| 6901 | ROF | Aero France International SA | IATA: FB, Callsign: Airof, | F | AVCODES |
| 6902 | ROF | AeroFrance | | F | AVCODES |
| 6903 | ROF | Romanian Air Force | | | ICAO1 |
| 6904 | ROFC | ROBERTSON FACTORIES INC | | | SCAC3 |
| 6905 | ROFC | ROUTE TEN TRANSPORT INC | | | SCAC4 |
| 6906 | ROFE | ROADSTAR LLC | | | SCAC4 |
| 6907 | ROFH | R ONE FOUR NINE ZERO (1490) HOLDING | | | SCAC4 |
| 6908 | ROFJ | RODRIGUEZ, DAGOBERTO | | | SCAC4 |
| 6909 | ROFK | ROTHFORK TRUCKING | | | SCAC3 |
| 6910 | ROFL | ROCKET FREIGHT LINES | | | PWRC |
| 6911 | ROFL | RETIF OIL & FUEL CO | | | SCAC3 |
| 6912 | ROFL | RETIF OIL & FUEL CO | | | SCAC4 |
| 6913 | ROFM | ROACH OF MADISON INC | | | SCAC3 |
| 6914 | ROFP | R O STEPP TRUCKING LLC | | | SCAC4 |
| 6915 | ROFS | ROCKFORD FREIGHT SERVICE | | | SCAC3 |
| 6916 | ROFSR | FSR RAILSERVICE SRL | | RO | VKM |
| 6917 | ROFT | ROOFERS TRANSIT | | | SCAC3 |
| 6918 | ROFT | RULE ONE FOUR (14) TRANSPORT INC | | | SCAC4 |
| 6919 | ROFW | ROBINSONS FAIRWIND TRANSPORT LTD | | | SCAC3 |
| 6920 | ROG | Sergio Gonzales Rogel, C.C., Ing. Fernado G. Rogel | Callsign: Rogel, | MEX | AVCODES |
| 6921 | ROG | Fundacion Rego | Callsign: Rego, | E | AVCODES |
| 6922 | ROG | FundaciA~^(3) Rego | | | ICAO1 |
| 6923 | ROG | Rail Operations Group | | GB | TRAFFIC |
| 6924 | ROG | Saarstahl AG (ROGESA) | | DE | VKM |
| 6925 | ROGA | ROGERS TRANSFER & STORAGE COMPANY | | | SCAC3 |
| 6926 | ROGA | ROOF BOLT EXPRESS INC | | | SCAC4 |
| 6927 | ROGB | ROGERS OIL COMPANY OF COLUMBIA INC | | | SCAC4 |
| 6928 | ROGC | ROGERS CHEVROLET CO | | | SCAC3 |
| 6929 | ROGD | ROGNESS, GLEN D TRUCKING | | | SCAC3 |
| 6930 | ROGD | RGO | | | SCAC4 |
| 6931 | ROGE | ROBLEE, GEORGE | | | SCAC4 |
| 6932 | ROGF | ROGUE SPECIALTY TRANSPORT | | | SCAC4 |
| 6933 | ROGG | ROMINGER, GEORGE TRUCKING | | | SCAC3 |
| 6934 | ROGI | ROGERS TRUCKING INC | | | SCAC3 |
| 6935 | ROGJ | RUD OIL & GAS | | | SCAC4 |
| 6936 | ROGL | ROGELIO TRUCKS | | | SCAC4 |
| 6937 | ROGM | RIO GRANDE TRANSPORTS INC | | | SCAC3 |
| 6938 | ROGN | ROGERS, J L TRUCKING | | | SCAC3 |
| 6939 | ROGO | ROGELIOS TRUCKING | | | SCAC3 |
| 6940 | ROGO | ROGELIOS TRUCKING | | | SCAC4 |
| 6941 | ROGQ | ROGER TRUCKING CO | | | SCAC3 |
| 6942 | ROGQ | ROMYLIA E N E | | | SCAC4 |
| 6943 | ROGR | ROGERS CARTAGE CO | | | SCAC3 |
| 6944 | ROGR | ROGERS CARTAGE CO | | | SCAC4 |
| 6945 | ROGU | RO CARGO, C.A. | | | SCAC3 |
| 6946 | ROGW | ROGERS TRANSFER COMPANY | | | SCAC3 |
| 6947 | ROH | Aero Gen, S.A. de C.V. | Callsign: Aerogen, | MEX | AVCODES |
| 6948 | ROH | Aero Gen | | | ICAO1 |
| 6949 | ROHA | ROCHA TRUCKING INCORPORATED | | | SCAC4 |
| 6950 | ROHB | ROTH BROTHERS CONTRACTORS INC | | | SCAC3 |
| 6951 | ROHC | RONALD HAULING COMPANY | | | SCAC3 |
| 6952 | ROHC | ROAD HOUSE CARRIERS INC | | | SCAC4 |
