| 1701 | RCMX | SERVICES UNLIMITED | | | SCAC4 |
| 1702 | RCMZ | RAWHIDE COAL MINE | | | PWRC |
| 1703 | RCN | Race Cargo Airlines (Nig) Limited | Callsign: Speed Cargo, | WAN | AVCODES |
| 1704 | RCN | Railcenter Nürnberg | Nürnberg | D | privat-bahn.de |
| 1705 | RCN | Rail Center Nürnberg GmbH & Co. KG | | D | TRAFFIC |
| 1706 | RCN | RCN rail center Nürnberg GmbH & Co Kg | | DE | VKM |
| 1707 | RCNA | RINCON ASSOCIATES INC | | | SCAC3 |
| 1708 | RCNA | RCN TRUCKING | | | SCAC4 |
| 1709 | RCNC | R & C CONTRACTING LLC | | | SCAC4 |
| 1710 | RCNI | RADCO CONSTRUCTION INC | | | SCAC3 |
| 1711 | RCNL | ROUGHSEA NAVIGATION COMPANY LIMITED | | | SCAC3 |
| 1712 | RCNL | RYCO TRUCK AND CRANE SERVICES LTD | | | SCAC4 |
| 1713 | RCNM | RELOCALISATION C M P | | | SCAC4 |
| 1714 | RCNP | ROAD CONNECTION II INC | | | SCAC4 |
| 1715 | RCNS | R C & SONS TRUCKING | | | SCAC4 |
| 1716 | RCNT | ROGERS CONSTRUCTION | | | SCAC3 |
| 1717 | RCNV | R-CON SERVICES INC | | | SCAC4 |
| 1718 | RCNX | RAILCAR NEBRASKA, INC. | | | PWRC |
| 1719 | RCNX | RAILCAR NEBRASKA, INC. | | | SCAC4 |
| 1720 | RCO | Aero Renta de Coahuila, S.A. de C.V. | Callsign: Aerocoahuila, | MEX | AVCODES |
| 1721 | RCO | Aero Renta De Coahuila | | | ICAO1 |
| 1722 | RCO | Railco, a.s. | | CZ | VKM |
| 1723 | RCOC | RACO COMMERCIAL SYSTEMS | | | SCAC3 |
| 1724 | RCOC | REAL COTE INC | | | SCAC4 |
| 1725 | RCOG | RESCOM COATING | | | SCAC4 |
| 1726 | RCOH | RED COACH | | | SCAC4 |
| 1727 | RCOI | RICO TRANSPORTATION INC | | | SCAC4 |
| 1728 | RCOL | ROBINSON CONCRETE INC | | | SCAC4 |
| 1729 | RCON | RAIL CONNECT TRANSPORTATION AND DIS | | | SCAC4 |
| 1730 | RCOO | ROSE CONSTRUCTION | | | SCAC3 |
| 1731 | RCOP | RICE OIL CO INC | | | SCAC4 |
| 1732 | RCOQ | ROSCOE SHIPPING | | | SCAC3 |
| 1733 | RCOQ | RICHERSON OIL LLC | | | SCAC4 |
| 1734 | RCOR | RAMCO TRUCKING INC | | | SCAC4 |
| 1735 | RCOR | Rail Corporation New South Wales | Real: RC | AUS | TRAFFIC |
| 1736 | RCOS | Railco Services, s.r.o. | | CZ | VKM |
| 1737 | RCOU | ROYAL CARGO, INC. | | RP | BIC |
| 1738 | RCOV | ROJAS CASTILLO, OSCAR DAVID | | | SCAC4 |
| 1739 | RCOW | ROMANOW CONTAINER | | | SCAC4 |
| 1740 | RCOX | Union Tank Car Co. | added 10/2003; 7/2005 | | NAKINA |
| 1741 | RCOX | BP Products North America Inc. | added 1/2003; eliminated 10/2003 | | NAKINA |
| 1742 | RCOX | Amoco Oil Co. | added 7/2000; 7/2000; eliminated 1/2003 | | NAKINA |
| 1743 | RCOX | Arco Products Co. | eliminated 7/2000 | | NAKINA |
| 1744 | RCOX | Arco Products Co., Division of Atlantic Richfield Co. | added 10/1991; 1/1994 | | NAKINA |
| 1745 | RCOX | Arco Products Co., Division of Atlantic Richfield Co. | added 10/91; 1/94 | | NRHS |
| 1746 | RCOX | Arco Products Co. | eliminated 7/2000 | | NRHS |
| 1747 | RCOX | Amoco Oil Co. | added 7/2000; 7/2000 | | NRHS |
| 1748 | RCOX | UNION TANK CAR CO., LESSEE BP PRODUCTS NORTH AMERICA INC. [ARCO PRODUCTS CO., DIV OF ATLANTIC RICHFIELD COMPANY] | | | PWRC |
| 1749 | RCOX | Arco Products | | | RSRV |
| 1750 | RCOX | UNION TANK CAR COMPANY | | | SCAC4 |
