| 401 | RBOU | REEFERBOX CO | | DK | BIC |
| 402 | RBOW | RAINBOW TRANSPORTATION, INC | | | SCAC3 |
| 403 | RBOW | RAINBOW LOGISTICS LLC | | | SCAC4 |
| 404 | RBOX | TTX Co. | added 4/2000; 7/2000-7/2005 | | NAKINA |
| 405 | RBOX | American Rail Box Car Co. | added 10/1974; 1/1975; eliminated 7/1979 | | NAKINA |
| 406 | RBOX | Railbox Co. | added 7/1979; 1/1980-1/1994; eliminated 4/2000 | | NAKINA |
| 407 | RBOX | American Rail Box Car Co. | added 10/1974; 1/1975; eliminated 7/1979 | | NAKINA |
| 408 | RBOX | Railbox Co. | added 7/1979; 1/1980-1/1994; eliminated 4/2000 | | NAKINA |
| 409 | RBOX | TTX Co. | added 4/2000; 7/2000 | | NAKINA |
| 410 | RBOX | American Rail Box Car Co. | added 10/74; 1/75; eliminated 7/79 | | NRHS |
| 411 | RBOX | Railbox Co. | added 7/79; 1/80-1/94; eliminated 4/2000 | | NRHS |
| 412 | RBOX | TTX Co. | added 4/2000; 7/2000 | | NRHS |
| 413 | RBOX | TTX CO. [RAILBOX COMPANY] | | | PWRC |
| 414 | RBOX | Railbox (TTX Corporation) | | | RSRV |
| 415 | RBOX | AMERICAN RAIL BOX CAR COMPANY | | | SCAC3 |
| 416 | RBOX | TTX COMPANY | | | SCAC4 |
| 417 | RBOX | Railbox | | USA | TRAFFIC |
| 418 | RBOY | ROBINSON OIL COMPANY | | | SCAC4 |
| 419 | RBPE | R & B PROPERTIES INC | | | SCAC4 |
| 420 | RBPI | REDMAN BUILDING PRODUCTS INC | | | SCAC3 |
| 421 | RBPI | RHODES BROS PAVING INC | | | SCAC4 |
| 422 | RBPN | R N B TRANSPORT INC | | | SCAC3 |
| 423 | RBPO | ROBERTS TRANSPORT INC | | | SCAC3 |
| 424 | RBPQ | ROBERTSON, PAUL | | | SCAC3 |
| 425 | RBPR | R & B TRANSPORT INC | | | SCAC3 |
| 426 | RBPS | R B P PRODUCTS | | | SCAC4 |
| 427 | RBPT | RBP TRANS INC | | | SCAC3 |
| 428 | RBPT | RAINBOW PRINTING LTD | | | SCAC4 |
| 429 | RBPW | ROBINSON TRANSPORT AND | | | SCAC4 |
| 430 | RBPX | Mineral Processing & Marketing Inc. | added 10/2003; eliminated 1/2004; 7/2005 (not listed) | | NAKINA |
| 431 | RBPX | MINERAL PROCESSING & MARKETING INC. | | | PWRC |
| 432 | RBPX | MINERAL PROCESSING & MARKETING INC | | | SCAC4 |
| 433 | RBPZ | REDCO BEET PLANT | | | PWRC |
| 434 | RBQT | ROBERTS TRUCKING | | | SCAC3 |
| 435 | RBR | Siam Airnet Co., Ltd. | Callsign: Siam Airnet, | T | AVCODES |
| 436 | RBR | RICHMOND BELT RAILWAY | | | PWRC |
| 437 | RBRA | REDMOND, BRENT TRANSPORTATION INC | | | SCAC3 |
| 438 | RBRA | REDMOND, BRENT TRANSPORTATION INC | | | SCAC4 |
| 439 | RBRB | RBR TRANSPORTATION | | | SCAC3 |
| 440 | RBRC | ROBERTS CORP | | | SCAC3 |
| 441 | RBRC | ROBERT INC | | | SCAC4 |
| 442 | RBRE | ROBERTS, ELLIS TRUCKING INC | | | SCAC3 |
| 443 | RBRF | RIPE BROKERAGE | | | SCAC4 |
| 444 | RBRG | ROBERTS, BILLY TRUCKING INC | | | SCAC4 |
| 445 | RBRH | ROBERTS, BRYAN | | | SCAC4 |
| 446 | RBRJ | REBELLO, RICHARD J | | | SCAC3 |
| 447 | RBRK | ROSE BROTHERS TRUCKING | | | SCAC3 |
| 448 | RBRL | ROBINSON, C H COMPANY (REVERSE LOGI | | | SCAC4 |
