| 301 | RDMI | ROADMASTER INC | | | SCAC3 |
| 302 | RDMI | RUSKIN DE MEXICO SA DE CV | | | SCAC4 |
| 303 | RDMJ | ROADMASTER INC | | | SCAC3 |
| 304 | RDMK | REDMOND TRUCKING COMPANY | | | SCAC3 |
| 305 | RDML | ROOD, MYKEL L INC | | | SCAC3 |
| 306 | RDML | R S M ACRES LTD | | | SCAC4 |
| 307 | RDMM | REDS MESSENGER & MOVING | | | SCAC3 |
| 308 | RDMN | R E D MOVING & STORAGE CO | | | SCAC3 |
| 309 | RDMO | RED MOUNTAIN TRANSPORTATION COMPANY | | | SCAC3 |
| 310 | RDMP | R D M ENTERPRISES INC | | | SCAC3 |
| 311 | RDMQ | REDMOND TRUCKING CO | | | SCAC3 |
| 312 | RDMR | RDM TRANSPORTATION INC | | | SCAC4 |
| 313 | RDMS | ROADMASTERS INC | | | SCAC3 |
| 314 | RDMS | READS MOVING SYSTEMS INC | | | SCAC4 |
| 315 | RDMT | R-D MOTOR, INC | | | SCAC3 |
| 316 | RDMT | RECUPERADORA DE METALES APC | | | SCAC4 |
| 317 | RDMU | RODYMAR SHIPPING CO | | ET | BIC |
| 318 | RDMV | ROYTEC DE MEXICO SA DE CV | | | SCAC4 |
| 319 | RDMX | RYDER | | | PWRC |
| 320 | RDMZ | TRANSAMERICA LEASING INC [(REAZ) DETROIT & MACKINAC] | | | PWRC |
| 321 | RDMZ | TAL International | | | RSRV |
| 322 | RDMZ | TRANSAMERICA LEASING INC | | | SCAC4 |
| 323 | RDN | Dinar Lineas Aereas, S.A. | IATA: D7, Callsign: Aero Dinar, IATA Prefix: 429, Ceased operations on 30 September 2002. | RA | AVCODES |
| 324 | RDN | Red Barn Operations | Callsign: Red Barn, | USA | AVCODES |
| 325 | RDN | Dinar | IATA: D7 | | ICAO1 |
| 326 | RDNA | RICHARDSON AUTO TRANSIT | | | SCAC3 |
| 327 | RDNA | RODAN TRANSPORTATION | | | SCAC4 |
| 328 | RDNB | REDLINE TRANSPORTATION | | | SCAC4 |
| 329 | RDNC | RODON AMARANDON SPECIAL MARITIME EN | | | SCAC4 |
| 330 | RDND | ROADRUNNER DELIVERY INC | | | SCAC4 |
| 331 | RDNE | RUSSELL DRAYAGE & EXPRESS | | | SCAC3 |
| 332 | RDNE | RAIDIN EXPRESS | | | SCAC4 |
| 333 | RDNI | RIEDLINGER INC | | | SCAC3 |
| 334 | RDNJ | RADNEY, J R | | | SCAC3 |
| 335 | RDNK | RICHARDSON TRUCKING INC | | | SCAC3 |
| 336 | RDNK | REDNECK EXPRESS INC | | | SCAC4 |
| 337 | RDNL | ROADRUNNER LEASING INC | | | SCAC3 |
| 338 | RDNL | RAPIDOS DE NUEVO LAREDO S A DE C V | | | SCAC4 |
| 339 | RDNM | ROYAL DESIGN & MANUFACTURING INC | | | SCAC3 |
| 340 | RDNN | ROADRUNNER TOWING & RECOVERY INC | | | SCAC3 |
| 341 | RDNP | RED D TRANSPORT | | | SCAC4 |
| 342 | RDNQ | RODDEN CO | | | SCAC3 |
| 343 | RDNR | REYNOLDS, DANNY & ROGER TRUCKING IN | | | SCAC3 |
| 344 | RDNS | RADEN, G & SONS INC | | | SCAC3 |
| 345 | RDNT | RARDEN, JOE TRUCKING | | | SCAC3 |
| 346 | RDNT | ROADNET LOGISTICS INC | | | SCAC4 |
| 347 | RDNV | RADIAN SERVICES | | | SCAC4 |
| 348 | RDNY | RICHARDS, DENNY | | | SCAC3 |
| 349 | RDO | Air Dominicana S.A. | IATA: 6D, Callsign: Air Dom, | DOM | AVCODES |
| 350 | RDO | Air Dominicana S.A. | IATA: ED, Callsign: Air Dom, Founded in 2008. Ceased operations during 2009. | DOM | AVCODES |
