| 1 | RC | Atlantic Airways Faroe Islands | ICAO: FLI, Callsign: Faroeline, IATA Prefix: 767, | FR | AVCODES |
| 2 | RC | Republic Airlines | ICAO: REP, Merged into Northwest Airlines | USA | AVCODES |
| 3 | RC | Royal Air Cambodge | Designator RU recalled by IATA | K | AVCODES |
| 4 | RC | Rosslyn Connecting R.R. Co. | 1/1975-1/1980 | | NAKINA |
| 5 | RC | Rosslyn Connecting R.R. Co. | 1/75-1/80 | | NRHS |
| 6 | RC | CONSOLIDATED RAIL CORP. [ROSSLYN CONNECTING RR.] | | | PWRC |
| 7 | RC | Rosslyn Connecting Railroad | | | RSRV |
| 8 | RC | Regional Connect | | AUS | TRAFFIC |
| 9 | RC | Rail Contact GmbH | | DE | VKM |
| 10 | RCA | Richland Aviation | Callsign: Richland, | USA | AVCODES |
| 11 | RCA | Richland Aviation | | | ICAO1 |
| 12 | RCA | Rail Cargo Austria | | A | TRAFFIC |
| 13 | RCAB | RAILCAB INC | | | SCAC3 |
| 14 | RCAC | RCA TRUCKING | | | SCAC4 |
| 15 | RCAF | R C TRUCK BROKERAGE LLC | | | SCAC4 |
| 16 | RCAF | Royal Canadian Air Force | | CDN | TRAFFIC |
| 17 | RCAI | ROSE CITY APPLIANCE INSTALLATION | | | SCAC3 |
| 18 | RCAM | ROCHESTER ARMORED CAR CO | | | SCAC3 |
| 19 | RCAN | RALCAN HOLDING INC | | | SCAC4 |
| 20 | RCAP | RI-CAR TRANSPORTATION CO INC | | | SCAC3 |
| 21 | RCAR | RICAL CONTAINER LINE LTD | | | SCAC4 |
| 22 | RCAS | ROTA-CARRUS CORPORATION | | | SCAC3 |
| 23 | RCAT | ROCKETLINE CARRIER SERVICES LLC | | | SCAC4 |
| 24 | RCAV | RCS LOGISTICS | | | SCAC4 |
| 25 | RCAY | RUTHERFORD COUNTY TRANSPORT | | | SCAC4 |
| 26 | RCB | Real Aero Club de Baleares | Callsign: Baleares, | E | AVCODES |
| 27 | RCB | Real Aero Club De Baleares | | | ICAO1 |
| 28 | RCB | Rail Cargo Berlin GmbH | Berlin | D | privat-bahn.de |
| 29 | RCB | Rail Cargo Berlin GmbH | | D | TRAFFIC |
| 30 | RCB | Rail Cargo Berlin | | DE | VKM |
| 31 | RCBA | RIVER CITY TRANSPORTATION INC | | | SCAC4 |
| 32 | RCBB | RECOB BROTHERS TRUCKING | | | SCAC3 |
| 33 | RCBC | ROYAL CROWN BEVERAGE CO INC | | | SCAC3 |
| 34 | RCBD | RICHARDSON, B TRANSPORT LTD | | | SCAC4 |
| 35 | RCBE | ROSIN, CARL TRUCKING LLC | | | SCAC4 |
| 36 | RCBG | ROYAL CROWN BEVERAGE CO | | | SCAC3 |
| 37 | RCBH | RAMO CARRIERS INC | | | SCAC4 |
| 38 | RCBJ | RCS TRUCKING LLC | | | SCAC4 |
| 39 | RCBK | R CUBED TRUCKING | | | SCAC4 |
| 40 | RCBL | ROGERS CABLE COMMUNICATIONS INC | | | SCAC4 |
| 41 | RCBS | RACHELS BUS COMPANY INC | | | SCAC3 |
| 42 | RCBT | ROARING CAMP & BIG TREES NARROW GAUGE RAILROAD | | | PWRC |
| 43 | RCBT | R C B TRUCKING INC | | | SCAC3 |
| 44 | RCBT | RUVALCABA TRUCKING | | | SCAC4 |
| 45 | RCBV | RIVA CRUCES INTERNACIONALES | | | SCAC4 |
| 46 | RCBV | Regio Calatori Srl | | RO | TRAFFIC |
| 47 | RCC | Air Charters Eelde | Callsign: Racer, Name changed to Air Charters Europe B.V. | NL | AVCODES |
| 48 | RCC | Air Charters Europe B.V. | Callsign: Racer, Name changed from Air Charters Eelde | NL | AVCODES |
| 49 | RCC | Air Charters Eelde | | | ICAO1 |
| 50 | RCCB | ROSS CO CONTRACTING INC | | | SCAC4 |
