| 8801 | RSTV | Rinteln-Stadthagener Verkehrs GmbH | | DE | VKM |
| 8802 | RSTW | ROTTERDAM SHIPPING & TRADING B V | | | SCAC4 |
| 8803 | RSTX | RSTX Inc. | added 1/1972; 1/1975-1/1980; eliminated 10/1985; added 1/1986; eliminated 10/1988 | | NAKINA |
| 8804 | RSTX | RSP Motor Transport Co. | added 4/1969; 4/1970; eliminated 1/1972 | | NAKINA |
| 8805 | RSTX | RSP Motor Transport Co. | added 4/69; 4/70; eliminated 1/72 | | NRHS |
| 8806 | RSTX | RSTX Inc. | added 1/72; 1/75-1/80; added 1/86; eliminated 10/88 | | NRHS |
| 8807 | RSTX | RSTX INC. [RSP MOTOR TRANSPORT CO.] | | | PWRC |
| 8808 | RSTX | RSTX Inc. | | | RSRV |
| 8809 | RSU | Compania Boliviana de Transporte Aereo Privado Aerosur, S.A. | IATA: 5L, Callsign: Asur, IATA Prefix: 275, Founded in 1992. Ceased operations on 17 May 2012. AOC revoked on 20 July 2012. | BOL | AVCODES |
| 8810 | RSU | Aerosur | IATA: 5L | | ICAO1 |
| 8811 | RSU | Compania Boliviana de Transporte Aereo Privado Aerosur, S.A. | | BOL | TRAFFIC |
| 8812 | RSU | RailSupport | | DE | VKM |
| 8813 | RSUS | ROSEN USA | | | SCAC4 |
| 8814 | RSUT | ROSENAU TRANSPORT LTD | | | SCAC4 |
| 8815 | RSUX | Riley Stoker Corp. | added 1/1968; 4/1970-1/1994; eliminated 7/1998; 7/2000-7/2005 (not listed) | | NAKINA |
| 8816 | RSUX | Riley Stoker Corp. | added 1/68; 4/70-1/94; eliminated 7/98; 7/2000 | | NRHS |
| 8817 | RSUX | RILEY STOKER CORP. | | | PWRC |
| 8818 | RSUX | Riley Stoker Corporation | | | RSRV |
| 8819 | RSUX | RILEY STOKER CORP. | | | SCAC4 |
| 8820 | RSV | Air Services | Callsign: Sernou, | F | AVCODES |
| 8821 | RSV | Red Sky Ventures CC | Callsign: Red Sky, | NAM | AVCODES |
| 8822 | RSV | Red Sky Ventures | | | ICAO1 |
| 8823 | RSV | Reutlinger Stadtverkehrsgesellschaft mbH | | D | TRAFFIC |
| 8824 | RSVC | RELIABLE SERVICE CO | | | SCAC3 |
| 8825 | RSVC | ROSE VALLEY COLONY LTD | | | SCAC4 |
| 8826 | RSVE | REACTION SERVICES INC | | | SCAC3 |
| 8827 | RSVG | Rhein-Sieg Verkehrsgesellschaft mbH | Troisdorf | D | privat-bahn.de |
| 8828 | RSVG | R & S CONTAINER SERVICE LLC | | | SCAC4 |
| 8829 | RSVG | Rhein-Sieg Verkehrsgesellschaft mbH Troisdorf | City: Siegburg | D | TRAFFIC |
| 8830 | RSVK | REED, STEVE TRUCKING LLC | | | SCAC4 |
| 8831 | RSVL | R SCOTTSVILLE LUCKY TOURS | | | SCAC3 |
| 8832 | RSVN | RESERVE INTERNATIONAL SERVICES INC | | | SCAC3 |
| 8833 | RSVP | R S V P TRANSPORTATION INC | | | SCAC3 |
| 8834 | RSVP | RSVP INTERNATIONAL LLC | | | SCAC4 |
| 8835 | RSVQ | RESERVE TERMINALS COMPANY | | | SCAC3 |
| 8836 | RSVS | RAIL SERVICES INC | | | SCAC3 |
| 8837 | RSVU | JSC REFSERVICE | | RUS | BIC |
| 8838 | RSVX | Railserv Funding Corp. | eliminated 7/1984; eliminated 7/1986 | | NAKINA |
| 8839 | RSVX | Railserv Management Corp. | added 4/1980; eliminated 7/1984 | | NAKINA |
| 8840 | RSVX | Railserv Management Corp. | added 4/80; eliminated 7/84 | | NRHS |
| 8841 | RSVX | Railserv Funding Corp. | eliminated 7/84; eliminated 7/86 | | NRHS |
| 8842 | RSVX | RAILSERV FUNDING CORP. (RAILSERV MANAGEMENT CORP.) | | | PWRC |
| 8843 | RSVX | Railserv Management Corp | | | RSRV |
| 8844 | RSVY | RODRIGUEZ SARABIA, VIANEY | | | SCAC4 |
| 8845 | RSW | Air Switzerland | Callsign: Air Switerland, Planned startup 4Q02 with ex SQA A340-300 lsd frm Boeing | CH | AVCODES |
| 8846 | RSW | Royal Skyways Co., Ltd. | Callsign: Royal Sky, | T | AVCODES |
| 8847 | RSWI | RAWLS, S W INC | | | SCAC4 |
| 8848 | RSWS | RIDEOUT SUNOCO & WRECKER SERVICE | | | SCAC3 |
| 8849 | RSWZ | TRANSAMERICA LEASING INC [(REAZ) ST. LOUIS SOUTHWESTERN] | | | PWRC |
| 8850 | RSWZ | TAL International | | | RSRV |
| 8851 | RSWZ | TRANSAMERICA LEASING INC | | | SCAC4 |
| 8852 | RSX | Red Sea Airlines | Callsign: Red Sea, | ET | AVCODES |
