| 9601 | RUA | Russow Aviation GmbH | Callsign: Overnight, | D | AVCODES |
| 9602 | RUA | Rwanda Airlines | Designator 9R recalled by IATA | RWA | AVCODES |
| 9603 | RUA | Rwanda Airlines | | | ICAO1 |
| 9604 | RUAD | RURAL AIR DELIVERY SERVICE INC | | | SCAC3 |
| 9605 | RUAL | RUSSO, A & L | | | SCAC4 |
| 9606 | RUAM | RUDISILL, A M | | | SCAC3 |
| 9607 | RUAN | RUAN TRANSPORT CORPORATION | | | SCAC3 |
| 9608 | RUAN | RUAN TRANSPORT CORPORATION | | | SCAC4 |
| 9609 | RUAT | RUSSO, ARTHUR TRUCKING | | | SCAC3 |
| 9610 | RUAT | RUDY, H E | | | SCAC4 |
| 9611 | RUBD | RUMBOLD, EZRA & SON INC | | | SCAC3 |
| 9612 | RUBE | RUBIO, NEMESIO G | | | SCAC3 |
| 9613 | RUBF | RUMBOLD FARMS | | | SCAC3 |
| 9614 | RUBI | RUBIN BROS WASTE CO | | | SCAC3 |
| 9615 | RUBJ | RUBIANO, J H TRUCKING INC | | | SCAC4 |
| 9616 | RUBK | RUBIO TRUCKING | | | SCAC4 |
| 9617 | RUBM | RUBICON OIL COMPANY | | | SCAC4 |
| 9618 | RUBQ | RUBBER CITY CARTAGE CO | | | SCAC3 |
| 9619 | RUBR | RUBRIGHT INC | | | SCAC3 |
| 9620 | RUBR | REINDEER AUTO RELOCATION | | | SCAC4 |
| 9621 | RUBT | RUBENS TRANSPORT/RUBEN ESINOZA TRUC | | | SCAC3 |
| 9622 | RUBU | RUBINO RS S.R.L. | | I | BIC |
| 9623 | RUBV | RUBY SERVICES LTD. | | | SCAC3 |
| 9624 | RUBY | RUBY TRANSPORT LTD | | | SCAC3 |
| 9625 | RUC | Rutas Aereas de Venezuela RAV, S.A. | IATA: AW, Callsign: Rutaca, | YV | AVCODES |
| 9626 | RUC | Rutas Aereas, C.A. d/b/a RUTACA | IATA: 5R, Callsign: Rutaca, Name changed to Rutas Aereas, C.A. d/b/a Rutaca Airlines | YV | AVCODES |
| 9627 | RUC | Rutas Aereas, C.A. d/b/a Rutaca Airlines | IATA: 5R, Callsign: Rutaca, Name changed from Rutas Aereas, C.A. d/b/a RUTACA | YV | AVCODES |
| 9628 | RUC | Rutas Aereas | | | ICAO1 |
| 9629 | RUCA | RUSS/CAMP TRANSPORT SERVICE | | | SCAC3 |
| 9630 | RUCC | RUDE CARRIER CORP | | | SCAC3 |
| 9631 | RUCE | RUFF, CHARLES E | | | SCAC3 |
| 9632 | RUCG | R U CARTAGE | | | SCAC3 |
| 9633 | RUCH | RUSCH, A H DISTRIBUTING INC | | | SCAC3 |
| 9634 | RUCO | RICE UNRUH CO | | | SCAC3 |
| 9635 | RUCO | RICE-UNRUH REYNOLDS CO | | | SCAC4 |
| 9636 | RUCS | RUSHCO SERVICES INC | | | SCAC3 |
| 9637 | RUD | Air Anastasia Ltd | Callsign: Anastasia, | UA | AVCODES |
| 9638 | RUD | Air Anastasia | | | ICAO1 |
| 9639 | RUDD | RUDDWAY DRAYAGE, INC | | | SCAC3 |
| 9640 | RUDE | RUDE TRANSPORTATION COMPANY, INC | | | SCAC3 |
| 9641 | RUDH | RUDD, HARLAN D | | | SCAC3 |
| 9642 | RUDH | RUIZ CARRILLO, IGNACIO & JUAN FRANC | | | SCAC4 |
| 9643 | RUDI | RUDDS TRANSFER AND STORAGE INC | | | SCAC4 |
| 9644 | RUDJ | RUDE, JOHN VAN & STORAGE COMPANY | | | SCAC3 |
| 9645 | RUDK | RU-D TRUCKING | | | SCAC4 |
| 9646 | RUDL | RUSSELL DELIVERY | | | SCAC4 |
| 9647 | RUDN | RUDDLE TRUCKING INC | | | SCAC3 |
| 9648 | RUDN | RIDEOUT CARREIRS INC | | | SCAC4 |
| 9649 | RUDO | RUDOLPHS INC | | | SCAC3 |
