| 5801 | RM | RIMA Rio Madeira Aerotáxi Ltda | IATA Designator chanegd to R8. | BR | AVCODES |
| 5802 | RM | | | I | TRAFFIC |
| 5803 | RM | Rallarmålarna AB | | SE | VKM |
| 5804 | RMA | Rocky Mountain Airways | IATA: JC, Callsign: Rocky Mountain, Merged into Britt Airways to form Continental Express during 1991. Founded in 1963. Commenced operations in 1965. | USA | AVCODES |
| 5805 | RMA | Rocky Mountain Airways | Callsign: Rocky Mountain, | USA | AVCODES |
| 5806 | RMA | Rocky Mountain Airways | | | ICAO1 |
| 5807 | RMAA | RAMZA INC | | | SCAC4 |
| 5808 | RMAB | RODRIGUEZ, M TRANSPORTATION | | | SCAC4 |
| 5809 | RMAC | ROMA CORPORATION | | | SCAC3 |
| 5810 | RMAG | ROLAND MARKETING | | | SCAC4 |
| 5811 | RMAH | R & M TRANSPORT INC | | | SCAC4 |
| 5812 | RMAI | ROSS MACHINE & IRON WORKS INC | | | SCAC4 |
| 5813 | RMAJ | RODRIGUEZ, MIGUEL ANGEL | | | SCAC4 |
| 5814 | RMAK | ROMA TRANSPORT INC | | | SCAC3 |
| 5815 | RMAL | REYES, MARIVEL | | | SCAC4 |
| 5816 | RMAN | ROMANS TRANSPORTATION INC | | | SCAC3 |
| 5817 | RMAN | RAMAN TRUCKING | | | SCAC4 |
| 5818 | RMAQ | ROMA FOOD ENTERPRISES | | | SCAC3 |
| 5819 | RMAQ | ROMA FOOD ENTERPRISES INC (VISTAR C | | | SCAC4 |
| 5820 | RMAR | RAILMAR AGENCY LTD, s.r.o. | | CZ | VKM |
| 5821 | RMAS | RAMIREZ & SONS | | | SCAC3 |
| 5822 | RMAT | ROMA TRANSPORT SERVICE INC | | | SCAC3 |
| 5823 | RMAV | R M I GLOBAL LOGISTICS INC | | | SCAC4 |
| 5824 | RMAW | REM MARITIME AS | | | SCAC4 |
| 5825 | RMAX | Rocky Mountain Rail Society | 7/2000-7/2005 (not listed) | | NAKINA |
| 5826 | RMAX | American Refrigerator Transit Co. | added 4/1956; 10/1957-4/1970; eliminated 4/1974; 1/1975-1/1980 | | NAKINA |
| 5827 | RMAX | American Refrigerator Transit Co. | 10/57-4/70; eliminated 4/74; 1/75-1/80 | | NRHS |
| 5828 | RMAX | Rocky Mountain Rail Society | Jul-00 | | NRHS |
| 5829 | RMAX | *AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 5830 | RMAX | +ROCKY MOUNTAIN RAIL SOCIETY | | | PWRC |
| 5831 | RMAX | Rocky Mountain Rail Society | | | RSRV |
| 5832 | RMAX | ROCKY MOUNTAIN RAIL SOCIETY | | | SCAC4 |
| 5833 | RMAY | REMINGTON MOVING AND STORAGE | | | SCAC4 |
| 5834 | RMB | Routemaster Buses Ltd. | | GB | TRAFFIC |
| 5835 | RMBA | RUMBA SHIPPING LIMITED | | | SCAC3 |
| 5836 | RMBA | RMT TRANSPORT LLC | | | SCAC4 |
| 5837 | RMBC | RAMSDE | | | SCAC4 |
| 5838 | RMBC | RMB Club | | USA | TRAFFIC |
| 5839 | RMBD | RAMBAUD INTERNATIONAL | | | SCAC3 |
| 5840 | RMBD | RELIABLE METAL BUILDINGS LTD | | | SCAC4 |
| 5841 | RMBE | R M B ENTERPRISES INC | | | SCAC4 |
| 5842 | RMBF | RMB OILFIELD SERVICES | | | SCAC4 |
| 5843 | RMBH | ROSIE MOBILE HOME TOWING INC | | | SCAC3 |
| 5844 | RMBI | R & M LOGISTICS LLC | | | SCAC4 |
| 5845 | RMBK | RUMBLE TRUCKING & LOGISTICS INC | | | SCAC4 |
| 5846 | RMBL | RAMIREZ, BLANCA E | | | SCAC4 |
| 5847 | RMBM | RA ELLS MOBILE MOVING | | | SCAC3 |
| 5848 | RMBN | RAMBONE TRUCKING CO INC | | | SCAC3 |
| 5849 | RMBN | RMF SOLUTIONS | | | SCAC4 |
| 5850 | RMBO | RAMBO REEFER SERVICES | | | SCAC3 |
| 5851 | RMBP | ROCKY MOUNTAIN BRAKE SUPPLY INC | | | SCAC4 |
