| 1 | RED | Comite International de La Croix-Rouge Red Cross (International Committee) | Callsign: Red Cross, Designator RX recalled by IATA. Non-airline Org. in airline industry | CH | AVCODES |
| 2 | RED | Comite International de La Croix-Rouge Red Cross (International Committee) | IATA: RX, Callsign: Red Cross, Designator RX recalled by IATA. Non-airline Org. in airline industry | CH | AVCODES |
| 3 | RED | International Committee of the Red Cross | | | ICAO1 |
| 4 | REDA | RED LINE TRANSPORTATION INC | | | SCAC4 |
| 5 | REDA | Lafarge Aggregates Limited | | UK | VKM |
| 6 | REDAP | Red Apple Transit | | USA | TRAFFIC |
| 7 | REDB | RED BALL EXPRESS | | | SCAC3 |
| 8 | REDC | REDWING CARRIERS, INC | | | SCAC3 |
| 9 | REDC | RED CARPET CONTAINER LINE | | | SCAC4 |
| 10 | REDD | REDDING DESPATCH | | | SCAC3 |
| 11 | REDE | REDE TRUCKING | | | SCAC3 |
| 12 | REDF | RED EAGLE SERVICES | | | SCAC3 |
| 13 | REDG | RED TRUCKING | | | SCAC3 |
| 14 | REDG | RED EAGLE EXPRESS | | | SCAC4 |
| 15 | REDG | Red Route Buses, Gravesend | | GB | TRAFFIC |
| 16 | REDH | REDHAGE TRUCK LINES INC | | | SCAC3 |
| 17 | REDH | RED HOT DELIVERIES | | | SCAC4 |
| 18 | REDI | R E D S | | | SCAC3 |
| 19 | REDJ | RED LETTER TRUCKING CO | | | SCAC3 |
| 20 | REDK | REDDICK AUTO EXPRESS INC | | | SCAC3 |
| 21 | REDK | RED K TRANSPORT INC | | | SCAC4 |
| 22 | REDL | RED LINE INC | | | SCAC3 |
| 23 | REDL | Red Line (Brickwood) | | GB | TRAFFIC |
| 24 | REDLINE | Redline Buses | | GB | TRAFFIC |
| 25 | REDM | REDMAN VAN AND STORAGE CO | | | SCAC3 |
| 26 | REDN | RED CARPET LIMOUSINE SERVICE | | | SCAC3 |
| 27 | REDN | RED TRANSPORTADORA NACIONAL DE CARG | | | SCAC4 |
| 28 | REDO | RED LINE TRANSPORT | | | SCAC3 |
| 29 | REDP | REDDING LUMBER TRANSPORT, INC | | | SCAC3 |
| 30 | REDP | REDDING LUMBER TRANSPORT INC | | | SCAC4 |
| 31 | REDQ | REDSHAW TRUCK SERVICE | | | SCAC3 |
| 32 | REDQ | REDTECH INC | | | SCAC4 |
| 33 | REDR | Red Rose of Aylesbury | | GB | TRAFFIC |
| 34 | REDROSE | Red Rose Transit Authority | | USA | TRAFFIC |
| 35 | REDROV | Red Rover | | GB | TRAFFIC |
| 36 | REDT | REDFORD TRUCK LINE | | | SCAC4 |
| 37 | REDTAN | Red & Tan | | USA | TRAFFIC |
| 38 | REDU | SITEBOX STORAGE | | USA | BIC |
| 39 | REDU | Sitebox Storage | | | RSRV |
| 40 | REDV | RED RIVER TRANSPORTATION | | | SCAC4 |
| 41 | REDW | REDWOOD EMPIRE TRANSPORTATION CO IN | | | SCAC3 |
| 42 | REDW | REDWOOD EMPIRE TRANSPORTATION CO IN | | | SCAC4 |
| 43 | REDX | Miron/U.S.A. Ltd. | added 1/1986; eliminated 7/1991; 1/1994-7/2005 (not listed) | | NAKINA |
| 44 | REDX | Miron/U.S.A. Ltd. | added 1/86; eliminated 7/91; 1/94-7/2000 | | NRHS |
| 45 | REDX | MIRON/USA LTD. | | | PWRC |
| 46 | REDX | Saudi Research and Development Corporation (REDEC) | | | RSRV |
| 47 | REDY | REDDY TRUCKING CO | | | SCAC3 |
| 48 | REDZ | *REDMOND INDUSTRY | | | PWRC |
| 49 | REDZ | *REDON, INC. | | | PWRC |
| 50 | REDZ | REDON Inc. | | | RSRV |
| 51 | REDZ | TRANSPORT INTERNATIONAL POOL INC | | | SCAC4 |
