| 6401 | ROKX | +CAROLINA POWER & LIGHT CO. d/b/a PROGRESS ENERGY, INC. | PWRC | ||
| 6402 | ROKX | CAROLINS POWER & LIGHT D/B/A PROGRE | SCAC4 | ||
| 6403 | ROKY | ROCKY MOUNTAIN SUPPLY INC | SCAC4 | ||
| 6404 | ROL | Aeroel Airways | ICAO1 | ||
| 6405 | ROLA | ROWLAND DRAYAGE CORPORATION | SCAC3 | ||
| 6406 | ROLB | ROLLET BROS LOGISTICS | SCAC4 | ||
| 6407 | ROLD | ROULAND TRUCKING SERVICE | SCAC3 | ||
| 6408 | ROLD | ROLLET BROS TRUCKING CO INC | SCAC4 | ||
| 6409 | ROLF | ROLFE RACING INC | SCAC4 | ||
| 6410 | ROLI | ROLLING STONE CARTAGE INC | SCAC3 | ||
| 6411 | ROLI | ROLLING STONE CARTAGE INC | SCAC4 | ||
| 6412 | ROLJ | ROLLMAN, J & SON, INC | SCAC3 | ||
| 6413 | ROLJ | ROLLMAN, J AND SON INC | SCAC4 | ||
| 6414 | ROLK | ROLCO TRAILERS INC | SCAC4 | ||
| 6415 | ROLL | ROLL-OFFS TRUCKING INC | SCAC4 | ||
| 6416 | ROLM | ROLLINS MOVING AND STORAGE, INC | SCAC3 | ||
| 6417 | ROLM | ROLLINS MOVING AND STORAGE, INC | SCAC4 | ||
| 6418 | ROLMA | Rolmafer | CH | VKM | |
| 6419 | ROLN | ROLAND TRUCKING COMPANY | SCAC3 | ||
| 6420 | ROLO | R O L I SYSTEMS INC | SCAC3 | ||
| 6421 | ROLO | RO-LOU TRANSPORT LTEE | SCAC4 | ||
| 6422 | ROLP | ROLAND LEASING CORP | SCAC3 | ||
| 6423 | ROLP | ROLAND LEASING CORP | SCAC4 | ||
| 6424 | ROLQ | ROLLINS TERMINALS INC | SCAC3 | ||
| 6425 | ROLS | ROSEN LIVESTOCK | SCAC3 | ||
| 6426 | ROLU | RO-LO PACIFIC LINE | PWRC | ||
| 6427 | ROLU | Ro-Lo Pacific Line | RSRV | ||
| 6428 | ROLU | RO-LO PACIFIC LINE | SCAC3 | ||
| 6429 | ROLU | ROLLTAINER | SCAC4 | ||
| 6430 | ROLV | ROUSSLANG TRANSFER | SCAC3 | ||
| 6431 | ROLX | Empire Railcar Corp. | 7/2005 (not listed) | NAKINA | |
| 6432 | ROLX | Robson Leather Co., Ltd. | added 7/1960; 4/1961-4/1970; eliminated 7/1970 | NAKINA | |
| 6433 | ROLX | Royal Manufacturing Co. of Duquesne | 1/1945-4/1947 | NAKINA | |
| 6434 | ROLX | Robson Leather Co., Ltd. | added 7/60; 4/61-4/70; eliminated 7/70 | NRHS | |
| 6435 | ROLX | *ROYAL MANUFACTURING CO. OF DUQUESNE | PWRC | ||
| 6436 | ROLX | *ROBSON LEATHER CO., LTD. | PWRC | ||
| 6437 | ROLX | +EMPIRE RAILCAR CORP. | PWRC | ||
| 6438 | ROLX | ROBSON LEATHER CO LTD | SCAC3 | ||
| 6439 | ROLX | EMPIRE RAILCAR CORPORATION | SCAC4 | ||
| 6440 | ROLY | ROLLEY MOVING & STORAGE INC | SCAC3 | ||
| 6441 | ROLY | ROLYS TRUCKING INC | SCAC4 | ||
| 6442 | ROM | Aeromar | IATA: BQ | ICAO1 | |
| 6443 | ROMAG | RAAN - SUCURSALA ROMAG TERMO | RO | VKM | |
| 6444 | ROMB | ROBERTS MOTOR SERVICE CO | SCAC3 | ||
| 6445 | ROMDS | M&D SEA FARERS SRL | RO | VKM | |
| 6446 | ROMG | ROME'N SONS CARTAGE, INC | SCAC3 | ||
| 6447 | ROMG | ROMERO GONZALEZ, ANGEL | SCAC4 | ||
| 6448 | ROMI | RO-MAC | SCAC3 | ||
