| 601 | RATB | Regia Autonomă de Transport București | City: Bucharest | RO | TRAFFIC |
| 602 | RATC | RATA ASSOCIATES INC | | | SCAC3 |
| 603 | RATC | R & A TRUCKING INC | | | SCAC4 |
| 604 | RATC | Royal Army Transport Corps | | | TRAFFIC |
| 605 | RATD | RAMPANT DEVELOPMENT CORPORATION | | | SCAC3 |
| 606 | RATD | RATD INC | | | SCAC4 |
| 607 | RATE | RAIL-TRAIL CO | | | SCAC3 |
| 608 | RATE | RATEP RENOVATIONS INC | | | SCAC4 |
| 609 | RATF | ROULOTTES ACADIE TRAILERS INC | | | SCAC4 |
| 610 | RATG | RAYNORS TRUCKING INC | | | SCAC3 |
| 611 | RATH | R & A TRANSPORT | | | SCAC4 |
| 612 | RATI | RAPID AIR TRUCK INC | | | SCAC3 |
| 613 | RATI | RITAS ABSOLUTE TRUCKING INC | | | SCAC4 |
| 614 | RATK | RANGER TRUCK INC | | | SCAC3 |
| 615 | RATK | RAT | | | SCAC4 |
| 616 | RATL | RAMUS TRUCKING LINE INC | | | PWRC |
| 617 | RATL | RAMUS TRUCKING LINE, INC | | | SCAC3 |
| 618 | RATL | R & A TRANSPORTATION LOGISTICS | | | SCAC4 |
| 619 | RATM | RATLEYS MOBILE HOME SALES | | | SCAC3 |
| 620 | RATM | R A TRANSPORT INC | | | SCAC4 |
| 621 | RATN | RATLIFF TRUCKING CORPORATION INC | | | SCAC3 |
| 622 | RATN | ROBINSON AUTO TRANSPORT LLC | | | SCAC4 |
| 623 | RATO | R A TRANSPORT LLC | | | SCAC4 |
| 624 | RATP | RAYS TRANSPORTATION INC | | | SCAC3 |
| 625 | RATP | R A TRANSPORT INC | | | SCAC4 |
| 626 | RATP | Régie Autonome des Transports Parisiens | | FR | VKM |
| 627 | RATQ | RATCLIFF TRUCKING SERVICE | | | SCAC3 |
| 628 | RATR | R A TRANSPORTATION SERVICE LLC | | | SCAC4 |
| 629 | RATS | R A TRANSPORT INC | | | SCAC4 |
| 630 | RATT | Regia Autonomă de Transport Timişoara | City: Timisoara | RO | TRAFFIC |
| 631 | RATU | Royal Atlantic | | | RSRV |
| 632 | RATU | ARMSTRONG (TRANSPORT) | | | SCAC3 |
| 633 | RATU | ROYAL ATLANTIC LLC | | | SCAC4 |
| 634 | RATUC | Regia Autonomă de Transport Urban de Călători | City: Cluj, - 2013 | RO | TRAFFIC |
| 635 | RATV | RATAL TRAVEL & TOURS | | | SCAC3 |
| 636 | RATW | R & A TRANSPORT INC | | | SCAC4 |
| 637 | RATX | RailTex Service Co., Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 638 | RATX | RailTex Service Co., Inc. | Jul-00 | | NRHS |
| 639 | RATX | RAILTEX SERVICE CO. | | | PWRC |
| 640 | RATX | RailTex Service | | | RSRV |
| 641 | RATX | RAILTEX SERVICE CO INC | | | SCAC4 |
| 642 | RATY | R & A TRUCKING LLC | | | SCAC4 |
| 643 | RAU | Uganda Royal Airways | Callsign: Uganda Royal, | EAU | AVCODES |
| 644 | RAU | Uganda Royal Airways | | | ICAO1 |
| 645 | RAUE | RAUSSER DISTRIBUTING COMPANY INC | | | SCAC3 |
| 646 | RAUE | RAMON LOSOYA, ISABEL AURELIA | | | SCAC4 |
| 647 | RAUI | ROLLINS AUTO TRANSPORT INC | | | SCAC3 |
| 648 | RAUL | RAMOS FUEL | | | SCAC4 |
| 649 | RAUM | RAUSCHER, MARTIN | | | SCAC3 |
| 650 | RAUN | RODGAR AUTOTRANSPORTES | | | SCAC4 |
| 651 | RAUO | ROBERTS AUTO TRANSPORT | | | SCAC3 |
