| 7701 | RPTN | RAPID TRANSPORT INC | | | SCAC3 |
| 7702 | RPTN | R P M TRANSIT | | | SCAC4 |
| 7703 | RPTO | REBEL PETROLEUM TRANSPORT INC | | | SCAC3 |
| 7704 | RPTO | R P TRANSPORT | | | SCAC4 |
| 7705 | RPTQ | RAPID TRANSIT CO | | | SCAC3 |
| 7706 | RPTQ | R P TRUCKING CORP | | | SCAC4 |
| 7707 | RPTR | R P TRUCKING | | | SCAC3 |
| 7708 | RPTS | R P T S EXPRESS | | | SCAC4 |
| 7709 | RPTT | RPT TRANSPORTATION INC | | | SCAC4 |
| 7710 | RPTV | ROJAS PETROLEUM TRANSPORTATION | | | SCAC4 |
| 7711 | RPTW | R P TRAILER & WRECKER SERVICE INC | | | SCAC3 |
| 7712 | RPTW | REILLY, PAT TRUCKING INC | | | SCAC4 |
| 7713 | RPTX | *REPUBLIC OIL CO. | | | PWRC |
| 7714 | RPTY | RP TRUCKING LLC | | | SCAC4 |
| 7715 | RPUD | RANDLEMANS PICK-UP & DELIVERY SERVI | | | SCAC3 |
| 7716 | RPUI | RAPID UNITED STEEL HAULERS INC | | | SCAC3 |
| 7717 | RPUM | ROSEVELT TRUCK LINES LLC | | | SCAC4 |
| 7718 | RPVSB | REMONT I PROIZVODNJA ŽELJEZNIČKIH VOZILA d.o.o. | | HR | VKM |
| 7719 | RPWD | ROLOPLAST WINDOWS | | | SCAC4 |
| 7720 | RPWZ | (REAZ) RETIRED 04-06-93 ATP(ACI2492) | | | PWRC |
| 7721 | RPX | BAC Express Airlines Limited | Callsign: Rapex, Name changed to HD Air Limited | GB | AVCODES |
| 7722 | RPX | HD Air Limited | Callsign: Rapex, Name changed from BAC Express Airlines Limited. | GB | AVCODES |
| 7723 | RPX | BAC Express Airlines | | | ICAO1 |
| 7724 | RPX | Shell Oil Co., Inc. | 1/1941-4/1947 | | NAKINA |
| 7725 | RPX | Shell Petroleum Corp. | 4/1938 | | NAKINA |
| 7726 | RPX | Roxana Petroleum Corp. | 7/1937 | | NAKINA |
| 7727 | RPX | Roxana Petroleum Corp. (Shell Petroleum Corp.) | 7/1930-7/1935 | | NAKINA |
| 7728 | RPX | Roxana Petroleum Corp. | 8/1920-7/1923 | | NAKINA |
| 7729 | RPX | Roxana Petroleum Co. of Oklahoma | 8/1920 | | NAKINA |
| 7730 | RPX | Roxana Petroleum Corp. (Shell Petroleum Corp.) | Apr-38 | | NRHS |
| 7731 | RPX | SHELL OIL CO. [ROXANA PETROLEUM CORP.] | | | PWRC |
| 7732 | RPXP | R P EXPRESS | | | SCAC3 |
| 7733 | RPXR | RAPID EXPRESS INC | | | SCAC3 |
| 7734 | RPXS | RAPID EXPRESS INC | | | SCAC3 |
| 7735 | RPXT | RAP TRANSPORT | | | SCAC4 |
| 7736 | RQ | Swisswings AG | ICAO: RQX, Callsign: Swisswings, Ceased Operations on 08 April 2002. Name changed from Air Engiadina / Operated as KLM Alps. ICAO Callsign changed from Engiadina | CH | AVCODES |
| 7737 | RQ | Air Engiadina | ICAO: RQX, Callsign: Engiadina, Name changed to Swisswings Airlines on 01 April 2001. Operates as KLM Alps | CH | AVCODES |
| 7738 | RQ | Swisswings Airlines | ICAO: RQX, Callsign: Engiadina, ICAO Callsign changed to Swisswings. Name changed from Air Engiadina / Operated as KLM Alps | CH | AVCODES |
| 7739 | RQ | International Synthetic Rubber Co. Ltd. | | GB | AVCODES |
| 7740 | RQ | Arab Wing Nigeria Ltd. | Callsign: Romeo Quebec, | WAN | AVCODES |
| 7741 | RQ | Kam Air | ICAO: KMF, Callsign: Kamgar, IATA Prefix: 384, | AFG | AVCODES |
| 7742 | RQA | Royale Airlines International | Callsign: Royale, Ceased operations. | EAK | AVCODES |
| 7743 | RQAX | RailQuest America, Inc. | 7/2005 (not listed) | | NAKINA |
| 7744 | RQAX | RAILQUEST AMERICA, INC. | | | PWRC |
| 7745 | RQAX | RailQuest America | | | RSRV |
| 7746 | RQBI | ROAD QUEST BROKERAGE INC | | | SCAC4 |
| 7747 | RQCT | R C T INC | | | SCAC4 |
| 7748 | RQDL | RANDY QUICK DELIVERY | | | SCAC4 |
| 7749 | RQDQ | RITE QUIK DELIVERY CO | | | SCAC3 |
| 7750 | RQDQ | RAINBOW IRRIGATION AND EQUIPMENT IN | | | SCAC4 |
| 7751 | RQEC | ROBO EXPRESS COMPANY | | | SCAC3 |