| 6449 | ROML | ROBERTS MOTOR LINES, INC | SCAC3 | ||
| 6450 | ROMN | ROMANS MOTOR FREIGHT, INC | SCAC3 | ||
| 6451 | ROMN | ROMANS MOTOR FREIGHT INC | SCAC4 | ||
| 6452 | ROMO | RODS PARCEL DELIVERY | SCAC3 | ||
| 6453 | ROMPK | ROMPAK S.R.L. | RO | VKM | |
| 6454 | ROMQ | ROME-ALBANY EXPRESS INC | SCAC3 | ||
| 6455 | ROMQ | ROSELAND MANAGEMENT CO | SCAC4 | ||
| 6456 | ROMR | ROAM TRANSPORT INC | SCAC4 | ||
| 6457 | ROMT | ROBBINS MOTOR TRANSPORTATION INC | SCAC3 | ||
| 6458 | ROMW | ROMAR TERMINAL AND WAREHOUSE CO INC | SCAC3 | ||
| 6459 | ROMX | Roy O. Martin Lumber Co., Inc. | added 10/1968; 4/1970; eliminated 1/1971 | NAKINA | |
| 6460 | ROMX | Roy O. Martin Lumber Co., Inc. | added 10/68; 4/70; eliminated 1/71 | NRHS | |
| 6461 | ROMX | ROY O. MARTIN LUMBER CO., INC. | PWRC | ||
| 6462 | ROMY | ROOMSTORE INC | SCAC4 | ||
| 6463 | RON | Nauru Air Corporation | IATA: ON | ICAO1 | |
| 6464 | RON | Our Airline | IATA: ON | ICAO1 | |
| 6465 | RONA | RONTRA FREIGHT INC | SCAC4 | ||
| 6466 | RONE | ROUNTREE TRUCKING COMPANY | SCAC3 | ||
| 6467 | RONE | ROSENAU EQUIPMENT COMPANY INC | SCAC4 | ||
| 6468 | RONE | Rail One S.p.A. | IT | VKM | |
| 6469 | RONF | ROANE TRANSFER | SCAC3 | ||
| 6470 | RONI | ROMANELLI & SON INC | SCAC4 | ||
| 6471 | RONJ | ROGERS TRANSFER, INC | SCAC3 | ||
| 6472 | RONK | RONNIES TRUCKING INC | SCAC4 | ||
| 6473 | RONL | ROTRANSCO | SCAC3 | ||
| 6474 | RONM | RONNOCO 1 INC | SCAC4 | ||
| 6475 | RONN | RONE TRUCKING INC | SCAC3 | ||
| 6476 | RONN | RONE TRUCKING INC | SCAC4 | ||
| 6477 | RONO | RONS TOWING | SCAC3 | ||
| 6478 | RONP | RONS PRODUCE INC | SCAC3 | ||
| 6479 | RONP | ROLL ON TRANSPORTATION INC | SCAC4 | ||
| 6480 | RONQ | RONEY DELIVERY SERVICE | SCAC3 | ||
| 6481 | RONR | RONS TRANSPORT | SCAC3 | ||
| 6482 | RONS | ROBERTS & SINGER | SCAC3 | ||
| 6483 | RONS | ROBERTS & SINGER | SCAC4 | ||
| 6484 | RONT | RONALDS TRAILER TRANSPORT | SCAC3 | ||
| 6485 | RONU | RDON, INC. | SCAC3 | ||
| 6486 | RONU | NAHSHOL TALLYING AND SUPERVISION | SCAC4 | ||
| 6487 | RONW | ROWELL & WATSON CO INC | SCAC3 | ||
| 6488 | RONX | MACQUARIE RAIL INC | SCAC4 | ||
| 6489 | ROO | Aeroitalia | ICAO1 | ||
| 6490 | ROOC | ROCO OIL COMPANY INC | SCAC3 | ||
| 6491 | ROOC | ROCO OIL COMPANY INC | SCAC4 | ||
| 6492 | ROOG | ROCCO-S TRUCKING INC | SCAC4 | ||
| 6493 | ROOH | ROSE TRANSPORT INC | SCAC3 | ||
| 6494 | ROOH | ROSE TRANSPORT INC | SCAC4 | ||
| 6495 | ROOL | ROGER, R T OIL CO INC | SCAC4 | ||
| 6496 | ROOM | ROLL ON TRANSPORTATION COMPANY | SCAC4 | ||
| 6497 | ROON | ROOSEN TRUCKING | SCAC4 | ||
| 6498 | ROOR | ROORDA TRANSPORT CO | SCAC3 | ||
| 6499 | ROOS | ROOSTER EXPRESS INC | SCAC3 | ||
| 6500 | ROOS | ROOSTER CRUISER LLC | SCAC4 |