| 5852 | RMBQ | RMB CORP | | | SCAC3 |
| 5853 | RMBR | RAMBLER TRUCKING INC | | | SCAC3 |
| 5854 | RMBS | REINER BROS INC | | | SCAC3 |
| 5855 | RMBS | RMB SHIPPING BV | | | SCAC4 |
| 5856 | RMBT | ROMNEY, BUCK TRUCKING | | | SCAC3 |
| 5857 | RMBT | ROMNEY, BUCK TRUCKING | | | SCAC4 |
| 5858 | RMBX | American Refrigerator Transit Co. | added 7/1962; 7/1965-4/1970; eliminated 4/1972 | | NAKINA |
| 5859 | RMBX | American Refrigerator Transit Co. | 7/65-4/70; eliminated 4/72 | | NRHS |
| 5860 | RMBX | AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 5861 | RMC | RMC Group Services Ltd. | Callsign: Readymix, | GB | AVCODES |
| 5862 | RMCB | RICCOBENE MASONRY CO INC | | | SCAC4 |
| 5863 | RMCC | R M C CORPORATION | | | SCAC3 |
| 5864 | RMCC | RM CLASSIC CARS | | | SCAC4 |
| 5865 | RMCD | ROMARCO CORPORATION | | | SCAC3 |
| 5866 | RMCD | RMC TRANSPORTATION INC | | | SCAC4 |
| 5867 | RMCF | ROCKY MOUNTAIN CONTRACTORS INC | | | SCAC4 |
| 5868 | RMCG | RICHE, MAURICE G | | | SCAC3 |
| 5869 | RMCG | REMLINGER MANUFACTURING CO INC | | | SCAC4 |
| 5870 | RMCH | RAMCO TRUCKING INC | | | SCAC3 |
| 5871 | RMCH | RM: Regionalverkehr Mittelland AG | Real: RM | CH | TRAFFIC |
| 5872 | RMCI | RAIL MARINE CONTAINER TRANSPORT INC | | | SCAC3 |
| 5873 | RMCL | RAMOS, CARLOS TRUCKING INC | | | SCAC3 |
| 5874 | RMCM | R M C TRUCKING INC | | | SCAC3 |
| 5875 | RMCM | RMC INC | | | SCAC4 |
| 5876 | RMCO | RMC TRANSPORTATION INC | | | SCAC3 |
| 5877 | RMCP | RAMCO TRUCKING INC | | | SCAC3 |
| 5878 | RMCQ | R M CARTAGE INC | | | SCAC3 |
| 5879 | RMCR | REMCO TRANSPORTATION CO INC | | | SCAC3 |
| 5880 | RMCS | RIMARC TRANSPORTATION INC | | | SCAC4 |
| 5881 | RMCU | MULTISTAR LEASING LTD | | GB | BIC |
| 5882 | RMCU | RMC (TRANCOLEASING) LTD. | | | PWRC |
| 5883 | RMCU | RMC Trancoleasing | | | RSRV |
| 5884 | RMCU | REYNOLDS METALS COMPANY | | | SCAC3 |
| 5885 | RMCU | MULTISTAR LEASING LIMITED | | | SCAC4 |
| 5886 | RMCW | RICHWOOD MEAT COMPANY | | | SCAC4 |
| 5887 | RMCX | Aluminum Co. of America | added 1/2009 | | NAKINA |
| 5888 | RMCX | Reynolds Metals Co. | added 4/1969; 4/1970-7/2005; eliminated 10/2006; added 7/2007; eliminated 1/2009 | | NAKINA |
| 5889 | RMCX | Reade Manufacturing Co., Inc. | 7/1954 (not listed); added 7/1955; 10/1957-4/1961; eliminated 10/1964 | | NAKINA |
| 5890 | RMCX | Reid, Murdoch, a Division of Consolidated Grocers Corp. | 4/1947-1/1950 | | NAKINA |
| 5891 | RMCX | Reid, Murdoch & Co. | 7/1935-1/1946 | | NAKINA |
| 5892 | RMCX | Reid, Murdoch & Co. | Apr-38 | | NRHS |
| 5893 | RMCX | Reade Manufacturing Co., Inc. | added 7/55; 10/57-4/61 | | NRHS |
| 5894 | RMCX | Reynolds Metals Co. | added 4/69; 4/70-7/2000 | | NRHS |
| 5895 | RMCX | *REID, MURDOCH, DIV. CONSOLIDATED GROCERS CORP. | | | PWRC |
| 5896 | RMCX | *READE MANUFACTURING CO., INC. | | | PWRC |
| 5897 | RMCX | +REYNOLDS METALS COMPANY | | | PWRC |
| 5898 | RMCX | Reynolds Metals | | | RSRV |
| 5899 | RMCX | REYNOLDS METALS COMPANY | | | SCAC3 |
| 5900 | RMCY | REAL MCCOY COACH LINES, THE | | | SCAC3 |