| 1751 | RCP | Aerocorp, S.A. de C.V. | Callsign: Aerocorpsa, | MEX | AVCODES |
| 1752 | RCP | Aerocorp | | | ICAO1 |
| 1753 | RCPA | RECOLECTORA DE CARTON Y PAPEL | | | SCAC4 |
| 1754 | RCPE | RED CARPET EXPRESS INC | | | SCAC3 |
| 1755 | RCPI | R C TRANSPORTATION INC | | | SCAC3 |
| 1756 | RCPM | R E C PETES | | | SCAC3 |
| 1757 | RCPM | RCP TRUCKING | | | SCAC4 |
| 1758 | RCPN | RICH-CO TRANSPORTATION | | | SCAC3 |
| 1759 | RCPP | RESCRAFT PLASTIC PRODUCTS | | | SCAC4 |
| 1760 | RCPQ | RENVILLE COUNTY CO-OP | | | SCAC3 |
| 1761 | RCPR | RCP REMOVAL CO LTD | | | SCAC3 |
| 1762 | RCPS | RED CARPET MOTOR COACH | | | SCAC3 |
| 1763 | RCPX | SC Rail Leasing America, Inc. d/b/a Southern Illinois Railcar Co. | added 1/2008 | | NAKINA |
| 1764 | RCPX | Southern Illinois Railcar Co. | added 10/2000; eliminated 10/2004; 7/2005 (not listed); eliminated 1/2008 | | NAKINA |
| 1765 | RCPX | Railcar, Ltd. | added 7/1997; 7/2000; eliminated 10/2000 | | NAKINA |
| 1766 | RCPX | Railcar, Ltd. | added 7/97; 7/2000; eliminated 10/2000 | | NRHS |
| 1767 | RCPX | Southern Illinois Railcar Co. | added 10/2000 | | NRHS |
| 1768 | RCPX | SC RAIL LEASING AMERICA, INC. D/B/A SOUTHERN ILLINOIS RAILCAR CO. [RAILCAR LIMITED] | | | PWRC |
| 1769 | RCPX | Southern Illinois Railcar | | | RSRV |
| 1770 | RCQ | Aerolineas Regionales, S.A. de C.V. | IATA: 3R, IATA Prefix: 720, | MEX | AVCODES |
| 1771 | RCQ | Aerolineas Regionales, S.A. de C.V. | IATA: F2, IATA Prefix: 720, Designator F2 recalled by IATA | MEX | AVCODES |
| 1772 | RCQ | Aerolineas Regionales | | | ICAO1 |
| 1773 | RCQS | RCS TRANSPORT LLC | | | SCAC4 |
| 1774 | RCQT | ROYAL CREST TRANSPORTATION INC | | | SCAC3 |
| 1775 | RCR | Aircroatia | Callsign: Aero-Croat, | HR | AVCODES |
| 1776 | RCR | Aero Charter Los Cabos, S.A. de C.V. | Callsign: Aerochar, | MEX | AVCODES |
| 1777 | 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 |
| 1778 | RCR | Rail Cargo Romania | | RO | TRAFFIC |
| 1779 | RCRA | RAYVALS, CRAIG | | | SCAC4 |
| 1780 | RCRC | R C R ENTERPRISE INC | | | SCAC3 |
| 1781 | RCRD | RECORD TRANSPORT, INC | | | SCAC3 |
| 1782 | RCRD | RECORD TRANSPORT INC | | | SCAC4 |
| 1783 | RCRE | RESOURCE CONSERVATION RECOVERY EXPR | | | SCAC3 |
| 1784 | RCRH | RCR ENTERPRISES LLC | | | SCAC4 |
| 1785 | RCRI | RCR INC | | | SCAC3 |
| 1786 | RCRJ | REEVES CRICKET RANCH INC | | | SCAC4 |
| 1787 | RCRK | RICHARDS TRUCKING COMPANY | | | SCAC3 |
| 1788 | RCRK | REITA CREEK SCOREBOARD | | | SCAC4 |
| 1789 | RCRL | ROYAL CITY ROAD LINE INC | | | SCAC4 |
| 1790 | RCRM | ROACH ENERGY | | | SCAC4 |
| 1791 | RCRN | R C TRUCKING | | | SCAC3 |
| 1792 | RCRN | R C TRANSPORT INC | | | SCAC4 |
| 1793 | RCRO | RESCATE, RON | | | SCAC3 |
| 1794 | RCRO | RESCATE, RON | | | SCAC4 |
| 1795 | RCRO | RAIL CARGO ROMANIA SRL | | RO | VKM |
| 1796 | RCRP | RICHARDS, G M ENTERPRISES INC | | | SCAC3 |
| 1797 | RCRR | Red Coat Road & Rail Ltd. | 7/2000-7/2005 | | NAKINA |
| 1798 | RCRR | Red Coat Road & Rail Ltd. | Jul-00 | | NRHS |
| 1799 | RCRR | RED COAT ROAD & RAIL LTD. | | | PWRC |
| 1800 | RCRR | Red Coat Road and Rail Limited | | | RSRV |
