| 501 | RAS | Jim Ratliff Air Service | | | ICAO1 |
| 502 | RASA | RAI, A S TRANSPORT LTD | | | SCAC4 |
| 503 | RASB | R & S BROKERAGE COMPANY | | | SCAC3 |
| 504 | RASC | RALEIGH SHIPPING CORPORATION | | | SCAC3 |
| 505 | RASD | R A S K L D EXPRESS | | | SCAC3 |
| 506 | RASD | R & S LOGISTICS INC | | | SCAC4 |
| 507 | RASE | RJ AND SONS LLC | | | SCAC4 |
| 508 | RASG | RASMUSSE | | | SCAC4 |
| 509 | RASH | RASH OIL & FEED COMPANY | | | SCAC4 |
| 510 | RASI | RASCO & SONS AUTO TRNASPORT INC | | | SCAC3 |
| 511 | RASI | RANCHO AGRICOLA SANTA MONICA S DE R | | | SCAC4 |
| 512 | RASJ | R AND S PRODUCE TRANSPORT LLC | | | SCAC4 |
| 513 | RASK | RASK TRANSPORTATION INC | | | SCAC3 |
| 514 | RASK | RASK | | | SCAC4 |
| 515 | RASL | R&S TRANSPORTATION&LOGISTICS, INC | | | SCAC3 |
| 516 | RASM | R A S PROFESSIONAL CARGO SERVICES | | | SCAC3 |
| 517 | RASM | RAMIREZ SCRAP METALS | | | SCAC4 |
| 518 | RASN | RASMUSSEN ENTERPRISES INC | | | SCAC3 |
| 519 | RASO | R-S-K TRUCK LINES | | | SCAC3 |
| 520 | RASP | REAMES AND SON CONSTRUCTION COMPANY | | | SCAC4 |
| 521 | RASQ | R & S TRUCKING | | | SCAC3 |
| 522 | RASQ | R & S TRUCKING | | | SCAC4 |
| 523 | RASR | RASMUSSEN, ROBERT | | | SCAC3 |
| 524 | RASR | ROTTERDAM AGENCY SERVICES B V | | | SCAC4 |
| 525 | RASS | ROBBEN, AUGUST SONS INC | | | SCAC3 |
| 526 | RAST | R & S TRUCK CO | | | SCAC3 |
| 527 | RASV | RM AUTOMATIZACION SA DE CV | | | SCAC4 |
| 528 | RASW | REGIONAL AUTO SALES | | | SCAC4 |
| 529 | RASX | C.A. Rasmussen | 7/2000-7/2005 (not listed) | | NAKINA |
| 530 | RASX | C.A. Rasmussen | Jul-00 | | NRHS |
| 531 | RASX | *RAIL SERVE | | | PWRC |
| 532 | RASX | +C. A. RASMUSSEN | | | PWRC |
| 533 | RASX | C.A. Rasmussen | | | RSRV |
| 534 | RASX | C A | | | SCAC4 |
| 535 | RAT | Ratioflug Luftfahfitunternehmen GmbH | | D | AVCODES |
| 536 | RAT | Chief Rat Flight Services (PTY) Ltd. | Callsign: Riverrat, | ZA | AVCODES |
| 537 | RAT | Rainbow Airlines (Private) Limited | IATA: RT, Callsign: Raindrop, Planned to commence operation on 25 January 2017. | ZW | AVCODES |
| 538 | RAT | Chief Rat Flight Services | | | ICAO1 |
| 539 | RAT | | City: Craiova | RO | TRAFFIC |
| 540 | RAT | Rent A Train GmbH | | DE | VKM |
| 541 | RATA | RAPID TRANSIT INC | | | SCAC3 |
| 542 | RATB | RATLIFF BROS AND CO | | | SCAC3 |
| 543 | RATB | ROADSIDE AUTO & TRUCK TRANSPORT INC | | | SCAC4 |
| 544 | RATB | Regia Autonomă de Transport București | City: Bucharest | RO | TRAFFIC |
| 545 | RATC | RATA ASSOCIATES INC | | | SCAC3 |
| 546 | RATC | R & A TRUCKING INC | | | SCAC4 |
| 547 | RATC | Royal Army Transport Corps | | | TRAFFIC |
| 548 | RATD | RAMPANT DEVELOPMENT CORPORATION | | | SCAC3 |
| 549 | RATD | RATD INC | | | SCAC4 |
| 550 | RATE | RAIL-TRAIL CO | | | SCAC3 |