| 351 | RDOB | RICE, DONALD B TIRE CO INC | | | SCAC4 |
| 352 | RDOC | RADIO CAB COMPANY | | | SCAC3 |
| 353 | RDOD | RAY, DON DRIVE-A-WAY COMPANY OF IND | | | SCAC3 |
| 354 | RDOE | RENDO EXPRESS INC | | | SCAC3 |
| 355 | RDOI | ROADCO INC | | | SCAC3 |
| 356 | RDOI | RED DOOR OIL | | | SCAC4 |
| 357 | RDOL | RIDOL INC | | | SCAC3 |
| 358 | RDON | RIDE-ON-TRANSPORT | | | SCAC3 |
| 359 | RDOR | R & D TRANSPORT INC | | | SCAC4 |
| 360 | RDOS | RIDEOUTS SERVICE | | | SCAC3 |
| 361 | RDOT | RHODE ISLAND DEPT. OF TRANSPORTATION | | | PWRC |
| 362 | RDOT | ROUND, DON TRUCKING LLC | | | SCAC4 |
| 363 | RDOV | ROSE, DON OIL CO INC | | | SCAC4 |
| 364 | RDP | S.C. Rompetrol Logistics, S.A. | Callsign: Jet-Arrow, Name changed to S.C. Euroject Romania S.A. | RO | AVCODES |
| 365 | RDP | S.C. Euroject Romania S.A. | Callsign: Jet-Arrow, Name changed from S.C. Rompetrol Logistics, S.A. | RO | AVCODES |
| 366 | RDP | Eurojet Romania | | | ICAO1 |
| 367 | RDPA | R & D TRANSPORTATION CO | | | SCAC4 |
| 368 | RDPC | RDS PARCEL INC | | | SCAC3 |
| 369 | RDPF | REEDEREIGRUPPE FREESE | | | SCAC4 |
| 370 | RDPG | R & D PERFORMANCENTER LTD | | | SCAC4 |
| 371 | RDPH | RED PHOENIX INC | | | SCAC4 |
| 372 | RDPI | REED TRANSPORT INC | | | SCAC3 |
| 373 | RDPK | R D P TRUCKING | | | SCAC4 |
| 374 | RDPL | ROSEN, DON PREFERRED LIMOUSINE INC | | | SCAC3 |
| 375 | RDPM | REID PETROLEUM CORP | | | SCAC4 |
| 376 | RDPO | ROAD TRANSPORT INC | | | SCAC4 |
| 377 | RDQB | RIPE DU QUEBEC INC | | | SCAC3 |
| 378 | RDQS | RICHARDS DELIVERY SERVICE | | | SCAC3 |
| 379 | RDQT | REEDS TRUCKING | | | SCAC3 |
| 380 | RDR | Goodridge (UK) Ltd. | Callsign: Red Star, | GB | AVCODES |
| 381 | RDR | Goodridge (UK) Limited | | | ICAO1 |
| 382 | RDRB | RED RIVER BARGE LINE INC | | | SCAC3 |
| 383 | RDRD | ROAD RUNNER DELIVERY SERVICE | | | SCAC3 |
| 384 | RDRD | ROAD RIDER TRANSPORT LTD | | | SCAC4 |
| 385 | RDRE | ROADREADY TRANSFER SERVICE INC | | | SCAC3 |
| 386 | RDRE | ROADREADY TRANSFER SERVICE INC | | | SCAC4 |
| 387 | RDRF | RADEL, RICHARD F | | | SCAC3 |
| 388 | RDRF | RADER FARMS INC | | | SCAC4 |
| 389 | RDRH | RIDE THE RIDE EXPRESS LLC | | | SCAC4 |
| 390 | RDRI | ROAD & RUNWAY | | | SCAC3 |
| 391 | RDRK | RED ROCK PETROLEUM COMPANY | | | SCAC3 |
| 392 | RDRK | RED ROCK TRANSPORTATION COMPANY | | | SCAC4 |
| 393 | RDRL | RD-RAIL TRANS EMPIRE ST | | | SCAC3 |
| 394 | RDRM | ROADRUNNER MOTOR FREIGHT | | | SCAC3 |
| 395 | RDRM | ROUILLARD REMORQUAGE INC | | | SCAC4 |
| 396 | RDRN | RED ROOSTER BEVERAGE INC | | | SCAC4 |
| 397 | RDRO | RADER, ROGER INC | | | SCAC3 |
| 398 | RDRP | RED RIVER TRANSPORT INC | | | SCAC3 |
| 399 | RDRQ | ROAD RUNNER TOURS INC | | | SCAC3 |
| 400 | RDRQ | RDR LLC | | | SCAC4 |
