| 1601 | RCPX | Southern Illinois Railcar Co. | added 10/2000; eliminated 10/2004; 7/2005 (not listed); eliminated 1/2008 | NAKINA | |
| 1602 | RCPX | Railcar, Ltd. | added 7/1997; 7/2000; eliminated 10/2000 | NAKINA | |
| 1603 | RCPX | Railcar, Ltd. | added 7/97; 7/2000; eliminated 10/2000 | NRHS | |
| 1604 | RCPX | Southern Illinois Railcar Co. | added 10/2000 | NRHS | |
| 1605 | RCPX | SC RAIL LEASING AMERICA, INC. D/B/A SOUTHERN ILLINOIS RAILCAR CO. [RAILCAR LIMITED] | PWRC | ||
| 1606 | RCPX | Southern Illinois Railcar | RSRV | ||
| 1607 | RCQ | Aerolineas Regionales | ICAO1 | ||
| 1608 | RCQS | RCS TRANSPORT LLC | SCAC4 | ||
| 1609 | RCQT | ROYAL CREST TRANSPORTATION INC | SCAC3 | ||
| 1610 | RCR | Rail Cargo Romania | RO | TRAFFIC | |
| 1611 | RCRA | RAYVALS, CRAIG | SCAC4 | ||
| 1612 | RCRC | R C R ENTERPRISE INC | SCAC3 | ||
| 1613 | RCRD | RECORD TRANSPORT, INC | SCAC3 | ||
| 1614 | RCRD | RECORD TRANSPORT INC | SCAC4 | ||
| 1615 | RCRE | RESOURCE CONSERVATION RECOVERY EXPR | SCAC3 | ||
| 1616 | RCRH | RCR ENTERPRISES LLC | SCAC4 | ||
| 1617 | RCRI | RCR INC | SCAC3 | ||
| 1618 | RCRJ | REEVES CRICKET RANCH INC | SCAC4 | ||
| 1619 | RCRK | RICHARDS TRUCKING COMPANY | SCAC3 | ||
| 1620 | RCRK | REITA CREEK SCOREBOARD | SCAC4 | ||
| 1621 | RCRL | ROYAL CITY ROAD LINE INC | SCAC4 | ||
| 1622 | RCRM | ROACH ENERGY | SCAC4 | ||
| 1623 | RCRN | R C TRUCKING | SCAC3 | ||
| 1624 | RCRN | R C TRANSPORT INC | SCAC4 | ||
| 1625 | RCRO | RESCATE, RON | SCAC3 | ||
| 1626 | RCRO | RESCATE, RON | SCAC4 | ||
| 1627 | RCRO | RAIL CARGO ROMANIA SRL | RO | VKM | |
| 1628 | RCRP | RICHARDS, G M ENTERPRISES INC | SCAC3 | ||
| 1629 | RCRR | Red Coat Road & Rail Ltd. | 7/2000-7/2005 | NAKINA | |
| 1630 | RCRR | Red Coat Road & Rail Ltd. | Jul-00 | NRHS | |
| 1631 | RCRR | RED COAT ROAD & RAIL LTD. | PWRC | ||
| 1632 | RCRR | Red Coat Road and Rail Limited | RSRV | ||
| 1633 | RCRR | RED COAT ROAD & RAIL LTD | SCAC4 | ||
| 1634 | RCRT | ROCAR TRUCKING INC | SCAC3 | ||
| 1635 | RCRT | REYES, C R TRANSPORTATION INC | SCAC4 | ||
| 1636 | RCRV | RIVER CITY RUSH DELIVERY INC | SCAC4 | ||
| 1637 | RCRX | Reagent Chemical & Research, Inc. | added 11/1973; 1/1975-7/2005 | NAKINA | |
| 1638 | RCRX | Reagent Chemical & Research, Inc. | added 11/73; 1/75-7/2000 | NRHS | |
| 1639 | RCRX | REAGENT CHEMICAL & RESEARCH INC | PWRC | ||
| 1640 | RCRX | Reagent Chemical and Research | RSRV | ||
| 1641 | RCRX | REAGENT CHEMICAL & RESEARCH INC | SCAC4 | ||
| 1642 | RCRX | Reagent Chemical & Research, Inc. | USA | TRAFFIC | |
| 1643 | RCRY | Raritan Central Ry. LLC | 7/2005 | NAKINA | |
| 1644 | RCRY | RARITAN CENTRAL RWY. LLC | PWRC | ||
| 1645 | RCRY | Raritan Central Railway | RSRV | ||
| 1646 | RCRY | RARITAN CENTRAL RAILWAY LLC | SCAC4 | ||
| 1647 | RCRZ | (CSXT)RETIRED 04-06-93 ATP (ACI 2342) | PWRC | ||
| 1648 | RCSA | RENOWN CO., S.A | SCAC3 | ||
| 1649 | RCSA | RCS TRUCKING & FREIGHT INC | SCAC4 | ||