| 8853 | RSX | A.M. Richter Sons Co. | 7/1930-10/1957; eliminated 10/1959 | | NAKINA |
| 8854 | RSX | A.M. Richter Sons Co. | 4/38-10/57; eliminated 10/59 | | NRHS |
| 8855 | RSX | A. M. RICHTER SONS CO. | | | PWRC |
| 8856 | RSXC | ROSIE EXPRESS CO | | | SCAC4 |
| 8857 | RSXD | RS EXPEDITE INC | | | SCAC4 |
| 8858 | RSXE | ROADSTAR EXPRESS INC | | | SCAC4 |
| 8859 | RSXM | RUSBELS TRANSPORT | | | SCAC4 |
| 8860 | RSXN | RISEN TRANSPORTATION INC | | | SCAC4 |
| 8861 | RSXO | R S D TRANSPORTATION INC | | | SCAC4 |
| 8862 | RSXP | RED STAR EXPRESS LINES OF QUEBEC (1 | | | SCAC3 |
| 8863 | RSXQ | R & S EXPORT TRUCKING CORP | | | SCAC3 |
| 8864 | RSXS | R & S EXPRESS | | | SCAC3 |
| 8865 | RSXS | R & S EXPRESS | | | SCAC4 |
| 8866 | RSXT | R S TRANSPORT | | | SCAC4 |
| 8867 | RSXW | R & S XPRESS | | | SCAC4 |
| 8868 | RSXX | RAIL STUFF LLC | | | SCAC4 |
| 8869 | RSY | The Airline iFly | IATA: H5, Callsign: Russian Sky, Designator H5 recalled by IATA | RUS | AVCODES |
| 8870 | RSY | The Airline iFly | IATA: I4, Callsign: Russian Sky, IATA designator changed to F7. Designator H5 recalled by IATA | RUS | AVCODES |
| 8871 | RSY | The Airline iFly | IATA: F7, Callsign: Russian Sky, IATA designator changed from I4*. Designator H5 recalled by IATA | RUS | AVCODES |
| 8872 | RSYI | RTS DELIVERY INC | | | SCAC4 |
| 8873 | RSYM | ROTH, SYLVESTER M | | | SCAC3 |
| 8874 | RSYN | ROGERS SPRAYERS INC | | | SCAC4 |
| 8875 | RSYS | ROYCE SYSTEMS/SERVICES INC | | | SCAC3 |
| 8876 | RSYT | R S T INC | | | SCAC3 |
| 8877 | RSYX | Refined Sugars, Inc. | added 7/1981; eliminated 10/1986; 1/1994-7/2005 (not listed) | | NAKINA |
| 8878 | RSYX | Refined Syrups & Sugars, Inc. | added 7/1980; eliminated 7/1981 | | NAKINA |
| 8879 | RSYX | Refined Syrups & Sugars, Inc. | added 7/80; eliminated 7/81 | | NRHS |
| 8880 | RSYX | Refined Sugars, Inc. | added 7/81; eliminated 10/86; 1/94-7/2000 | | NRHS |
| 8881 | RSYX | REFINED SUGARS INC. | | | PWRC |
| 8882 | RSYX | Refined Sugars | | | RSRV |
| 8883 | RSYX | REFINED SUGARS INC. | | | SCAC4 |
| 8884 | RSZ | Air Service State Company | Callsign: Hunser, | H | AVCODES |
| 8885 | RSZT | REED SPECIALIZED TRANSPORT INC | | | SCAC4 |
| 8886 | RT | Airlines of South Australia | ICAO: LRT, Name changed from Lincoln Airlines Pty Ltd. | AUS | AVCODES |
| 8887 | RT | Lincoln Airlines Pty Ltd. | ICAO: LRT, Name changed to Airlines of South Australia | AUS | AVCODES |
| 8888 | RT | Transportes Aéreos de Timor | Callsign: TAT, | TL | AVCODES |
| 8889 | RT | Air Tungaru | ICAO: TUN, Callsign: Tungaru, Desigantor RT recalled by IATA | KIR | AVCODES |
| 8890 | RT | Air Turquoise SAS | ICAO: RTQ, Ceased operations on 02 August 2006. | F | AVCODES |
| 8891 | RT | RAK Airways | ICAO: RKM, Callsign: Rakair, Founded in 2006. Suspended operations 01 January 2014. Desigantor RT recalled by IATA | UAE | AVCODES |
| 8892 | RT | Rainbow Airlines (Private) Limited | ICAO: RAT, Callsign: Raindrop, Planned to commence operation on 25 January 2017. | ZW | AVCODES |
| 8893 | RT | JSC UVT aero | ICAO: UVT, Callsign: Tat-Jet, Air Operators licence issued on 8th of July 2015. | RUS | AVCODES |
| 8894 | RT | ISG Cleveland Works Ry. Co. d/b/a Cleveland Works Ry. Co. | added 10/2002; 7/2005 | | NAKINA |
| 8895 | RT | The River Terminal Ry. Co. | 8/1920-7/2000; eliminated 10/2002 | | NAKINA |
| 8896 | RT | The River Terminal Ry. Co. | 4/38-7/2000 | | NRHS |
| 8897 | RT | *RIVER TERMINAL RAILWAY COMPANY | | | PWRC |
| 8898 | RT | +ISG CLEVELAND WORKS RWY. CO. d/b/a CLEVELAND WORKS RWY. CO. | | | PWRC |
| 8899 | RT | River Terminals Railway | | | RSRV |
| 8900 | RT | | City: Reutlingen | D | TRAFFIC |