| 6953 | ROHDE | Rohde Verkehrsbetriebe GmbH | Real: RVB | D | TRAFFIC |
| 6954 | ROHF | ROYAL HAWAIIAN FORWARDING | | | SCAC3 |
| 6955 | ROHG | ROSE, H G MOVING & STORAGE, FLUSHIN | | | SCAC3 |
| 6956 | ROHG | RONCO OILFIELD HAULING LTD | | | SCAC4 |
| 6957 | ROHH | ROACH, HAROLD H INC | | | SCAC3 |
| 6958 | ROHJ | Ringkøbing - Ørnhøj - Holstebro Jernbane (Ørnhøjbanen) | 1925 - 1961 | DK | TRAFFIC |
| 6959 | ROHK | ROCHESTER TRUCKING INC | | | SCAC4 |
| 6960 | ROHM | ROHMER TRUCKING COMPANY | | | SCAC4 |
| 6961 | ROHN | R O H L TRANSPORT | | | SCAC3 |
| 6962 | ROHP | ROGERS, PHILLIP F | | | SCAC3 |
| 6963 | ROHP | ROHAM EXPRESS | | | SCAC4 |
| 6964 | ROHQ | ROHN, JAMES C | | | SCAC3 |
| 6965 | ROHR | ROHRBAUGH, RODNEY TRUCKING INC | | | SCAC4 |
| 6966 | ROHS | ROTH & SONS TRUCKING INC | | | SCAC3 |
| 6967 | ROHT | ROHMAN TRUCK | | | SCAC3 |
| 6968 | ROHT | RAHNS OIL & PROPANE INC | | | SCAC4 |
| 6969 | ROHV | ROCHESTER VAN & STORAGE | | | SCAC3 |
| 6970 | ROHW | ROHTSTEIN CORP | | | SCAC3 |
| 6971 | ROHW | Friedrich Rohwedder GmbH | | DE | VKM |
| 6972 | ROI | Aviones de Oriente, C.A. (AVIOR) | IATA: 3B, Callsign: Avior, Designator 3B reinstated by IATA | YV | AVCODES |
| 6973 | ROI | Aviones de Oriente, C.A. (AVIOR) | IATA: 9V, Callsign: Avior, IATA Prefix: 742, Designator 3B recalled by IATA | YV | AVCODES |
| 6974 | ROI | Avior Airlines | | | ICAO1 |
| 6975 | ROIF | ROI RECREATION OUTFITTERS INC | | | SCAC4 |
| 6976 | ROIH | RAMSEY OIL | | | SCAC4 |
| 6977 | ROII | RADO INTERNATIONAL INC | | | SCAC4 |
| 6978 | ROIL | RADIANT OIL C | | | SCAC3 |
| 6979 | ROIN | ROSENS INC | | | SCAC3 |
| 6980 | ROIN | ROSENS INC | | | SCAC4 |
| 6981 | ROIO | REBEL OIL CO INC | | | SCAC4 |
| 6982 | ROIP | ROCHESTER INDEPENDENT PACKER, INC | | | SCAC3 |
| 6983 | ROIQ | ROGERS, A G INC | | | SCAC3 |
| 6984 | ROIR | ROAD ISLAND RED | | | SCAC3 |
| 6985 | ROIR | ROMAN IRIBE, OSCAR | | | SCAC4 |
| 6986 | ROIT | ROBBINS TRANSPORT INC | | | SCAC3 |
| 6987 | ROIX | Shintech Inc. | added 10/1974; 1/1975-7/2000; eliminated 4/2001; 7/2005 (not listed) | | NAKINA |
| 6988 | ROIX | Shintech Inc. | added 10/74; 1/75-7/2000; eliminated 4/2001 | | NRHS |
| 6989 | ROIX | SHINTECH INC | | | PWRC |
| 6990 | ROIX | Shintech | | | RSRV |
| 6991 | ROIX | SHINTECH INC | | | SCAC4 |
| 6992 | ROJ | Royal Jet | Callsign: Royaljet, | UAE | AVCODES |
| 6993 | ROJ | Royal Jet | | | ICAO1 |
| 6994 | ROJE | RONAN, J E TRUCKING | | | SCAC3 |
| 6995 | ROJF | REDS OF JAFFREY LLC | | | SCAC4 |
| 6996 | ROJH | ROSE, J H TRUCK LINE CO | | | SCAC3 |
| 6997 | ROJI | ROESNER, JIM GENERAL TRUCKING INC | | | SCAC3 |
| 6998 | ROJI | ROBERTS, ORVAL TRUCKING LTD | | | SCAC4 |
| 6999 | ROJJ | ROUNTREE, JOHN BYRUM JR | | | SCAC3 |
| 7000 | ROJM | ROMAN OIL COMPANY | | | SCAC4 |