| 1650 | RCSB | R C COLA-7-UP BOTTLING CO | SCAC3 | ||
| 1651 | RCSC | RITE CONTAINER SERVICE CORP | SCAC3 | ||
| 1652 | RCSC | RCS LOGISTICS INC | SCAC4 | ||
| 1653 | RCSE | RETREAT COVE STUDIO | SCAC4 | ||
| 1654 | RCSF | RCS FARMS | SCAC3 | ||
| 1655 | RCSF | R C SEAFOOD LTD | SCAC4 | ||
| 1656 | RCSG | ROSENBERGERS COLD TRANSPORT INC | SCAC3 | ||
| 1657 | RCSG | RICO SILVA, GONZALO | SCAC4 | ||
| 1658 | RCSH | REED CONTRACTING SERVICES INC | SCAC4 | ||
| 1659 | RCSI | R C FREIGHTWAYS INC | SCAC3 | ||
| 1660 | RCSI | RESEARCH CASTING INTERNATIONAL | SCAC4 | ||
| 1661 | RCSK | RICE, STEVEN TRUCKING | SCAC3 | ||
| 1662 | RCSL | RCS LIMOUSINE SERVICE INC | SCAC3 | ||
| 1663 | RCSL | RCS TRANSPORTATION LLC | SCAC4 | ||
| 1664 | RCSN | R C & SONS INC | SCAC3 | ||
| 1665 | RCSN | RC TRANSFER INC | SCAC4 | ||
| 1666 | RCSO | RICSONS INC | SCAC3 | ||
| 1667 | RCSO | R C S OIL INC | SCAC4 | ||
| 1668 | RCSQ | RCS VAN & STORAGE | SCAC3 | ||
| 1669 | RCSQ | RIVERBANK CARGO SOLUTIONS LLC | SCAC4 | ||
| 1670 | RCSR | ROCKS CRANE SERVICE INC | SCAC3 | ||
| 1671 | RCST | RCS TRUCKING & LEASING CORP | SCAC4 | ||
| 1672 | RCSU | RAIL CONTAINER SERVICES, INC. | SCAC3 | ||
| 1673 | RCSV | RAIL CONTAINER SERVICES INC | SCAC3 | ||
| 1674 | RCSX | Railroad Solutions, LLC | 7/2005 (not listed) | NAKINA | |
| 1675 | RCSX | Railroad Car Service Corp. | added 4/1985; eliminated 1/1987 | NAKINA | |
| 1676 | RCSX | North American Car Corp. | added 7/1960; 4/1961-4/1970; eliminated 10/1974 | NAKINA | |
| 1677 | RCSX | Railway Tank Car Service, Inc. | 1/1946 (not listed); 4/1947-10/1957; eliminated 7/1960 | NAKINA | |
| 1678 | RCSX | Railway Tank Car Service, Inc. | 1/52-10/57; eliminated 7/60 | NRHS | |
| 1679 | RCSX | North American Car Corp. | added 7/60; 4/61-4/70; eliminated 10/74 | NRHS | |
| 1680 | RCSX | Railroad Car Service Corp. | added 4/85; eliminated 1/87 | NRHS | |
| 1681 | RCSX | *NORTH AMERICAN CAR CORP. [RAILWAY TANK CAR SERVICE, INC] | PWRC | ||
| 1682 | RCSX | *RAILROAD CAR SERVICE CORP. | PWRC | ||
| 1683 | RCSX | +RAILCAR SOLUTIONS, LLC | PWRC | ||
| 1684 | RCSX | Red-Corn Scrap Metals | RSRV | ||
| 1685 | RCSX | RAILCAR SOLUTIONS LLC | SCAC4 | ||
| 1686 | RCSY | RELIABLE CARTAGE SERVICES | SCAC4 | ||
| 1687 | RCSZ | RAIL CONTAINER SERVICES, INC. | PWRC | ||
| 1688 | RCSZ | Rail Container Services | RSRV | ||
| 1689 | RCSZ | RAIL CONTAINER SERVICES INC | SCAC4 | ||
| 1690 | RCT | Ryan Air Service | ICAO1 | ||
| 1691 | RCT | Railcare Tåg AB | 2008 - | S | svenska-lok.se |
| 1692 | RCT | Railcare Tåg AB | 2008 | S | TRAFFIC |
| 1693 | RCT | Railcare Tåg AB | SE | VKM | |
| 1694 | RCTB | RIVER CITY TOURS | SCAC3 | ||
| 1695 | RCTC | RICO TILE COMPANY INC | SCAC3 | ||
| 1696 | RCTC | RICHTER TRUCKING | SCAC4 | ||
| 1697 | RCTD | ROCKING C TRUCK LINES INC | SCAC3 | ||
| 1698 | RCTD | ROCKING C TRUCK LINES INC | SCAC4 | ||
| 1699 | RCTF | R C TRANSFER INC | SCAC3 | ||
| 1700 | RCTF | RICO, CHANO TRUCKING INC | SCAC4 |