| 1601 | RCJM | RICHARDSON, JAMES TRUCKING INC | | | SCAC4 |
| 1602 | RCJP | ROCKIN CJ TRANSPORT | | | SCAC4 |
| 1603 | RCJQ | R C J AGENCY INC | | | SCAC3 |
| 1604 | RCJU | RUM COMPANY, JAMAICA, LTD | | | SCAC3 |
| 1605 | RCJU | RUM COMPANY (JAMAICA) LTD, THE | | | SCAC4 |
| 1606 | RCK | Faroe Jet | IATA: F6, Callsign: Rockrose, Founded in 2005. Ceased operations on 16 December 2006. | FR | AVCODES |
| 1607 | RCK | Faroejet | IATA: F6 | | ICAO1 |
| 1608 | RCKB | RUCK, WILLIAM TRUCKING LIMITED | | | SCAC4 |
| 1609 | RCKC | ROCK CITY CARTAGE | | | SCAC4 |
| 1610 | RCKD | ROCKSTAD, BYRON J | | | SCAC4 |
| 1611 | RCKE | ROCKET TRANSFER COMPANY INC | | | SCAC3 |
| 1612 | RCKE | ROCKET EXPRESS CORP | | | SCAC4 |
| 1613 | RCKG | ROCKINGHAM ENTERPRISES INC | | | SCAC3 |
| 1614 | RCKI | RICKMERS LINE | | | SCAC3 |
| 1615 | RCKI | RICKMERS-LINIE (AMERICA) | | | SCAC4 |
| 1616 | RCKJ | ROCKY WELLS TRUCKING INC | | | SCAC4 |
| 1617 | RCKK | RCKP ENTERPRISES LLC | | | SCAC4 |
| 1618 | RCKL | RICKLAR INC | | | SCAC3 |
| 1619 | RCKL | RCK LOGISTIC TRANSPORTE INTERNACION | | | SCAC4 |
| 1620 | RCKM | ROCKMAN TRUCKING | | | SCAC4 |
| 1621 | RCKN | ROCKTON TRANSPORT | | | SCAC3 |
| 1622 | RCKO | R C K TRUCKING INC | | | SCAC3 |
| 1623 | RCKR | ROCKY MOUNTAIN RELOAD | | | SCAC3 |
| 1624 | RCKS | ROCK TRANSFER & STORAGE, INC | | | SCAC3 |
| 1625 | RCKS | ROCK TRANSFER & STORAGE INC | | | SCAC4 |
| 1626 | RCKT | ROCKET TRANSPORT, INC | | | SCAC3 |
| 1627 | RCKT | RICKERT TRUCKING INC | | | SCAC4 |
| 1628 | RCKV | ROCK VALLEY CONTRACT CARRIERS INC | | | SCAC3 |
| 1629 | RCKX | Refiners Car Co. | 1/1941-1/1946 | | NAKINA |
| 1630 | RCKX | Refiners Car Corp. | 7/1930-4/1938 | | NAKINA |
| 1631 | RCKX | Refiners Car Corp. | Apr-38 | | NRHS |
| 1632 | RCKX | REFINERS CAR CORP. | | | PWRC |
| 1633 | RCL | Thales Avionic Limited | Name changed from Racal Avionics | GB | AVCODES |
| 1634 | RCL | Racal Avionics | Name changed to Thales Avionic Limited | GB | AVCODES |
| 1635 | RCL | Real Aeroclub de Valencia | | E | AVCODES |
| 1636 | RCL | Railcare Logistik Ab | | SE | VKM |
| 1637 | RCLA | RCL TRUCKING LLC | | | SCAC4 |
| 1638 | RCLC | RITCHIE, L CARTAGE LIMITED | | | SCAC4 |
| 1639 | RCLD | RCL TRANSPORT LTD | | | SCAC4 |
| 1640 | RCLE | RED CIRCLE EXPRESS INC | | | SCAC3 |
| 1641 | RCLE | RIEDEL, CLAUDE | | | SCAC4 |
| 1642 | RCLF | ROYAL CROWN LOGISTICS LTD | | | SCAC4 |
| 1643 | RCLG | R C LEASING INC | | | SCAC3 |
| 1644 | RCLH | RACER CARTAGE & LOGISTICS | | | SCAC4 |
| 1645 | RCLI | ROSER & COWEN LOGISTICAL CUSTOMS SV | | | SCAC4 |
| 1646 | RCLJ | ROYAL COACH LINES OF NEW JERSEY INC | | | SCAC3 |
| 1647 | RCLL | REGENCY COACH LINES LTD | | | SCAC3 |
| 1648 | RCLN | ROYAL COACH LINES | | | SCAC3 |
| 1649 | RCLN | RICHARDS, CHARLES & SONS LTD | | | SCAC4 |
| 1650 | RCLO | ROCK CREEK LOGISTICS LLC | | | SCAC4 |
| 1651 | RCLP | RIVER, CHARLES LABORATORIES PRE CLI | | | SCAC4 |
| 1652 | RCLQ | ROCKHILL LOGGING INC | | | SCAC4 |
