| 6401 | RNCX | NORTH CAROLINA DEPT. OF TRANSPORTATION, RAIL DIV. | | | PWRC |
| 6402 | RNCX | NORTH CAROLINA DEPARTMENT OF TRANSP | | | SCAC4 |
| 6403 | RND | Rutland Aviation Limited | Callsign: Rutland, | GB | AVCODES |
| 6404 | RND | Rutland Aviation | | | ICAO1 |
| 6405 | RNDF | RND TRANSPORT LLC | | | SCAC4 |
| 6406 | RNDI | R & D TRANSPORTATION INC | | | SCAC4 |
| 6407 | RNDJ | R & D TRUCKING | | | SCAC3 |
| 6408 | RNDK | RANDECKER TRUCKING INC | | | SCAC3 |
| 6409 | RNDL | RANDALL'S EXPRESS, INC | | | SCAC3 |
| 6410 | RNDM | RANDALL MOVERS | | | SCAC3 |
| 6411 | RNDO | REX N DON VAN LINES INC | | | SCAC3 |
| 6412 | RNDO | REXDON INC | | | SCAC4 |
| 6413 | RNDP | RANDOLPH TRUCKING INC | | | SCAC3 |
| 6414 | RNDQ | RANDLE'S TRUCKING SERVICE. | | | SCAC3 |
| 6415 | RNDQ | RANDLES TRUCKING SERVICE | | | SCAC4 |
| 6416 | RNDT | R & D TRUCKING | | | SCAC3 |
| 6417 | RNDU | RANDAR LLC | | RUS | BIC |
| 6418 | RNDV | REINDERS TRANSPORTATION SERVICE INC | | | SCAC3 |
| 6419 | RNDX | American Railcar Leasing, Inc. | added 4/2005; 7/2005 | | NAKINA |
| 6420 | RNDX | ACF Industries, Inc. | added 10/2000; eliminated 4/2005 | | NAKINA |
| 6421 | RNDX | ACF Industries, Inc., Amcar Division | 1/1994-7/2000 (not listed) | | NAKINA |
| 6422 | RNDX | ACF Industries, Inc., Amcar Division —temporary expiring 1Jan81 | 1/1980 | | NAKINA |
| 6423 | RNDX | ACF Industries, Inc., Amcar Division —temporary expiring 1Apr75 | 1/1975 | | NAKINA |
| 6424 | RNDX | American Car and Foundry Division, ACF Industries Inc. —temporary expiring 1Apr71 | 4/1970 | | NAKINA |
| 6425 | RNDX | American Car and Foundry Division, ACF Industries Inc. -- temporary expiring 1Apr71 | Apr-70 | | NRHS |
| 6426 | RNDX | ACF Industries, Inc., Amcar Division -- temporary expiring 1Apr75 | Jan-75 | | NRHS |
| 6427 | RNDX | ACF Industries, Inc., Amcar Division -- temporary expiring 1Jan81 | Jan-80 | | NRHS |
| 6428 | RNDX | ACF Industries, Inc., Amcar Division | 1/94-7/2000 | | NRHS |
| 6429 | RNDX | ACF Industries, Inc. | added 10/2000 | | NRHS |
| 6430 | RNDX | AMERICAN RAILCAR LEASING, INC. [ACF INDUSTRIES INC. AMCAR DIV.] | | | PWRC |
| 6431 | RNDX | ACF Industries | | | RSRV |
| 6432 | RNDX | AMERICAN RAILCAR LEASING LLC | | | SCAC4 |
| 6433 | RNE | Air Salone | IATA: 2O, | WAL | AVCODES |
| 6434 | RNE | Air Salone | IATA: 20 | | ICAO1 |
| 6435 | RNE | RNE Rhein-Neckar-Eisenbahservicegesellschaft mbH | | DE | VKM |
| 6436 | RNEC | RENN TRANSPORTATION INC | | | SCAC4 |
| 6437 | RNED | R N E TRUCKING INC | | | SCAC3 |
| 6438 | RNED | ROBINSON EXPRESS DELIVERY | | | SCAC4 |
| 6439 | RNEG | R & E ENTERPRISES OF MANKATO INC | | | SCAC3 |
| 6440 | RNEN | RENE TRANSPORT LTD | | | SCAC4 |
| 6441 | RNEQ | RAINER EQUIPMENT TRANSPORT INC | | | SCAC3 |
| 6442 | RNER | RENNER TRUCKING CO | | | SCAC3 |
| 6443 | RNES | RAINBOW EXPRESS | | | SCAC3 |
| 6444 | RNET | R & E FREIGHT SERVICES INC | | | SCAC3 |
| 6445 | RNEW | RAINIER EXPRESS LTD | | | SCAC3 |