| 51 | RCCF | REEVES CONSTRUCTION CO | | | SCAC4 |
| 52 | RCCF | RC-CF TRANS SRL | | RO | VKM |
| 53 | RCCG | RBTC INC | | | SCAC3 |
| 54 | RCCG | RC CARGO LOGISTICS | | | SCAC4 |
| 55 | RCCH | ROYALTY COACH CHARTER & TOURS | | | SCAC3 |
| 56 | RCCH | ROWE TRANSFER INC | | | SCAC4 |
| 57 | RCCI | RIVER CITY CARRIERS INC | | | SCAC3 |
| 58 | RCCJ | RATHJE CONSTRUCTION CO | | | SCAC4 |
| 59 | RCCL | RAM CONTRACT CARRIERS LIMITED | | | SCAC3 |
| 60 | RCCM | R & C EXPRESS LLC | | | SCAC4 |
| 61 | RCCN | RCC TRANSPORT INC | | | SCAC3 |
| 62 | RCCO | R C CARTAGE CO INC | | | SCAC3 |
| 63 | RCCP | R C CORPORATION | | | SCAC3 |
| 64 | RCCQ | READY CARTAGE CO | | | SCAC3 |
| 65 | RCCR | RAIL CARRIER COST RECOVERY TARIFF ( | | | SCAC3 |
| 66 | RCCR | ROCKY CLIFF CARRIERS LLC | | | SCAC4 |
| 67 | RCCT | RACECOURSE TRANSPORTATION INC | | | SCAC3 |
| 68 | RCCT | ROCKFORD CHARTER COACH LLC | | | SCAC4 |
| 69 | RCCU | ROYAL CARIBBEAN CRUISE LINE | | | SCAC3 |
| 70 | RCCW | RELIABLE CONTRACTING CO INC | | | SCAC4 |
| 71 | RCCX | Roanoke Cement Co. | 7/2005 (not listed) | | NAKINA |
| 72 | RCCX | Roanoke Cement Co. LLC | added 10/2003; eliminated 4/2004 | | NAKINA |
| 73 | RCCX | Relco Tank Line, Inc. | added 10/1986; eliminated 7/1987 | | NAKINA |
| 74 | RCCX | Relco Tank Line Division of Relco Nevada Corp. | added 10/1976; 1/1980; eliminated 10/1986 | | NAKINA |
| 75 | RCCX | Relco Tank Line, Inc. | added 4/1972; 1/1975; eliminated 10/1976 | | NAKINA |
| 76 | RCCX | Relco Leasing Corp. | added 7/1969; 4/1970; eliminated 4/1972 | | NAKINA |
| 77 | RCCX | Relco Tank Line | added 4/1969; eliminated 7/1969 | | NAKINA |
| 78 | RCCX | Relco Tank Line | added 4/69; eliminated 7/69 | | NRHS |
| 79 | RCCX | Relco Leasing Corp. | added 7/69; 4/70; eliminated 4/72 | | NRHS |
| 80 | RCCX | Relco Tank Line, Inc. | added 4/72; 1/75 | | NRHS |
| 81 | RCCX | Relco Tank Line Division of Relco Nevada Corp. | 1/80; eliminated 10/86 | | NRHS |
| 82 | RCCX | Relco Tank Line, Inc. | added 10/86; eliminated 7/87 | | NRHS |
| 83 | RCCX | *RELCO NEVADA CORP., RELCO TANK LINE DIV. | | | PWRC |
| 84 | RCCX | +ROANOKE CEMENT CO. LLC | | | PWRC |
| 85 | RCCX | Relco Nevada Corporation | | | RSRV |
| 86 | RCCX | ROANOKE CEMENT COMPANY LLC | | | SCAC4 |
| 87 | RCCY | REED CANDLE COMPANY | | | SCAC4 |
| 88 | RCCZ | REISS COAL COMPANY | | | PWRC |
| 89 | RCD | Real Aeroclub de Tenerife | Callsign: Aeroclub, | E | AVCODES |
| 90 | RCD | Real Aeroclub De Ternerife | | | ICAO1 |
| 91 | RCDC | ROCHESTER CARTING COMPANY | | | SCAC3 |
| 92 | RCDE | RIVER CITY DELIVERY INC | | | SCAC3 |
| 93 | RCDE | RENT A PC INC | | | SCAC4 |
| 94 | RCDF | RICARD FARMS | | | SCAC4 |
| 95 | RCDG | R C DISTRIBUTING INC | | | SCAC3 |
| 96 | RCDG | RECICLADORA DURANGO | | | SCAC4 |
| 97 | RCDK | Railcare Danmark A/S | 2007 - | DK | jernbanen.dk |
| 98 | RCDK | R.C.D. TRUCKING, INC | | | SCAC3 |
| 99 | RCDK | R C D TRUCKING INC | | | SCAC4 |
| 100 | RCDK | Railcare Danmark A/S | | DK | VKM |