| 1653 | RCLR | RICE, LARRY TRUCKING | | | SCAC3 |
| 1654 | RCLS | ROCK LEASING INC | | | SCAC3 |
| 1655 | RCLS | RIVER CITY LANDSCAPE SUPPLY INC | | | SCAC4 |
| 1656 | RCLT | R C L TRUCK LINE INC | | | SCAC3 |
| 1657 | RCLT | RACE LOGISTICS LLC | | | SCAC4 |
| 1658 | RCLU | R.M.I. CHEMICAL LOGISTICS BV | | NL | BIC |
| 1659 | RCLU | RCL AGENCIES, INC. | | | SCAC3 |
| 1660 | RCLU | R M I TRANSPORT & | | | SCAC4 |
| 1661 | RCLX | Macquarie Rail Inc. | added 7/2007 | | NAKINA |
| 1662 | RCLX | Railcar Custom Leasing LLC | added 10/2003; 7/2005; eliminated 7/2007 | | NAKINA |
| 1663 | RCLX | *RAILCAR CUSTOM LEASING LLC | | | PWRC |
| 1664 | RCLX | +MACQUARIE RAIL, INC. | | | PWRC |
| 1665 | RCLX | RAILCAR CUSTOM LEASING LLC | | | SCAC4 |
| 1666 | RCLZ | (CSXT)RETIRED 04-06-93 ATP (ACI 2340) | | | PWRC |
| 1667 | RCM | Aircam Aviation Ltd. | Callsign: Aircam, | GB | AVCODES |
| 1668 | RCM | Air Cannes Mediterranee | Callsign: Cannes Azur, | F | AVCODES |
| 1669 | RCMA | ROAD CRUISE MULTI PORTER INC | | | SCAC4 |
| 1670 | RCMC | RICHMOND TRUCKING | | | SCAC3 |
| 1671 | RCMC | R C MAC | | | SCAC4 |
| 1672 | RCME | RIVER CITY MOVERS LLC | | | SCAC4 |
| 1673 | RCMH | RC MOBILE HOME TRANSPORTING | | | SCAC3 |
| 1674 | RCMI | RC MOTOR TRANSPORT INC | | | SCAC3 |
| 1675 | RCMI | RC MOTOR TRANSPORT INC | | | SCAC4 |
| 1676 | RCMJ | ROBIL, M J TRUCKING COMPANY | | | SCAC4 |
| 1677 | RCMK | RCM TRUCKING INC | | | SCAC3 |
| 1678 | RCMK | ROCKY MOUNTAIN RECYCLING | | | SCAC4 |
| 1679 | RCML | R C MOTOR LINES INC | | | PWRC |
| 1680 | RCMM | ROCKY MOUNTAIN MOBILE HOME TRANSPOR | | | SCAC3 |
| 1681 | RCMM | R C M MODULAIRE INC | | | SCAC4 |
| 1682 | RCMN | ROCHA, MANUEL L & SONS | | | SCAC3 |
| 1683 | RCMO | R C MOTORS INC | | | SCAC3 |
| 1684 | RCMR | R C M R TRANSPORT INC | | | SCAC4 |
| 1685 | RCMS | ROCKY MOUNTAIN SHUTTLINES INC | | | SCAC3 |
| 1686 | RCMS | R & C MOTORSPORTS | | | SCAC4 |
| 1687 | RCMV | RI-CO MOVING | | | SCAC3 |
| 1688 | RCMX | Services Unlimited | added 1/1994; eliminated 4/2000; 7/2000-7/2005 (not listed) | | NAKINA |
| 1689 | RCMX | Railroad Car Management Co., Inc. | added 4/1985; eliminated 1/1994 | | NAKINA |
| 1690 | RCMX | Ringgold Coal Mining Co. | added 10/1975; eliminated 10/1977; 1/1980 | | NAKINA |
| 1691 | RCMX | Red ""C"" Oil Manufacturing Co. | 8/1920-7/1923 | | NAKINA |
| 1692 | RCMX | Ringgold Coal Mining Co. | Jan-80 | | NRHS |
| 1693 | RCMX | Railroad Car Management Co., Inc. | added 4/85; eliminated 1/94 | | NRHS |
| 1694 | RCMX | Services Unlimited | added 1/94; eliminated 4/2000; 7/2000 | | NRHS |
| 1695 | RCMX | *RED "C" OIL MANUFACVTURING CO. | | | PWRC |
| 1696 | RCMX | *RINGGOLD COAL MINING CO. | | | PWRC |
| 1697 | RCMX | +SERVICES UNLIMITED [RAILROAD CAR MANAGEMENT CO.] | | | PWRC |
| 1698 | RCMX | Services Unlimited | | | RSRV |
| 1699 | RCMX | SERVICES UNLIMITED | | | SCAC4 |
| 1700 | RCMZ | RAWHIDE COAL MINE | | | PWRC |