| 652 | RAUP | RAU, PAUL | | | SCAC3 |
| 653 | RAUR | RAUSCH TRANSPORT INC | | | SCAC3 |
| 654 | RAUS | RAUSEO PETROLEUM INC | | | SCAC4 |
| 655 | RAV | Reed Aviation Limited | Callsign: Reed Aviation, | GB | AVCODES |
| 656 | RAV | Rollins Air S. de r.l. | Callsign: Rollins, | HN | AVCODES |
| 657 | RAV | Reed Aviation | | | ICAO1 |
| 658 | RAVA | RAVALLI MOTOR FREIGHT | | | SCAC3 |
| 659 | RAVEN | Raven Trading s.r.o. | | CZ | VKM |
| 660 | RAVH | RAPIER-VIEHWEG & ASSOCIATES | | | SCAC3 |
| 661 | RAVI | RAIL VAN DISTRIBUTORS INC | | | SCAC3 |
| 662 | RAVI | RAVELLO INTERNATIONAL LTD | | | SCAC4 |
| 663 | RAVL | RAVEILL, CARROLL | | | SCAC3 |
| 664 | RAVM | RAVINE MUSHROOM (1983) LTD | | | SCAC4 |
| 665 | RAVO | RAVENNA OIL COMPANY | | | SCAC4 |
| 666 | RAVP | RAVENSBERGE | | | SCAC4 |
| 667 | RAVQ | RARITAN VALLEY SHIPPING AGENT | | | SCAC3 |
| 668 | RAVQ | REAVES INC | | | SCAC4 |
| 669 | RAVR | RAVEN RENEWAL COMPANY | | | SCAC3 |
| 670 | RAVT | RAVEN TRANSFER & STORAGE | | | SCAC3 |
| 671 | RAVU | LATAM BOX COLOMBIA SAS | | CO | BIC |
| 672 | RAVU | FLEX BOX LIMITED | | | SCAC4 |
| 673 | RAVX | RAVENA ARSENAL | | | PWRC |
| 674 | RAW | Regional Air Limited | | EAK | AVCODES |
| 675 | RAW | Great Southwest Aviation | Callsign: Hondo, | USA | AVCODES |
| 676 | RAWD | RAYWOOD TRANSPORT INC | | | SCAC4 |
| 677 | RAWH | RAWHIDE CARRIERS INC | | | SCAC3 |
| 678 | RAWJ | RAWLEY, J W | | | SCAC3 |
| 679 | RAWL | RAWLINGS TRUCK LINES INC | | | SCAC3 |
| 680 | RAWL | RAWL, WALTER P & SONS INC | | | SCAC4 |
| 681 | RAWM | RAWLINGS, WADE MORRIS | | | SCAC4 |
| 682 | RAWO | R & W TRUCKING CO INC | | | SCAC3 |
| 683 | RAWO | RINGS AROUND THE WORLD LTD | | | SCAC4 |
| 684 | RAWP | Rechsbahn Ausbesserungswerke Potsdam | | D | TRAFFIC |
| 685 | RAWQ | RAWLS OIL SERVICE | | | SCAC3 |
| 686 | RAWR | RARUS RAILWAY COMPANY | | | PWRC |
| 687 | RAWS | R A | | | SCAC4 |
| 688 | RAWU | QUANZHOU YIYANG CONTAINER SERVICE C | | | SCAC4 |
| 689 | RAWX | Platte River Power Authority | added 4/1984; eliminated 4/1990; 1/1994-7/2005 (not listed) | | NAKINA |
| 690 | RAWX | Riverside Acid & Inhibitor Co. | 1/1943-1/1952; eliminated 7/1953 | | NAKINA |
| 691 | RAWX | Riverside Acid Works | 7/1930-1/1941 | | NAKINA |
| 692 | RAWX | Riverside Acid Works | Apr-38 | | NRHS |
| 693 | RAWX | Riverside Acid & Inhibitor Co. | Jan-52 | | NRHS |
| 694 | RAWX | Platte River Power Authority | added 4/84; eliminated 4/90; 1/94-7/2000 | | NRHS |
| 695 | RAWX | *RIVERSIDE ACID INHIBITOR CO. [RIVERSIDE ACID WORKS] | | | PWRC |
| 696 | RAWX | +PLATTE RIVER POWER AUTHORITY | | | PWRC |
| 697 | RAWX | Platte River Power Authority | | | RSRV |
| 698 | RAWX | PLATTE RIVER POWER AUTHORITY | | | SCAC4 |
| 699 | RAWY | RATHWAY, EDWARD R TRUCKING INC | | | SCAC3 |
| 700 | RAX | Royal Air Freight, Inc. | Callsign: Air Royal, | USA | AVCODES |
