| 301 | RAKS | RAGGED ASS TRUCKING & SALVAGE LTD | | | SCAC4 |
| 302 | RAKT | RAK TRANSPORTATION INC | | | SCAC4 |
| 303 | RAKW | RASTALL, K W OIL CO | | | SCAC4 |
| 304 | RAL | Roswell Airlines | Callsign: Roswell, | USA | AVCODES |
| 305 | RAL | Roswell Airlines | | | ICAO1 |
| 306 | RAL | RED ARROW LINE | | | PWRC |
| 307 | RAL | Rent-a-Lok GbR | | DE | VKM |
| 308 | RALA | R A LEASING INC | | | SCAC3 |
| 309 | RALD | RANDALL DISTRIBUTING INC | | | SCAC3 |
| 310 | RALD | R & L DEVELOPMENT COMPANY | | | SCAC4 |
| 311 | RALE | RAY-LEE TRANSPORTATION INC | | | SCAC3 |
| 312 | RALF | RALEIGH FURNITURE STORAGE CO INC | | | SCAC3 |
| 313 | RALG | RAVAN LEASING | | | SCAC3 |
| 314 | RALI | RAIL LINK TRUCKING CO INC | | | SCAC3 |
| 315 | RALJ | RAYL, J INC | | | SCAC4 |
| 316 | RALM | RALCO INC | | | SCAC3 |
| 317 | RALM | RAIDER LTD | | | SCAC4 |
| 318 | RALN | RALEIGH LINES INCORPORATED | | | SCAC3 |
| 319 | RALO | ROLLS AROUND TOWN LIMOUSINE | | | SCAC3 |
| 320 | RALP | RANDOLPHS INC | | | SCAC3 |
| 321 | RALP | RANDOLPHS INC | | | SCAC4 |
| 322 | RALP | RegionAlps | | CH | TRAFFIC |
| 323 | RALP | Ralpin AG | | CH | VKM |
| 324 | RALPIN | RAlpin AG | | CH | TRAFFIC |
| 325 | RALQ | RANDALL TRUCKING & LEASING INC | | | SCAC3 |
| 326 | RALR | RTA AUTOMOTIVE LTD | | | SCAC4 |
| 327 | RALS | RALSTON, WILLIAM P | | | SCAC3 |
| 328 | RALS | RALSTONS COURIER | | | SCAC4 |
| 329 | RALT | R & L TRUCKING CO INC | | | SCAC3 |
| 330 | RALT | R & L TRUCKING CO INC | | | SCAC4 |
| 331 | RALU | ROYAL ARCTIC LINE A/S | | GRO | BIC |
| 332 | RALU | ROYAL ARCTIC LINE A/S | | | SCAC4 |
| 333 | RALV | RA-LY TRANSPORTS LLC | | | SCAC4 |
| 334 | RALW | RALL & LEEDS WAREHOUSE | | | SCAC3 |
| 335 | RALX | Radnor Rail, Ltd. | 7/2005 (not listed) | | NAKINA |
| 336 | RALX | RADNOR RAIL, LTD. | | | PWRC |
| 337 | RALX | Radnor Rail Limited | | | RSRV |
| 338 | RALX | RADNOR RAIL LTD | | | SCAC4 |
| 339 | RALY | RALEY TRUCKING | | | SCAC3 |
| 340 | RALY | RALLY TRANSPORT LTD | | | SCAC4 |
| 341 | RALZ | RALSTON PURINA COMPANY | | | PWRC |
| 342 | RAM | Royal Air Maroc | IATA: AT, Callsign: Royalair Maroc, IATA Prefix: 147, | MA | AVCODES |
| 343 | RAM | Royal Air Maroc | IATA: AT | | ICAO1 |
| 344 | RAMA | London Cityrama | | GB | TRAFFIC |
| 345 | RAMB | RAMBLER INC | | | SCAC3 |
| 346 | RAMB | RAMBLIN EXPRESS INC | | | SCAC4 |
| 347 | RAMC | RAM MOTOR EXPRESS INC | | | SCAC3 |
| 348 | RAMC | RAM CRUCES INTERNACIONALES | | | SCAC4 |
| 349 | RAMD | R & M DELIVERY SERVICE | | | SCAC3 |
| 350 | RAME | RAM EXPRESS INC | | | SCAC3 |
| 351 | RAME | RAM SPECIALIZED CARRIERS INC | | | SCAC4 |
| 352 | RAMF | RAM FREIGHT LINES, INC | | | SCAC3 |
| 353 | RAMF | RAM FOREST GROUP INC | | | SCAC4 |