| 551 | RATE | RATEP RENOVATIONS INC | | | SCAC4 |
| 552 | RATF | ROULOTTES ACADIE TRAILERS INC | | | SCAC4 |
| 553 | RATG | RAYNORS TRUCKING INC | | | SCAC3 |
| 554 | RATH | R & A TRANSPORT | | | SCAC4 |
| 555 | RATI | RAPID AIR TRUCK INC | | | SCAC3 |
| 556 | RATI | RITAS ABSOLUTE TRUCKING INC | | | SCAC4 |
| 557 | RATK | RANGER TRUCK INC | | | SCAC3 |
| 558 | RATK | RAT | | | SCAC4 |
| 559 | RATL | RAMUS TRUCKING LINE INC | | | PWRC |
| 560 | RATL | RAMUS TRUCKING LINE, INC | | | SCAC3 |
| 561 | RATL | R & A TRANSPORTATION LOGISTICS | | | SCAC4 |
| 562 | RATM | RATLEYS MOBILE HOME SALES | | | SCAC3 |
| 563 | RATM | R A TRANSPORT INC | | | SCAC4 |
| 564 | RATN | RATLIFF TRUCKING CORPORATION INC | | | SCAC3 |
| 565 | RATN | ROBINSON AUTO TRANSPORT LLC | | | SCAC4 |
| 566 | RATO | R A TRANSPORT LLC | | | SCAC4 |
| 567 | RATP | RAYS TRANSPORTATION INC | | | SCAC3 |
| 568 | RATP | R A TRANSPORT INC | | | SCAC4 |
| 569 | RATP | Régie Autonome des Transports Parisiens | | FR | VKM |
| 570 | RATQ | RATCLIFF TRUCKING SERVICE | | | SCAC3 |
| 571 | RATR | R A TRANSPORTATION SERVICE LLC | | | SCAC4 |
| 572 | RATS | R A TRANSPORT INC | | | SCAC4 |
| 573 | RATT | Regia Autonomă de Transport Timişoara | City: Timisoara | RO | TRAFFIC |
| 574 | RATU | Royal Atlantic | | | RSRV |
| 575 | RATU | ARMSTRONG (TRANSPORT) | | | SCAC3 |
| 576 | RATU | ROYAL ATLANTIC LLC | | | SCAC4 |
| 577 | RATUC | Regia Autonomă de Transport Urban de Călători | City: Cluj, - 2013 | RO | TRAFFIC |
| 578 | RATV | RATAL TRAVEL & TOURS | | | SCAC3 |
| 579 | RATW | R & A TRANSPORT INC | | | SCAC4 |
| 580 | RATX | RailTex Service Co., Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 581 | RATX | RailTex Service Co., Inc. | Jul-00 | | NRHS |
| 582 | RATX | RAILTEX SERVICE CO. | | | PWRC |
| 583 | RATX | RailTex Service | | | RSRV |
| 584 | RATX | RAILTEX SERVICE CO INC | | | SCAC4 |
| 585 | RATY | R & A TRUCKING LLC | | | SCAC4 |
| 586 | RAU | Uganda Royal Airways | Callsign: Uganda Royal, | EAU | AVCODES |
| 587 | RAU | Uganda Royal Airways | | | ICAO1 |
| 588 | RAUE | RAUSSER DISTRIBUTING COMPANY INC | | | SCAC3 |
| 589 | RAUE | RAMON LOSOYA, ISABEL AURELIA | | | SCAC4 |
| 590 | RAUI | ROLLINS AUTO TRANSPORT INC | | | SCAC3 |
| 591 | RAUL | RAMOS FUEL | | | SCAC4 |
| 592 | RAUM | RAUSCHER, MARTIN | | | SCAC3 |
| 593 | RAUN | RODGAR AUTOTRANSPORTES | | | SCAC4 |
| 594 | RAUO | ROBERTS AUTO TRANSPORT | | | SCAC3 |
| 595 | RAUP | RAU, PAUL | | | SCAC3 |
| 596 | RAUR | RAUSCH TRANSPORT INC | | | SCAC3 |
| 597 | RAUS | RAUSEO PETROLEUM INC | | | SCAC4 |
| 598 | RAV | Reed Aviation Limited | Callsign: Reed Aviation, | GB | AVCODES |
| 599 | RAV | Rollins Air S. de r.l. | Callsign: Rollins, | HN | AVCODES |
| 600 | RAV | Reed Aviation | | | ICAO1 |
