| 7301 | ROVO | RONNANS TRANSFER AND STORAGE COMPAN | | | SCAC3 |
| 7302 | ROVS | ROGERS VAN & STORAGE, INC | | | SCAC3 |
| 7303 | ROVT | ROSS TRUCKING | | | SCAC3 |
| 7304 | ROVTR | VEST TRANS RAIL SRL | | RO | VKM |
| 7305 | ROVU | STEINWEG HANDLSVEEM BV | | | SCAC4 |
| 7306 | ROW | Nor Aviation | Callsign: Rotorwing, | N | AVCODES |
| 7307 | ROWA | ROADCAP, WARD, JR, INC | | | SCAC3 |
| 7308 | ROWB | ROWLAND BROS MOVING & STORAGE COMPA | | | SCAC3 |
| 7309 | ROWC | ROBERTSON, WILBUR C | | | SCAC3 |
| 7310 | ROWD | ROW-DOM INC | | | SCAC3 |
| 7311 | ROWF | ROWE, TOM SERVICE | | | SCAC3 |
| 7312 | ROWG | ROWDEN, GERALD | | | SCAC3 |
| 7313 | ROWH | ROBINSON TERMINAL WAREHOUSE CORPORA | | | SCAC3 |
| 7314 | ROWH | ROBINSON TERMINAL WAREHOUSE CORPORA | | | SCAC4 |
| 7315 | ROWI | RIGHT-O-WAY INC (A CALIF CORP) | | | SCAC3 |
| 7316 | ROWI | ROWDY EXPRESS INC | | | SCAC4 |
| 7317 | ROWK | ROWLAND, KING B TRUCKING INC | | | SCAC3 |
| 7318 | ROWL | ROWELL, DON INC | | | SCAC3 |
| 7319 | ROWM | ROYAL OAK WASTE PAPER & METAL CO | | | SCAC4 |
| 7320 | ROWN | ROWLAND TRANSPORTATION INC | | | SCAC4 |
| 7321 | ROWO | ROWE MOVING & STORAGE CO | | | SCAC3 |
| 7322 | ROWP | RPM TRUCKING INC | | | SCAC4 |
| 7323 | ROWQ | ROBBINS WAREHOUSE & DIST CO | | | SCAC3 |
| 7324 | ROWR | ROWE, R W TRUCKING | | | SCAC3 |
| 7325 | ROWS | ROBINSON WRECKER SERVICE | | | SCAC3 |
| 7326 | ROWS | ROWLAND SEEDS INC | | | SCAC4 |
| 7327 | ROWV | RIGHT O WAY DELIVERY INC | | | SCAC3 |
| 7328 | ROWY | RIGHT-O-WAY TRUCKING INC | | | SCAC3 |
| 7329 | ROX | Roblex Aviation, Inc. | IATA: R9, Callsign: Roblex, On January 8, 2011 Roblex Aviation filed Chapter 11 bankruptcy. Ceased operations during July 2013. | USA | AVCODES |
| 7330 | ROX | Roblex Aviation | | | ICAO1 |
| 7331 | ROX | Atlantic Richfield Co. | added 7/1966; 10/1966-4/1970; eliminated 1/1972 | | NAKINA |
| 7332 | ROX | Richfield Oil Corp. | 7/1937-7/1965; eliminated 7/1966 | | NAKINA |
| 7333 | ROX | Richfield Oil Co. of California | 7/1930-7/1935 | | NAKINA |
| 7334 | ROX | Richfield Oil Corporation | 4/38-7/65; eliminated 7/66 | | NRHS |
| 7335 | ROX | Atlantic Richfield Co. | added 7/66; 10/66-4/70; eliminated 1/72 | | NRHS |
| 7336 | ROX | ATLANTIC RICHFIELD CO. [RICHFIELD OIL CORP.] | | | PWRC |
| 7337 | ROXB | ROXBURY TRUCKING CO INC | | | SCAC3 |
| 7338 | ROXC | RIO EXPRESS (MX-374938) | | | SCAC4 |
| 7339 | ROXE | ROAD ONE (1) EXPRESS INC | | | SCAC4 |
| 7340 | ROXM | ROXMAN TRUCKING | | | SCAC4 |
| 7341 | ROXN | R & O TRANSFER | | | SCAC4 |
| 7342 | ROXS | ROCKET EXPRESS INTERNATIONAL | | | SCAC3 |
| 7343 | ROXS | ROCKET EXPRESS COURIER | | | SCAC4 |
| 7344 | ROXT | ROLLIN-ON EXPRESS TRUCKING INC | | | SCAC3 |
| 7345 | ROXT | ROMEX TRANSPORT INC | | | SCAC4 |
| 7346 | ROXU | EMCO MARINE LTD / CONTAINERS DPT. | | IL | BIC |
| 7347 | ROXU | EMCO MARINE LTD / CONTAINERS DPT | | | SCAC4 |
| 7348 | ROXX | Rocky Mountain Recycling, Inc. | added 4/2007; eliminated 7/2007; added 1/2009 | | NAKINA |
| 7349 | ROXX | ROCKY MOUNTIAN RECYCLING, INC. | | | PWRC |
| 7350 | ROXX | ROCKY MOUNTAIN RECYCLING INC | | | SCAC4 |
