| 1 | RCO | Aero Renta de Coahuila, S.A. de C.V. | Callsign: Aerocoahuila, | MEX | AVCODES |
| 2 | RCO | Aero Renta De Coahuila | | | ICAO1 |
| 3 | RCO | Rail Corporation New South Wales | Real: RaiCorp | AUS | TRAFFIC |
| 4 | RCO | Railco, a.s. | | CZ | VKM |
| 5 | RCOC | RACO COMMERCIAL SYSTEMS | | | SCAC3 |
| 6 | RCOC | REAL COTE INC | | | SCAC4 |
| 7 | RCOG | RESCOM COATING | | | SCAC4 |
| 8 | RCOH | RED COACH | | | SCAC4 |
| 9 | RCOI | RICO TRANSPORTATION INC | | | SCAC4 |
| 10 | RCOL | ROBINSON CONCRETE INC | | | SCAC4 |
| 11 | RCON | RAIL CONNECT TRANSPORTATION AND DIS | | | SCAC4 |
| 12 | RCOO | ROSE CONSTRUCTION | | | SCAC3 |
| 13 | RCOP | RICE OIL CO INC | | | SCAC4 |
| 14 | RCOQ | ROSCOE SHIPPING | | | SCAC3 |
| 15 | RCOQ | RICHERSON OIL LLC | | | SCAC4 |
| 16 | RCOR | RAMCO TRUCKING INC | | | SCAC4 |
| 17 | RCOR | Rail Corporation New South Wales | Real: RC | AUS | TRAFFIC |
| 18 | RCOS | Railco Services, s.r.o. | | CZ | VKM |
| 19 | RCOU | ROYAL CARGO, INC. | | RP | BIC |
| 20 | RCOV | ROJAS CASTILLO, OSCAR DAVID | | | SCAC4 |
| 21 | RCOW | ROMANOW CONTAINER | | | SCAC4 |
| 22 | RCOX | Union Tank Car Co. | added 10/2003; 7/2005 | | NAKINA |
| 23 | RCOX | BP Products North America Inc. | added 1/2003; eliminated 10/2003 | | NAKINA |
| 24 | RCOX | Amoco Oil Co. | added 7/2000; 7/2000; eliminated 1/2003 | | NAKINA |
| 25 | RCOX | Arco Products Co. | eliminated 7/2000 | | NAKINA |
| 26 | RCOX | Arco Products Co., Division of Atlantic Richfield Co. | added 10/1991; 1/1994 | | NAKINA |
| 27 | RCOX | Arco Products Co., Division of Atlantic Richfield Co. | added 10/91; 1/94 | | NRHS |
| 28 | RCOX | Arco Products Co. | eliminated 7/2000 | | NRHS |
| 29 | RCOX | Amoco Oil Co. | added 7/2000; 7/2000 | | NRHS |
| 30 | RCOX | UNION TANK CAR CO., LESSEE BP PRODUCTS NORTH AMERICA INC. [ARCO PRODUCTS CO., DIV OF ATLANTIC RICHFIELD COMPANY] | | | PWRC |
| 31 | RCOX | Arco Products | | | RSRV |
| 32 | RCOX | UNION TANK CAR COMPANY | | | SCAC4 |
