| 1 | ARS | Aeronaves Hafe, S.A. de C.V. | Callsign: Hafe, | MEX | AVCODES |
| 2 | ARS | Air Sardinia International | | I | AVCODES |
| 3 | ARS | Jetrider International | Callsign: Jetrider, ICAO designator changed to JRI | GB | AVCODES |
| 4 | ARS | Air Sardinia Ltd. | | GB | AVCODES |
| 5 | ARS | Aeromet Servicios | | | ICAO1 |
| 6 | ARS | Arkansas Southern R.R. | added 4/2008 | | NAKINA |
| 7 | ARS | ARKANSAS SOUTHERN RAILROAD | | | PWRC |
| 8 | ARS | Arkansas Southern Railroad | | | RSRV |
| 9 | ARS | ARKANSAS SOUTHERN RAILROAD | | | SCAC4 |
| 10 | ARS | ARS Altmann AG | | D | TRAFFIC |
| 11 | ARS | ARS Altmann AG | | DE | VKM |
| 12 | ARSB | ARSENBERGER TRUCKING CO | | | SCAC3 |
| 13 | ARSB | ARSENBERGER TRUCKING CO | | | SCAC4 |
| 14 | ARSC | ARTIC STORAGE COMPANY | | | SCAC3 |
| 15 | ARSD | AERO SPEED MAIL SERVICE, INC | | | SCAC3 |
| 16 | ARSD | AIRSPEED INTERNATIONAL CORP | | | SCAC4 |
| 17 | ARSE | ARSENAULT TRUCKING | | | SCAC4 |
| 18 | ARSF | AIRCRAFT SERVICE CO | | | SCAC3 |
| 19 | ARSF | ALLIANCE RELOCATION SERIVCES LLC | | | SCAC4 |
| 20 | ARSG | ARMSTRONG MOVING & STORAGE INC | | | SCAC3 |
| 21 | ARSG | ARMSTRONG MOVING & STORAGE INC | | | SCAC4 |
| 22 | ARSI | ARIES R & T TRUCKING INC | | | SCAC3 |
| 23 | ARSI | ACE RELOCATION SYSTEMS INC OF IL | | | SCAC4 |
| 24 | ARSJ | ARCTIC SPAS | | | SCAC4 |
| 25 | ARSK | ARIAS SONS TRUCKING | | | SCAC4 |
| 26 | ARSLO | Arriva Slovenija | | SLO | TRAFFIC |
| 27 | ARSM | ALLIED RELOCATION SERVICES INC | | | SCAC3 |
| 28 | ARSN | AIR SUNSHINE (AIR CODE YI) | | | SCAC4 |
| 29 | ARSO | ADVANCE RELOCATION & STORAGE SYSTEM | | | SCAC3 |
| 30 | ARSO | ADVANCE RELOCATION & STORAGE SYSTEM | | | SCAC4 |
| 31 | ARSP | AIR-SHIP PACKERS INC | | | SCAC3 |
| 32 | ARSR | ARTESIAN TRANSPORTATION INC | | | SCAC3 |
| 33 | ARSS | AIRO SERVICES INC | | | SCAC3 |
| 34 | ARSS | Arriva Southend-on-Sea | | GB | TRAFFIC |
| 35 | ARSSA | Acciona Rail Services s.a. | | ES | VKM |
| 36 | ARST | ARMS WAY TRANSPORT INC | | | SCAC3 |
| 37 | ARST | ART TRANSPORTATION SERVICES LLC | | | SCAC4 |
| 38 | ARSU | ATC LLC | | RUS | BIC |
| 39 | ARSU | ALPINA REEDEREI AG | | | SCAC3 |
| 40 | ARSW | ALLEGHENY SOUTHERN RWY | | | SCAC3 |
| 41 | ARSX | Sunoco Inc. (R&M) | added 4/2002; 7/2005 | | NAKINA |
| 42 | ARSX | Aristech Chemical Corp. | 1/1994-7/2000; eliminated 4/2002 | | NAKINA |
| 43 | ARSX | Shippers' Car Line Division, ACF Industries Inc. | added 1/1976; 1/1980 | | NAKINA |
| 44 | ARSX | Shippers' Car Line Division of ACF Industries Inc. | added 7/1956; 10/1957-1/1975; eliminated 1/1976 | | NAKINA |
| 45 | ARSX | Shippers' Car Line Corp. | added 10/1955; eliminated 7/1956 | | NAKINA |
| 46 | ARSX | American Radiator & Standard Sanitary Corp. | 1/1941-4/1947 | | NAKINA |
| 47 | ARSX | Shippers' Car Line Corp. | eliminated 7/56 | | NRHS |
| 48 | ARSX | Shippers' Car Line Division of ACF Industries Inc. | added 7/56; 10/57-1/80 | | NRHS |
| 49 | ARSX | Aristech Chemical Corp. | 1/94-7/2000 | | NRHS |
| 50 | ARSX | *AMERICAN RADIATOR & STANDARD SANITARY CORP. | | | PWRC |
| 51 | ARSX | +SUNOCO, iNC. (ARISTECH CHEMICAL CORP.) | | | PWRC |
| 52 | ARSX | *SHIPPERS' CAR LINE DIV. ACF INDUSTRIES, INC. | | | PWRC |
| 53 | ARSX | +SUNOCO, INC. (ARISTECH CHEMICAL CORP.) | | | PWRC |
| 54 | ARSX | Aristech Chemical Corporation (Sunoco) | | | RSRV |
| 55 | ARSX | SUNOCO INC (R & M) | | | SCAC4 |
| 56 | ARSY | ARCHER SERVICES INC | | | SCAC3 |
| 57 | ARSY | ACE RELOCATION SYSTEMS INC OF TX | | | SCAC4 |