| 449 | RBRM | RAINEY BROTHERS | | | SCAC4 |
| 450 | RBRN | R B R TRUCKING INC | | | SCAC3 |
| 451 | RBRN | R B R TRUCKING INC | | | SCAC4 |
| 452 | RBRO | RUIZ BROS | | | SCAC4 |
| 453 | RBRP | R B TRANSPORTATION | | | SCAC3 |
| 454 | RBRP | RBR LOGISTICS | | | SCAC4 |
| 455 | RBRQ | ROY BROTHERS TRANSPORTATION COMPANY | | | SCAC3 |
| 456 | RBRR | R Y JC BARRON | | | SCAC4 |
| 457 | RBRS | ROBERTS, BOB TRUCKING | | | SCAC3 |
| 458 | RBRS | RUMBLIN RED STABLES | | | SCAC4 |
| 459 | RBRV | RABBIT RIVER TRANSPORT II LLC | | | SCAC4 |
| 460 | RBRW | ROBINSON BROS WRECKING | | | SCAC3 |
| 461 | RBRX | ROSEN BEAUDIN LEASING | | | SCAC4 |
| 462 | RBRY | ROBERTSON, RANDY | | | SCAC4 |
| 463 | RBS | Reuschling Bahn und Srvice GmbH | Augsburg | D | privat-bahn.de |
| 464 | RBS | Regionalverkehr Bern-Solothurn | | CH | TRAFFIC |
| 465 | RBS | Regionalverkehr Bern-Solothurn | | CH | VKM |
| 466 | RBSA | REPSOL BUTANO S A TRANSPORTE MARITI | | | SCAC3 |
| 467 | RBSA | RBS Reuschling Bahn und Service GmbH | | DE | VKM |
| 468 | RBSAF | RBS Asset Finance Europe Limited | | UK | VKM |
| 469 | RBSB | ROBERTSON BONDED WAREHOUSE | | | SCAC3 |
| 470 | RBSB | ROBERTSON BONDED WAREHOUSE INC | | | SCAC4 |
| 471 | RBSC | RED BUS COMPANY | | | SCAC3 |
| 472 | RBSE | ROGERS NK SEED CO | | | SCAC3 |
| 473 | RBSE | ROBERTS STATION EXPRESS LLC | | | SCAC4 |
| 474 | RBSG | REED BROTHERS | | | SCAC3 |
| 475 | RBSG | ROBBINS, STEVE W TRUCKING | | | SCAC4 |
| 476 | RBSH | ROSE, B & SONS CARTAGE | | | SCAC3 |
| 477 | RBSH | Regionalbahn Schleswig-Holstein GmbH | | D | TRAFFIC |
| 478 | RBSI | ROSS, BILL AND SON TRUCKING INC | | | SCAC3 |
| 479 | RBSK | ROBERTS TRUCKING | | | SCAC3 |
| 480 | RBSK | RBS TRANSPORTATION | | | SCAC4 |
| 481 | RBSL | RED BALL STAGE LINE, INC | | | SCAC3 |
| 482 | RBSL | RED BALL STAGE LINE INC | | | SCAC4 |
| 483 | RBSM | REEDEREI BERND SIBUM GMBH & CO KG | | | SCAC4 |
| 484 | RBSN | REBA & SONS TRUCKING INC | | | SCAC4 |
| 485 | RBSO | ROBERSON TRUCKING COMPANY | | | SCAC3 |
| 486 | RBSP | R & B TRANSPORTATION INC | | | SCAC3 |
| 487 | RBSQ | ROBBIES CARTAGE INC | | | SCAC3 |
| 488 | RBSR | ROBERTSON TRUCKING INC | | | SCAC3 |
| 489 | RBSS | ROBERTSON TRANSIT INC | | | SCAC3 |
| 490 | RBST | ROBERTS & SONS TRUCKING | | | SCAC3 |
| 491 | RBST | RBS TRUCKING INC | | | SCAC4 |
| 492 | RBST | Regionalbus Stuttgart | Real: RBS | D | TRAFFIC |
| 493 | RBSU | PACIFIC INTERNATIONA LINES (PTE) LT | | | SCAC4 |
| 494 | RBSV | ROSEN BUS SERVICE INC | | | SCAC3 |
| 495 | RBSV | RITEWAY BUS SERVICE INC | | | SCAC4 |
| 496 | RBSY | ROBTRANS SYSTEMS INC | | | SCAC4 |
| 497 | RBT | Robinton Aereo, C. Por. A. | Callsign: Robin, | DOM | AVCODES |
| 498 | RBT | Air Rabat | Callsign: Air Rabat, | MA | AVCODES |
| 499 | RBT | Robinton Aero | | | ICAO1 |
| 500 | RBT | RbT Regiobahn Thüringen GmbH | | DE | VKM |