| 9650 | RUDO | RUDOLPH FREIGHT SYSTEMS INC | | | SCAC4 |
| 9651 | RUDP | RUDOLPHS EXPRESS | | | SCAC3 |
| 9652 | RUDP | RUDOLPHS SPECIALTY BAKERIES LTD | | | SCAC4 |
| 9653 | RUDQ | RUDY TRANSFER INC | | | SCAC3 |
| 9654 | RUDR | RUDY, RICHARD B INC | | | SCAC3 |
| 9655 | RUDS | RUDE, MURRAY SERVICES INC | | | SCAC3 |
| 9656 | RUDT | RUD, SCOTT TRUCKING INC | | | SCAC4 |
| 9657 | RUDV | RUSH DELIVERY SERVICE CO | | | SCAC3 |
| 9658 | RUDX | Ruddy Tank Car Co. | added 10/1968; 4/1970-7/2000; eliminated 4/2005; 7/2005 (not listed) | | NAKINA |
| 9659 | RUDX | Reid's Union Dairy, Inc. | 7/1935 | | NAKINA |
| 9660 | RUDX | Ruddy Tank Car Co. | added 10/68; 4/70-7/2000 | | NRHS |
| 9661 | RUDX | RUDDY TANK CAR COMPANY | | | PWRC |
| 9662 | RUDX | Ruddy Tank Car | | | RSRV |
| 9663 | RUDX | RUDDY TANK CAR COMPANY | | | SCAC4 |
| 9664 | RUEG | RUEGSEGGER, BENJAMIN H | | | SCAC3 |
| 9665 | RUEH | RUEHLES TOWING INC | | | SCAC4 |
| 9666 | RUEL | RUSSELL, TOM & SONS | | | SCAC3 |
| 9667 | RUEN | RUBBER ENTERPRISES | | | SCAC4 |
| 9668 | RUEQ | RUBRIGHT EXPED | | | SCAC3 |
| 9669 | RUER | RUDISON, EDGAR TRUCKING | | | SCAC3 |
| 9670 | RUES | RUTH EQUIPMENT AND SUPPLY CO | | | SCAC3 |
| 9671 | RUET | RUETER, ELDEN TRUCKING INC | | | SCAC3 |
| 9672 | RUEV | RUE, VAUGHN PRODUCE CO INC | | | SCAC3 |
| 9673 | RUF | Air 1st Aviation Companies of Oklahoma, Inc. | Callsign: Rough Rider, | USA | AVCODES |
| 9674 | RUFD | RUFFING, DAN TRUCKING | | | SCAC3 |
| 9675 | RUFE | RUFF, E D | | | SCAC3 |
| 9676 | RUFI | RUFFIN INC | | | SCAC3 |
| 9677 | RUFM | RENEAU FARMS | | | SCAC4 |
| 9678 | RUFO | RUFO TRANSPORT LEASING | | | SCAC3 |
| 9679 | RUFQ | RUFF-WALKER TRANSFER CO INC | | | SCAC3 |
| 9680 | RUFR | RUFFNER, LARRY A TRUCKING INC | | | SCAC3 |
| 9681 | RUGD | RUST, GLEN D, AND WAYNE RUST, A PAR | | | SCAC3 |
| 9682 | RUGG | RUGGIERO BROS INC | | | SCAC4 |
| 9683 | RUGH | RUGH, WARD, INC | | | SCAC3 |
| 9684 | RUGL | RUGGLES INC | | | SCAC3 |
| 9685 | RUGN | RIENDEAU, GASTON | | | SCAC4 |
| 9686 | RUGO | RUTIGLIANO PAPER STOCK INC | | | SCAC3 |
| 9687 | RUGR | RUSSELLS GRAIN INC | | | SCAC3 |
| 9688 | RUGR | RUG RATS CONTRACTING | | | SCAC4 |
| 9689 | RUGT | RUNGE TRUCKING INC | | | SCAC3 |
| 9690 | RUGU | RUGBY LIMITED | | | SCAC4 |
| 9691 | RUH | Rusich-T, Aircompany CJSC | | RUS | AVCODES |
| 9692 | RUH | Rusich-T | | | ICAO1 |
| 9693 | RUHA | RUTHANNE TRUCKING | | | SCAC3 |
| 9694 | RUHE | RUHL, LARRY E | | | SCAC3 |
| 9695 | RUHL | RUSS-HILL TRANSPORT | | | SCAC3 |
| 9696 | RUHQ | RUHLMAN C TRUCKING CO | | | SCAC3 |
| 9697 | RUHRB | Ruhrbahn GmbH | Es entstand im Jahr 2017 aus der Fusion von Essener Verkehrs-AG (EVAG) und Mülheimer Verkehrsgesellschaft (MVG) | D | TRAFFIC |
| 9698 | RUHRO | Ruhr Oel GmbH | | DE | VKM |
| 9699 | RUHW | RUSHWAY INC | | | SCAC3 |
| 9700 | RUHW | RUSHWAY INC | | | SCAC4 |
