| 1 | RCR | Aircroatia | Callsign: Aero-Croat, | HR | AVCODES |
| 2 | RCR | Aero Charter Los Cabos, S.A. de C.V. | Callsign: Aerochar, | MEX | AVCODES |
| 3 | RCR | Romcargo Airlines S.r.l. | IATA: NJ, Callsign: Romcargo, IATA Prefix: 690, Name changed from Fly Sky. ICAO designator changed from FSG. | RO | AVCODES |
| 4 | RCR | Rail Cargo Romania | | RO | TRAFFIC |
| 5 | RCRA | RAYVALS, CRAIG | | | SCAC4 |
| 6 | RCRC | R C R ENTERPRISE INC | | | SCAC3 |
| 7 | RCRD | RECORD TRANSPORT, INC | | | SCAC3 |
| 8 | RCRD | RECORD TRANSPORT INC | | | SCAC4 |
| 9 | RCRE | RESOURCE CONSERVATION RECOVERY EXPR | | | SCAC3 |
| 10 | RCRH | RCR ENTERPRISES LLC | | | SCAC4 |
| 11 | RCRI | RCR INC | | | SCAC3 |
| 12 | RCRJ | REEVES CRICKET RANCH INC | | | SCAC4 |
| 13 | RCRK | RICHARDS TRUCKING COMPANY | | | SCAC3 |
| 14 | RCRK | REITA CREEK SCOREBOARD | | | SCAC4 |
| 15 | RCRL | ROYAL CITY ROAD LINE INC | | | SCAC4 |
| 16 | RCRM | ROACH ENERGY | | | SCAC4 |
| 17 | RCRN | R C TRUCKING | | | SCAC3 |
| 18 | RCRN | R C TRANSPORT INC | | | SCAC4 |
| 19 | RCRO | RESCATE, RON | | | SCAC3 |
| 20 | RCRO | RESCATE, RON | | | SCAC4 |
| 21 | RCRO | RAIL CARGO ROMANIA SRL | | RO | VKM |
| 22 | RCRP | RICHARDS, G M ENTERPRISES INC | | | SCAC3 |
| 23 | RCRR | Red Coat Road & Rail Ltd. | 7/2000-7/2005 | | NAKINA |
| 24 | RCRR | Red Coat Road & Rail Ltd. | Jul-00 | | NRHS |
| 25 | RCRR | RED COAT ROAD & RAIL LTD. | | | PWRC |
| 26 | RCRR | Red Coat Road and Rail Limited | | | RSRV |
| 27 | RCRR | RED COAT ROAD & RAIL LTD | | | SCAC4 |
| 28 | RCRT | ROCAR TRUCKING INC | | | SCAC3 |
| 29 | RCRT | REYES, C R TRANSPORTATION INC | | | SCAC4 |
| 30 | RCRV | RIVER CITY RUSH DELIVERY INC | | | SCAC4 |
| 31 | RCRX | Reagent Chemical & Research, Inc. | added 11/1973; 1/1975-7/2005 | | NAKINA |
| 32 | RCRX | Reagent Chemical & Research, Inc. | added 11/73; 1/75-7/2000 | | NRHS |
| 33 | RCRX | REAGENT CHEMICAL & RESEARCH INC | | | PWRC |
| 34 | RCRX | Reagent Chemical and Research | | | RSRV |
| 35 | RCRX | REAGENT CHEMICAL & RESEARCH INC | | | SCAC4 |
| 36 | RCRX | Reagent Chemical & Research, Inc. | | USA | TRAFFIC |
| 37 | RCRY | Raritan Central Ry. LLC | 7/2005 | | NAKINA |
| 38 | RCRY | RARITAN CENTRAL RWY. LLC | | | PWRC |
| 39 | RCRY | Raritan Central Railway | | | RSRV |
| 40 | RCRY | RARITAN CENTRAL RAILWAY LLC | | | SCAC4 |
| 41 | RCRZ | (CSXT)RETIRED 04-06-93 ATP (ACI 2342) | | | PWRC |