| 401 | RMRS | RAMAPO ROADWAY SERVICES CO INC | | | SCAC3 |
| 402 | RMRT | RAMROD TRUCKING INC | | | SCAC3 |
| 403 | RMRW | ROCKY MOUNTAIN RECREATION TOURS (20 | | | SCAC4 |
| 404 | RMRX | Rocky Mountain Railtours | 7/2005 (not listed) | | NAKINA |
| 405 | RMRX | ROCKY MOUNTAIN RAILTOURS | | | PWRC |
| 406 | RMRX | Rocky Mountaineer | | | RSRV |
| 407 | RMRX | Rocky Mountaineer Railtours | | USA | TRAFFIC |
| 408 | RMS | TAS Aviation, Inc. | Callsign: Tass Air, | USA | AVCODES |
| 409 | RMS | Tas Aviation | | | ICAO1 |
| 410 | RMS | RESERVED JJM | | | PWRC |
| 411 | RMSB | ROMSBURG, GENE ENTERPRISES | | | SCAC3 |
| 412 | RMSB | ROAD MASTER TRANSPORT BROKERAGE LP | | | SCAC4 |
| 413 | RMSD | R & M SERVICE COMPANY/SPECIAL DISTR | | | SCAC3 |
| 414 | RMSG | RIETH MOVING & STORAGE INC | | | SCAC3 |
| 415 | RMSG | RENAISSA | | | SCAC4 |
| 416 | RMSH | RMS | | | SCAC3 |
| 417 | RMSH | ROOMSTORE, THE | | | SCAC4 |
| 418 | RMSI | RUSS'S MOTOR SERVICE INC | | | SCAC3 |
| 419 | RMSI | RUSS'S MOTOR SERVICE INC | | | SCAC4 |
| 420 | RMSJ | RMS | | | SCAC4 |
| 421 | RMSK | RIMOUSKI TRANSPORT LIMITEE (DIV OF | | | SCAC3 |
| 422 | RMSL | RAM SERVICES | | | SCAC3 |
| 423 | RMSM | R & M STEEL COMPANY | | | SCAC3 |
| 424 | RMSN | RAMOS TRUCKING | | | SCAC4 |
| 425 | RMSO | RICHARDS MOVING & STORAGE INC | | | SCAC3 |
| 426 | RMSO | RIMSCO | | | SCAC4 |
| 427 | RMSP | RAMSEY TRANSPORT | | | SCAC3 |
| 428 | RMSP | REYNOLDS, | | | SCAC4 |
| 429 | RMSQ | ROSKIN, H., MOTOR SERVICE, INC | | | SCAC3 |
| 430 | RMSR | RABBIT MESSENGER | | | SCAC3 |
| 431 | RMSR | R & M COURIER SERVICES INC | | | SCAC4 |
| 432 | RMSS | RMS SERVICE | | | SCAC3 |
| 433 | RMST | ROADMASTERS TRANSPORT CO LP | | | SCAC4 |
| 434 | RMSU | TRANSPORTS F.RAMOS,S.L | | E | BIC |
| 435 | RMSU | R M S EUROPA GMBH | | | SCAC3 |
| 436 | RMSW | RAMSEY FARM | | | SCAC4 |
| 437 | RMSX | Harsco Track Technologies | 7/2000-7/2005 (not listed) | | NAKINA |
| 438 | RMSX | Pandrol Jackson, Inc. | 1/1994 (not listed) | | NAKINA |
| 439 | RMSX | Pandrol Jackson, Inc. | Jan-94 | | NRHS |
| 440 | RMSX | Harsco Track Technologies | Jul-00 | | NRHS |
| 441 | RMSX | *PANDROL JACKSON, INC | | | PWRC |
| 442 | RMSX | +HARSCO TRACK TECHNOLOGIES | | | PWRC |
| 443 | RMSX | Harsco Track Technologies | | | RSRV |
| 444 | RMSX | HARSCO TRACK TECHNOLOGIES | | | SCAC4 |
| 445 | RMSX | Harsco Track Technologies | | USA | TRAFFIC |
| 446 | RMSY | RAM SECURITY INC | | | SCAC3 |
| 447 | RMT | RAM Aircraft Corpration | Callsign: Ram Flight, | USA | AVCODES |
| 448 | RMT | Ram Aircraft Corporation | | | ICAO1 |
| 449 | RMTC | ROCKY MOUNTAIN TRUCKING II LLC | | | SCAC4 |
| 450 | RMTD | ROCKY MOUNTAIN SUPPLY INC | | | SCAC3 |
| 451 | RMTE | ROCKY MOUNTAIN TRUCKING LLC | | | SCAC4 |