| 7351 | ROY | Royal Aviation, Inc. | IATA: QN, IATA Prefix: 498, Merged in Canada 3000 | CDN | AVCODES |
| 7352 | ROY | Pacific Royale Airways, PT. | Callsign: Paxroy, ICAO designator changed to PRQ. ICAO callsign changed to Skyrider | RI | AVCODES |
| 7353 | ROY | Roy Ritter Sky Dive | Callsign: Sky Dive, | IL | AVCODES |
| 7354 | ROY | Conifair Aviation | | | ICAO1 |
| 7355 | ROY | STE ROY | | FR | VKM |
| 7356 | ROYC | ROYAL TRAFFIC | | | SCAC4 |
| 7357 | ROYD | ROYAL CREST DISTRIBUTORS INC | | | SCAC3 |
| 7358 | ROYE | ROYAL EXPRESS INC | | | SCAC4 |
| 7359 | ROYF | ROYAL LOGISTICS INC | | | SCAC4 |
| 7360 | ROYG | ROYALE CARTAGE INC | | | SCAC3 |
| 7361 | ROYI | ROYS TRANSFER INC | | | SCAC3 |
| 7362 | ROYI | ROYS TRANSFER INC | | | SCAC4 |
| 7363 | ROYJ | ROYAL ELECTRIC SUPPLY COMPANY | | | SCAC4 |
| 7364 | ROYK | ROY, MARK | | | SCAC4 |
| 7365 | ROYL | ROYAL TRANSPORTATION LIMITED | | | SCAC3 |
| 7366 | ROYL | ROYAL TRANSPORTATION LIMITED | | | SCAC4 |
| 7367 | ROYM | ROYAL MARITIME CORPORATION | | | SCAC4 |
| 7368 | ROYN | ROYAL MESSENGER SERVICE | | | SCAC3 |
| 7369 | ROYN | ROY, MARTIN TRANSPORT | | | SCAC4 |
| 7370 | ROYP | ROYAL TRANSPORT INC | | | SCAC3 |
| 7371 | ROYP | ROYAL TRANSPORT INC | | | SCAC4 |
| 7372 | ROYQ | ROYAL TRUCKING | | | SCAC4 |
| 7373 | ROYR | ROY BROS, INC | | | SCAC3 |
| 7374 | ROYR | ROY BROS INC | | | SCAC4 |
| 7375 | ROYS | ROYS TRANSFER SERVICE | | | SCAC3 |
| 7376 | ROYT | ROYSTER TRUCKING INC | | | SCAC3 |
| 7377 | ROYT | ROYSTER TRUCKING INC | | | SCAC4 |
| 7378 | ROYU | ROYAL NETHERLANDS | | | PWRC |
| 7379 | ROYU | Royal Netherlands | | | RSRV |
| 7380 | ROYU | ROYAL NETHERLANDS STEAMSHIP CO | | | SCAC3 |
| 7381 | ROYX | Chartrand's Tank Car Service, Inc. | eliminated 1/1991 | | NAKINA |
| 7382 | ROYX | TCL, Inc. | added 7/1973; 1/1975-1/1980; eliminated 10/1988 | | NAKINA |
| 7383 | ROYX | Chartrand's Tank Car Service, Inc. | eliminated 1/91 | | NRHS |
| 7384 | ROYX | TCL, Inc. | added 7/73; 1/75-1/80; eliminated 10/88 | | NRHS |
| 7385 | ROYX | *TCL INC. | | | PWRC |
| 7386 | ROYX | *CHARTRAND'S TANK CAR SERVICE, INC. | | | PWRC |
| 7387 | ROYX | TCL | | | RSRV |
| 7388 | ROYY | ROYAL TRANSPORT LTD | | | SCAC4 |
| 7389 | ROZB | ROZELLE, BENJAMIN F | | | SCAC3 |
| 7390 | ROZI | ROZIERS OIL COMPANY | | | SCAC4 |
| 7391 | ROZK | ROZAK TRUCKING | | | SCAC3 |
| 7392 | ROZL | RIO AZUL COMPANIA ARMADORA S A | | | SCAC3 |
| 7393 | ROZL | RODRIGUEZ ZAVALA, JOSE | | | SCAC4 |
| 7394 | ROZN | ROZON, MICHEL TRANSPORT | | | SCAC4 |
| 7395 | ROZO | ROYAL MOTOR LINES INC | | | SCAC3 |
| 7396 | ROZO | RODRIGUEZ ZAMBRANO, MACARENA DEL RO | | | SCAC4 |
| 7397 | RP | Chautauqua Airlines, Inc. d/b/a USAir Express | ICAO: CHQ, Callsign: Chautauqua, IATA Prefix: 363, IATA designator changed from US*. Founded in 1973. Merged into Shuttle America (S5/TCF) on 31 December 2014. | USA | AVCODES |
| 7398 | RP | M. robert Petrelluzzi, Antilles Air Service | Callsign: Petrel, | F | AVCODES |
| 7399 | RP | Budapest Aircraft Service Ltd. | ICAO: BPS, Callsign: Base, | H | AVCODES |
| 7400 | RP | Rompetrol Logistics | | RO | TRAFFIC |
