 | ||
| 5250 | RLXI | RAIL EXPRESS INC | SCAC3 | ||
| 5251 | RLXL | REAL - TRANS LLC | SCAC4 | ||
| 5252 | RLXP | RELIABLE EXPRESS INC | SCAC3 | ||
| 5253 | RLXR | R & L EXPRESS TRUCKING CORP | SCAC3 | ||
| 5254 | RLXS | RELIABLE EXPRESS | SCAC3 | ||
| 5255 | RLYA | ROSE, LYNN TRUCKING | SCAC4 | ||
| 5256 | RLYB | RILEY BROTHERS | SCAC3 | ||
| 5257 | RLYC | RILEY'S CARDINAL TRANSPORT, INC | SCAC3 | ||
| 5258 | RLYC | RILEYS CARDINAL TRANSPORT INC | SCAC4 | ||
| 5259 | RLYD | REILLY, DON INC | SCAC3 | ||
| 5260 | RLYG | RILEY, GEORGE M TRUCKING CO | SCAC3 | ||
| 5261 | RLYG | RALLY LOGISTICS INC | SCAC4 | ||
| 5262 | RLYI | RILEY TRUCKING SYSTEMS INC | SCAC3 | ||
| 5263 | RLYJ | RILEY, JACK | SCAC3 | ||
| 5264 | RLYK | RILEY, FRANK D TRUCKING | SCAC3 | ||
| 5265 | RLYO | RILEY OIL COMPANY INC | SCAC4 | ||
| 5266 | RLYR | RALLY TRANSPORT | SCAC4 | ||
| 5267 | RLYS | R & L MAY STEAMSHIP AGENCY, INC. | SCAC3 | ||
| 5268 | RLYT | RILEY, FRED TRANSPORT | SCAC3 | ||
| 5269 | RLZ | Air Alize | ICAO1 | ||
| 5270 | RLZE | ROADLINE 08 | SCAC4 | ||
| 5271 | RLZT | ROJAS, LOPEZ TRUCKING | SCAC4 | ||
| 5272 | RM | I | TRAFFIC | ||
| 5273 | RM | Rallarmålarna AB | SE | VKM | |
| 5274 | RMA | Rocky Mountain Airways | ICAO1 | ||
| 5275 | RMAA | RAMZA INC | SCAC4 | ||
| 5276 | RMAB | RODRIGUEZ, M TRANSPORTATION | SCAC4 | ||
| 5277 | RMAC | ROMA CORPORATION | SCAC3 | ||
| 5278 | RMAG | ROLAND MARKETING | SCAC4 | ||
| 5279 | RMAH | R & M TRANSPORT INC | SCAC4 | ||
| 5280 | RMAI | ROSS MACHINE & IRON WORKS INC | SCAC4 | ||
| 5281 | RMAJ | RODRIGUEZ, MIGUEL ANGEL | SCAC4 | ||
| 5282 | RMAK | ROMA TRANSPORT INC | SCAC3 | ||
| 5283 | RMAL | REYES, MARIVEL | SCAC4 | ||
| 5284 | RMAN | ROMANS TRANSPORTATION INC | SCAC3 | ||
| 5285 | RMAN | RAMAN TRUCKING | SCAC4 | ||
| 5286 | RMAQ | ROMA FOOD ENTERPRISES | SCAC3 | ||
| 5287 | RMAQ | ROMA FOOD ENTERPRISES INC (VISTAR C | SCAC4 | ||
| 5288 | RMAR | RAILMAR AGENCY LTD, s.r.o. | CZ | VKM | |
| 5289 | RMAS | RAMIREZ & SONS | SCAC3 | ||
| 5290 | RMAT | ROMA TRANSPORT SERVICE INC | SCAC3 | ||
| 5291 | RMAV | R M I GLOBAL LOGISTICS INC | SCAC4 | ||
| 5292 | RMAW | REM MARITIME AS | SCAC4 | ||
| 5293 | RMAX | Rocky Mountain Rail Society | 7/2000-7/2005 (not listed) | NAKINA | |
| 5294 | RMAX | American Refrigerator Transit Co. | added 4/1956; 10/1957-4/1970; eliminated 4/1974; 1/1975-1/1980 | NAKINA | |
| 5295 | RMAX | American Refrigerator Transit Co. | 10/57-4/70; eliminated 4/74; 1/75-1/80 | NRHS | |
| 5296 | RMAX | Rocky Mountain Rail Society | Jul-00 | NRHS | |
| 5297 | RMAX | *AMERICAN REFRIGERATOR TRANSIT CO. | PWRC | ||
| 5298 | RMAX | +ROCKY MOUNTAIN RAIL SOCIETY | PWRC | ||
| 5299 | RMAX | Rocky Mountain Rail Society | RSRV | ||
| 5300 | RMAX | ROCKY MOUNTAIN RAIL SOCIETY | SCAC4 |