| 452 | RMTF | RINOMATO FINANCIERA S A (PANAMA) | | | SCAC4 |
| 453 | RMTG | R & M TRUCKING INC | | | SCAC3 |
| 454 | RMTH | ROCKY MOUNTAIN HOME TRANSPORTATION | | | SCAC3 |
| 455 | RMTI | RALPHS MOTOR SERVICE INC | | | SCAC3 |
| 456 | RMTI | R & M TRUCKING | | | SCAC4 |
| 457 | RMTJ | RM TRANSPORT INC | | | SCAC4 |
| 458 | RMTK | RAM TRUCKING, INC | | | SCAC3 |
| 459 | RMTK | RAM TRUCKING INC | | | SCAC4 |
| 460 | RMTL | RAM TRUCK LINES INC | | | SCAC3 |
| 461 | RMTL | ROSEMAN TRANSPORT LTD | | | SCAC4 |
| 462 | RMTM | R&M TRUCKING, Robert J. May, INC | | | SCAC3 |
| 463 | RMTM | R & M FREIGHT INC (RAIL DIVISION) | | | SCAC4 |
| 464 | RMTO | R & M TRUCKIN OIL CO | | | SCAC3 |
| 465 | RMTO | RAM TRANSPORTATION INC | | | SCAC4 |
| 466 | RMTQ | R M T TRUCKING INC | | | SCAC4 |
| 467 | RMTS | ROCKY MOUNTAIN TS | | | SCAC3 |
| 468 | RMTT | ROMAN TRANSPORTATION | | | SCAC3 |
| 469 | RMTU | R.M.I. CHEMICAL LOGISTICS BV | | NL | BIC |
| 470 | RMTU | R M I INTERNATIONAL BV | | | SCAC4 |
| 471 | RMTV | RAMM TRANSPORT INC | | | SCAC3 |
| 472 | RMTV | RAM TRANSPORTATION SERVICES | | | SCAC4 |
| 473 | RMTW | R & M TRUCKING CO | | | SCAC3 |
| 474 | RMTW | R M TRANSPORTS | | | SCAC4 |
| 475 | RMTY | RASMUSEN, MIKE TRUCKING | | | SCAC4 |
| 476 | RMU | C.S.P., Societe | Callsign: Air-Maur, | RIM | AVCODES |
| 477 | RMU | C.S.P., Societe | | | ICAO1 |
| 478 | RMUD | ROMULUS DEVELOPMENT CORP | | | SCAC3 |
| 479 | RMUT | ROCKY MOUNTAIN TANK COMPANY | | | SCAC3 |
| 480 | RMV | Romanian Aviation Company ROMAVIA R.A. | IATA: WQ, Callsign: Aeromavia, IATA Prefix: 534, Designator WQ reinstated by IATA. Declared bankrupt and ceased operations in August 2014. | RO | AVCODES |
| 481 | RMV | Romavia | | | ICAO1 |
| 482 | RMV | Rhein-Main-Verkehrsverbund | | D | TRAFFIC |
| 483 | RMVA | REFRIGERADOS MONTERREY VALLE SA DE | | | SCAC4 |
| 484 | RMVE | RICKS MOVING & EXPRESS | | | SCAC3 |
| 485 | RMVG | RAMAR MOVING SYSTEMS INC | | | SCAC3 |
| 486 | RMVG | RAMAR MOVING SYSTEMS INC | | | SCAC4 |
| 487 | RMVI | RICHS MOVING SERVICES | | | SCAC3 |
| 488 | RMVL | RAPID MOVEMENT LTD | | | SCAC3 |
| 489 | RMVN | RICHARDS MOVING & STORAGE INC | | | SCAC4 |
| 490 | RMVQ | RMV TRUCKING COMPANY | | | SCAC3 |
| 491 | RMVR | ROE MOVERS | | | SCAC3 |
| 492 | RMVS | RANDOLPH TRANSPORTATION INC | | | SCAC3 |
| 493 | RMVS | RANDOLPH TRANSPORTATION INC | | | SCAC4 |
| 494 | RMWC | RANGE, MELVIN W INC | | | SCAC4 |
| 495 | RMWI | R M W INC | | | SCAC3 |
| 496 | RMWN | RELOCATION MANAGEMENT WORLDWIDE INC | | | SCAC4 |
| 497 | RMWQ | RM WAREHOUSE | | | SCAC3 |
| 498 | RMWS | ROOSEVELT, M W & SON INC | | | SCAC3 |
| 499 | RMWT | ROGERS, M & W TRUCKING | | | SCAC3 |
| 500 | RMX | Air Max Ltd. | Callsign: Aeromax, Ceased Operations. | BG | AVCODES |