| 6446 | RNEY | RAINEY, BILL | | | SCAC3 |
| 6447 | RNEY | REENEY LOGISTICS INC | | | SCAC4 |
| 6448 | RNFC | RENO FUEL COMPANY INC | | | SCAC4 |
| 6449 | RNFL | RONFLEX CORP | | | SCAC3 |
| 6450 | RNFL | RONLIN FARMS LTD | | | SCAC4 |
| 6451 | RNFN | ROSENOW FARMS TRANSPORTATION LLC | | | SCAC4 |
| 6452 | RNFT | R & F TRUCKING | | | SCAC3 |
| 6453 | RNG | Orange Aircraft Leasing | Callsign: Orange, | NL | AVCODES |
| 6454 | RNG | Renegade Air Limited | Callsign: Renegade, | EAK | AVCODES |
| 6455 | RNG | Ornage Aircraft Leasing | | | ICAO1 |
| 6456 | RNGA | RINGSTAR EXPRESS INC | | | SCAC4 |
| 6457 | RNGB | RANG, BOB | | | SCAC3 |
| 6458 | RNGC | RANGER NAVIGATION CO LTD | | | SCAC3 |
| 6459 | RNGC | RONS AREA RUG | | | SCAC4 |
| 6460 | RNGE | RINGER ENTERPRISES INC | | | SCAC3 |
| 6461 | RNGE | RINGER TRUCKING CO | | | SCAC4 |
| 6462 | RNGG | RONNING TRUCKING | | | SCAC4 |
| 6463 | RNGH | REED & GRAHAM INC | | | SCAC3 |
| 6464 | RNGH | REED & GRAHAM INC | | | SCAC4 |
| 6465 | RNGI | RAN-GAR INC | | | SCAC3 |
| 6466 | RNGI | RANDLE GLOBAL LOGISTICS INC | | | SCAC4 |
| 6467 | RNGM | RANGE, MELVIN W INC | | | SCAC3 |
| 6468 | RNGP | R N G TRANSPORT INC | | | SCAC4 |
| 6469 | RNGQ | RING, DARRELL TRUCKING | | | SCAC3 |
| 6470 | RNGR | RANGER TRANSPORTATION INC | | | SCAC3 |
| 6471 | RNGR | RANGER TRANSPORTATION INC | | | SCAC4 |
| 6472 | RNGS | R & G TRANSIT INC | | | SCAC3 |
| 6473 | RNGT | RONGEL TRUCKING | | | SCAC4 |
| 6474 | RNGX | Rural Natural Gas Co. | 1/1950-4/1961; eliminated 7/1961 | | NAKINA |
| 6475 | RNGX | Rural Natural Gas Co. | 1/52-4/61 | | NRHS |
| 6476 | RNGX | RURAL NATURAL GAS CO. | | | PWRC |
| 6477 | RNHA | R & H TRUCKING INC | | | SCAC3 |
| 6478 | RNHD | REINHARD PETROLEUM LLC | | | SCAC4 |
| 6479 | RNHR | R & H TRUCKING | | | SCAC3 |
| 6480 | RNHT | REINHARDT CORP | | | SCAC4 |
| 6481 | RNI | Rennia Aviation LLC | Callsign: Rennia, | USA | AVCODES |
| 6482 | RNIC | RO NET INC | | | SCAC4 |
| 6483 | RNIE | RAINIER MOVING SYSTEMS INC | | | SCAC3 |
| 6484 | RNIE | RAINIER MOVING SYSTEMS INC | | | SCAC4 |
| 6485 | RNIK | RUSINIAKS TOWING & RECOVERY INC | | | SCAC3 |
| 6486 | RNIN | RAZA NATIONAL INC | | | SCAC4 |
| 6487 | RNIQ | R N INDUSTRIES TRUCKING INC | | | SCAC4 |
| 6488 | RNIS | ROSSEN, NIS PETER TRUCKING | | | SCAC3 |
| 6489 | RNIU | RAINBOW NAVIGATION | | | SCAC3 |
| 6490 | RNJ | Rønne - Nexø Jernbane | 1913 - 1934 | DK | jernbanen.dk |
| 6491 | RNJE | R & J EXPRESS | | | SCAC3 |
| 6492 | RNJE | RANSOM, JERRY | | | SCAC4 |
| 6493 | RNJF | R & J FREIGHT INC | | | SCAC3 |
| 6494 | RNJK | R & J TRUCKING | | | SCAC3 |
| 6495 | RNJN | R & J TRANSPORT INC | | | SCAC3 |
| 6496 | RNJO | RONJO DELIVERY SERVICE INC | | | SCAC3 |
| 6497 | RNJO | ROMO NAJERA, GERARDO | | | SCAC4 |
| 6498 | RNJQ | R N J INCORPORATED | | | SCAC3 |
| 6499 | RNJS | R & J TRANSPORTATION SERVICES | | | SCAC3 |
| 6500 | RNJT | R & J CARTAGE INC | | | SCAC3 |
