| 2701 | REDG | RED TRUCKING | | | SCAC3 |
| 2702 | REDG | RED EAGLE EXPRESS | | | SCAC4 |
| 2703 | REDG | Red Route Buses, Gravesend | | GB | TRAFFIC |
| 2704 | REDH | REDHAGE TRUCK LINES INC | | | SCAC3 |
| 2705 | REDH | RED HOT DELIVERIES | | | SCAC4 |
| 2706 | REDI | R E D S | | | SCAC3 |
| 2707 | REDJ | RED LETTER TRUCKING CO | | | SCAC3 |
| 2708 | REDK | REDDICK AUTO EXPRESS INC | | | SCAC3 |
| 2709 | REDK | RED K TRANSPORT INC | | | SCAC4 |
| 2710 | REDL | RED LINE INC | | | SCAC3 |
| 2711 | REDL | Red Line (Brickwood) | | GB | TRAFFIC |
| 2712 | REDLINE | Redline Buses | | GB | TRAFFIC |
| 2713 | REDM | REDMAN VAN AND STORAGE CO | | | SCAC3 |
| 2714 | REDN | RED CARPET LIMOUSINE SERVICE | | | SCAC3 |
| 2715 | REDN | RED TRANSPORTADORA NACIONAL DE CARG | | | SCAC4 |
| 2716 | REDO | RED LINE TRANSPORT | | | SCAC3 |
| 2717 | REDP | REDDING LUMBER TRANSPORT, INC | | | SCAC3 |
| 2718 | REDP | REDDING LUMBER TRANSPORT INC | | | SCAC4 |
| 2719 | REDQ | REDSHAW TRUCK SERVICE | | | SCAC3 |
| 2720 | REDQ | REDTECH INC | | | SCAC4 |
| 2721 | REDR | Red Rose of Aylesbury | | GB | TRAFFIC |
| 2722 | REDROSE | Red Rose Transit Authority | | USA | TRAFFIC |
| 2723 | REDROV | Red Rover | | GB | TRAFFIC |
| 2724 | REDT | REDFORD TRUCK LINE | | | SCAC4 |
| 2725 | REDTAN | Red & Tan | | USA | TRAFFIC |
| 2726 | REDU | SITEBOX STORAGE | | USA | BIC |
| 2727 | REDU | Sitebox Storage | | | RSRV |
| 2728 | REDV | RED RIVER TRANSPORTATION | | | SCAC4 |
| 2729 | REDW | REDWOOD EMPIRE TRANSPORTATION CO IN | | | SCAC3 |
| 2730 | REDW | REDWOOD EMPIRE TRANSPORTATION CO IN | | | SCAC4 |
| 2731 | REDX | Miron/U.S.A. Ltd. | added 1/1986; eliminated 7/1991; 1/1994-7/2005 (not listed) | | NAKINA |
| 2732 | REDX | Miron/U.S.A. Ltd. | added 1/86; eliminated 7/91; 1/94-7/2000 | | NRHS |
| 2733 | REDX | MIRON/USA LTD. | | | PWRC |
| 2734 | REDX | Saudi Research and Development Corporation (REDEC) | | | RSRV |
| 2735 | REDY | REDDY TRUCKING CO | | | SCAC3 |
| 2736 | REDZ | *REDMOND INDUSTRY | | | PWRC |
| 2737 | REDZ | *REDON, INC. | | | PWRC |
| 2738 | REDZ | REDON Inc. | | | RSRV |
| 2739 | REDZ | TRANSPORT INTERNATIONAL POOL INC | | | SCAC4 |
| 2740 | REE | Aero Reservaciones Ejecutivas, S.A. de C.V. | Callsign: Aeroresvaciones, | MEX | AVCODES |
| 2741 | REE | Regency Air Pvt. Ltd. | Callsign: Regency Aviation, | PK | AVCODES |
| 2742 | REE | Exclusive Aviation | Callsign: Skyfall, | BS | AVCODES |
| 2743 | REEA | RAMIREZ ELIZONDO, ERNESTINA | | | SCAC4 |
| 2744 | REEB | REED BROTHERS | | | SCAC3 |
| 2745 | REEB | REEB MILLWORK CORP | | | SCAC4 |
| 2746 | REEC | REED TRUCKING COMPANY | | | SCAC4 |
| 2747 | REEE | REES ENTERPRIZES INC | | | SCAC4 |
| 2748 | REEF | REEFER TRUCK BROKERS INC | | | SCAC4 |
| 2749 | REEG | REESE, GARY TRUCKING | | | SCAC3 |
| 2750 | REEI | REA EXPRESS | | | SCAC3 |
| 2751 | REEI | RECYCLING EXPRESS INC | | | SCAC4 |
| 2752 | REEJ | REED, JOHN R INC | | | SCAC4 |
| 2753 | REEK | REEK, IVAN, TRUCKING | | | SCAC3 |