| 7752 | RQEN | RENA NAVIGATION COMPANY LIMITED | | | SCAC3 |
| 7753 | RQLI | REDLINE LOGISTICS INC | | | SCAC4 |
| 7754 | RQLN | RUDISILL LOGISTICS INC | | | SCAC4 |
| 7755 | RQLS | RAQUETTE LAKE SUPPLY CO INC | | | SCAC4 |
| 7756 | RQMQ | REYES MANRIQUEZ, JULIA | | | SCAC4 |
| 7757 | RQPM | R P M HARBOR SERVICES INC | | | SCAC4 |
| 7758 | RQPR | REMOLQUES DE PUERTO RICO INC | | | SCAC3 |
| 7759 | RQPR | REMOLQUES DE PUERTO RICO INC | | | SCAC4 |
| 7760 | RQPT | RPM TRUCKLOAD INC | | | SCAC4 |
| 7761 | RQSI | RTD QUALITY SERVICES INC | | | SCAC4 |
| 7762 | RQSL | RELIABLE LOGISTICS SOLUTIONS LLC | | | SCAC4 |
| 7763 | RQT | Airquest Aviation, LP | Callsign: Air Quest, | USA | AVCODES |
| 7764 | RQTC | ROYAL TANKERS CORPORATION | | | SCAC3 |
| 7765 | RQTG | R Q TRUCKING | | | SCAC4 |
| 7766 | RQTH | ROMQUEST TECHNOLOGIES | | | SCAC4 |
| 7767 | RQUD | RUDER BOSKOVIC SHIPPING COMPANY LTD | | | SCAC3 |
| 7768 | RQWD | ROCQUEMORE, WAYNE D | | | SCAC3 |
| 7769 | RQX | Swisswings AG | IATA: RQ, Callsign: Swisswings, Ceased Operations on 08 April 2002. Name changed from Air Engiadina / Operated as KLM Alps. ICAO Callsign changed from Engiadina | CH | AVCODES |
| 7770 | RQX | Air Engiadina | IATA: RQ, Callsign: Engiadina, Name changed to Swisswings Airlines on 01 April 2001. Operates as KLM Alps | CH | AVCODES |
| 7771 | RQX | Swisswings Airlines | IATA: RQ, Callsign: Engiadina, ICAO Callsign changed to Swisswings. Name changed from Air Engiadina / Operated as KLM Alps | CH | AVCODES |
| 7772 | RQZF | RODRIQUEZ, FRANK J TRUCKING | | | SCAC3 |
| 7773 | RR | Royal Air Force | ICAO: RFR, Callsign: Rafair, Designator RR recalled by IATA. | GB | AVCODES |
| 7774 | RR | Ryanair Sun S.A. | ICAO: RYS, Callsign: Magic Sun, Name changed to Ryanair Sun S.A. t/a BUZZ. Ryanair Holdings Group | PL | AVCODES |
| 7775 | RR | Ryanair Sun S.A. t/a BUZZ | ICAO: RYS, Callsign: Magic Sun, Name changed from Ryanair Sun S.A. Ryanair Holdings Group | PL | AVCODES |
| 7776 | RR | Consolidated Rail Corp. | added 10/1980; 1/1994; eliminated 7/1999 | | NAKINA |
| 7777 | RR | Raritan River R.R. Co. | 7/1923-1/1980; eliminated 7/1980 | | NAKINA |
| 7778 | RR | Raritan River R.R. Co. | 4/38-1/80; eliminated 7/80 | | NRHS |
| 7779 | RR | Consolidated Rail Corp. | added 10/80; 1/94; eliminated 7/99 | | NRHS |
| 7780 | RR | CONSOLIDATED RAIL CORP. [RARITAN RIVER RR] | | | PWRC |
| 7781 | RR | Raritan River Railroad (Conrail) | | | RSRV |
| 7782 | RR | Raritan River R.R. Co. | | USA | TRAFFIC |
| 7783 | RR | Rautaruukki Oy | | FI | VKM |
| 7784 | RRA | Royal Rwanda Airlines | Callsign: Royal Rwanda, | RWA | AVCODES |
| 7785 | RRA | Royal Rwanda Airlines | | | ICAO1 |
| 7786 | RRAA | R R TRUCKING LLC | | | SCAC4 |
| 7787 | RRAC | ROCHA, R TRUCKING | | | SCAC4 |
| 7788 | RRAE | R & R TRANSPORTATION | | | SCAC4 |
| 7789 | RRAG | RUSSELL RIDGE TRANSPORT INC | | | SCAC4 |
| 7790 | RRAH | RIO REBELS TRUCKING | | | SCAC4 |
| 7791 | RRAJ | R & R TAKHAR TRANSPORTATION LTD | | | SCAC4 |
| 7792 | RRAP | RAMIREZ RANCH | | | SCAC4 |
| 7793 | RRAQ | R R & ASSOCIATES LLC | | | SCAC4 |
| 7794 | RRAR | UMLER TEST ROAD NO.13 | | | PWRC |
| 7795 | RRAR | RSR RACING LLC | | | SCAC4 |
| 7796 | RRAV | R & R CLASSIC CARS | | | SCAC4 |
| 7797 | RRAY | RICHARDSON, RAY TRUCKING | | | SCAC3 |
| 7798 | RRB | Aero Club de Castellon | | E | AVCODES |
| 7799 | RRB | RAMPART RANGE CORPORATION | | | PWRC |
| 7800 | RRB | RRB Slovakia, s.r.o. | | SK | VKM |