| 354 | RAMG | RAM TRUCKING & RIGGING INC | | | SCAC4 |
| 355 | RAMH | RAMSEY LUMBER CO INC | | | SCAC3 |
| 356 | RAMH | RAMSEY LUMBER CO INC | | | SCAC4 |
| 357 | RAMI | R A M TRUCKING | | | SCAC4 |
| 358 | RAMJ | RAM CONSTRUCTION CO LTD | | | SCAC4 |
| 359 | RAMK | RAMSEY, K S TRUCKING | | | SCAC3 |
| 360 | RAMM | RAMSEYS TRANSFER | | | SCAC3 |
| 361 | RAMM | R A M EXPRESS LLC | | | SCAC4 |
| 362 | RAMN | RAM INC | | | SCAC4 |
| 363 | RAMO | RAMOS TRUCKING | | | SCAC3 |
| 364 | RAMO | RAMOS TRUCKING | | | SCAC4 |
| 365 | RAMP | R A M TRANSIT LINES INC | | | SCAC4 |
| 366 | RAMQ | RAMIREZ TRUCKING CO | | | SCAC3 |
| 367 | RAMQ | RAMIREZ TRUCKING CO | | | SCAC4 |
| 368 | RAMR | RAEMARC INC | | | SCAC3 |
| 369 | RAMR | RAMBLIN ROSE TRANSPORT INC | | | SCAC4 |
| 370 | RAMT | RAYMOND MOTOR TRANSPORT INC | | | PWRC |
| 371 | RAMT | RAM TRANS INC | | | SCAC3 |
| 372 | RAMU | RANI SERVICES SA | | | SCAC4 |
| 373 | RAMV | RANSLER MOVING & STORAGE CO | | | SCAC3 |
| 374 | RAMV | R A M VAN BODIES | | | SCAC4 |
| 375 | RAMW | RAMAR WHSE & TRANSP | | | SCAC3 |
| 376 | RAMW | RAM INDUSTRIES INC | | | SCAC4 |
| 377 | RAMX | Rail Merchants International | 7/2005 (not listed) | | NAKINA |
| 378 | RAMX | Rail America, Ltd. | added 7/1982; eliminated 1/1984; 1/1994 (not listed) | | NAKINA |
| 379 | RAMX | Railway Automated Machinery Co. | added 7/1967; 4/1970; eliminated 1/1971 | | NAKINA |
| 380 | RAMX | Railway Automated Machinery Co. | added 7/67; 4/70; eliminated 1/71 | | NRHS |
| 381 | RAMX | Rail America, Ltd. | added 7/82; 1/94 | | NRHS |
| 382 | RAMX | *RAILWAY AUTOMATED MACHINERY CO. | | | PWRC |
| 383 | RAMX | +RAIL MERCHANTS INTERNATIONAL [RAILAMERICA, LTD.] | | | PWRC |
| 384 | RAMX | Rail America (Genessee & Wyoming) | | | RSRV |
| 385 | RAMX | RAIL MERCHANTS INTERNATIONAL | | | SCAC4 |
| 386 | RAMY | RAMSEY TRUCKING INC | | | SCAC3 |
| 387 | RAMZ | (REAZ) RETIRED 04-06-94 ATP (ACI 2512) | | | PWRC |
| 388 | RAN | Renan Ltd. | Callsign: Renan, | MD | AVCODES |
| 389 | RAN | Ransome Air, Inc. | Callsign: Ransome, | USA | AVCODES |
| 390 | RAN | Rano Air Limited | Callsign: Rano Air, | WAN | AVCODES |
| 391 | RAN | Renan | | | ICAO1 |
| 392 | RAN | Railservice Alexander Neubauer GmbH | Karlsruhe | D | privat-bahn.de |
| 393 | RAN | Railservice Alexander Neubauer | | DE | VKM |
| 394 | RANC | RANGEN INC | | | SCAC4 |
| 395 | RAND | RAND EXPRESS FREIGHT LINES INC | | | PWRC |
| 396 | RAND | RANDALL, W R INC | | | SCAC4 |
| 397 | RANE | RANCHER TRUCKING | | | SCAC4 |
| 398 | RANF | RANDY INTERNATIONAL LTD | | | SCAC3 |
| 399 | RANH | RANCAS ELIVERY SERVICE INC | | | SCAC3 |
| 400 | RANH | RANCHO HERMANOS SANCHEZ | | | SCAC4 |