| 2754 | REEL | REESE TRANSPORTATION LLC | | | SCAC4 |
| 2755 | REEN | REE NEWKIRK TRUCK LINE | | | SCAC3 |
| 2756 | REEN | R E E ENTERPRISES INC | | | SCAC4 |
| 2757 | REEO | REED OIL COMPANY INC | | | SCAC4 |
| 2758 | REEP | RACINE, A & FILS LTEE | | | SCAC4 |
| 2759 | REEQ | REESE TRUCKING | | | SCAC3 |
| 2760 | REER | R E ENTERPRISES | | | SCAC3 |
| 2761 | REES | REESMAN TRANSFER, INC | | | SCAC3 |
| 2762 | REES | REESOR, PAUL TRANSPORT INC | | | SCAC4 |
| 2763 | REET | REED TRUCKING COMPANY | | | SCAC3 |
| 2764 | REEV | REEVES TRANSPORTATION COMPANY | | | SCAC3 |
| 2765 | REEV | REEVES TRUCKING INC | | | SCAC4 |
| 2766 | REEY | REED TRUCKING | | | SCAC3 |
| 2767 | REF | Reguljair | IATA: R8, Callsign: Reguljair, Designator R8* recalled by IATA | S | AVCODES |
| 2768 | REF | Reef Air Ltd. (Air Transport (Chatham Islands) Ltd) | Callsign: Reef Air, | NZ | AVCODES |
| 2769 | REF | Reef Air | | | ICAO1 |
| 2770 | REF | Rendsburger Eisenbahnfreunde e.V. | Rendsburg | D | privat-bahn.de |
| 2771 | REFA | REFLEN S A DE C V | | | SCAC4 |
| 2772 | REFB | REPUBLIC CORPORATION OF HOUSTON TEX | | | SCAC3 |
| 2773 | REFC | REEDS FUEL COMPANY | | | SCAC3 |
| 2774 | REFC | REFRIGERADOS RRR | | | SCAC4 |
| 2775 | REFD | REFRIGERATED FOOD SYSTEMS INC | | | SCAC4 |
| 2776 | REFE | REFRIGERATED FOOD EXPRESS, INC | | | SCAC3 |
| 2777 | REFE | REFRIGERATED FOOD EXPRESS INC | | | SCAC4 |
| 2778 | REFER | Rede Ferroviária Nacional, E.P. | | PT | VKM |
| 2779 | REFF | RESERS FINE FOODS INC | | | SCAC4 |
| 2780 | REFJ | READY, FRED J INC | | | SCAC3 |
| 2781 | REFJ | RAATH LINES | | | SCAC4 |
| 2782 | REFL | RESORT FREIGHT LINES | | | SCAC3 |
| 2783 | REFO | REFRIGERATED DELIVERY SERVICE INC | | | SCAC3 |
| 2784 | REFQ | REFINERS TRANSPORT SERVICE INC | | | SCAC3 |
| 2785 | REFR | REFRIGERATED TRANSPORT, INC | | | SCAC3 |
| 2786 | REFS | RODRIGUEZ EXPEDITED FREIGHT SYSTEMS | | | SCAC4 |
| 2787 | REFT | REDOE MOLD LIMITED | | | SCAC4 |
| 2788 | REFU | PETIT FORESTIER CONTAINER NEDERLAND BV | | NL | BIC |
| 2789 | REFU | REFCON B.V. REFFER ENGINEERING | | | SCAC3 |
| 2790 | REFU | REFTRADE BV | | | SCAC4 |
| 2791 | REFV | RUSH EXPEDITING INC | | | SCAC4 |
| 2792 | REFW | REDLINE EXPRESS | | | SCAC4 |
| 2793 | REG | Regourd Aviation | Callsign: Regourd, | F | AVCODES |
| 2794 | REG | Regional Air Services Limited | IATA: 8N, Callsign: Regional Services, | EAT | AVCODES |
| 2795 | REG | Regional Air Services | | | ICAO1 |
| 2796 | REG | Regional Railways | Regional Railways was one of the three passenger sectors of British Rail created in the 1980s that existed until privatisation in the 1990s. The sector was originally called Provincial, and ran regional non-express services. | GB | TRAFFIC |
| 2797 | REGA | REDIEHS, GEORGE A, COMPANY, INC | | | SCAC3 |
| 2798 | REGA | REGINA TRANSPORT INC | | | SCAC4 |
| 2799 | REGAL | Regal Busways | | GB | TRAFFIC |
| 2800 | REGB | RAZOR ENTERPRISE INC | | | SCAC4 |
