| 1 | ART | Aerotal Aerolineas Territoriales de Colombia Ltda | Callsign: Aerotal, Founded in 1970. Ceased operations during 1983. | CO | AVCODES |
| 2 | ART | Smartlynx Airlines, SIA | IATA: 6Y, Callsign: Smart Lynx, ICAO Designator changed from LTC. ICAO callsign changed from Latcharter. Name changed from Latcharter | LV | AVCODES |
| 3 | ART | Aerotal Aerolineas Territoriales de Colombia Ltda | | | ICAO1 |
| 4 | ART | American Refrigerator Transit Co. | 7/1935-1/1975; eliminated 1/1976; 1/1980-7/2005 | | NAKINA |
| 5 | ART | American Refrigerator Transit Co. | 4/38-7/2000 | | NRHS |
| 6 | ART | AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 7 | ART | American Refrigerator Transit | | | RSRV |
| 8 | ART | American Refrigerator Transit Company | The American Refrigerator Transit Company (ART) was a St. Louis, Missouri-based private refrigerator car line established in 1881 by the Missouri Pacific and Wabash railroads. It is now a subsidiary of the Union Pacific Corporation. | USA | TRAFFIC |
| 9 | ARTA | ARTS SERVICE INC | | | SCAC3 |
| 10 | ARTB | ARROW TRANSPORTATION | | | SCAC3 |
| 11 | ARTC | ARLEDGE TRANSFER INC | | | SCAC3 |
| 12 | ARTD | A | | | SCAC4 |
| 13 | ARTF | ARROW TRANSFER | | | SCAC3 |
| 14 | ARTH | ARTS MOBILEHOMES TRANSPORT INC | | | SCAC3 |
| 15 | ARTH | ARTHUR, W G INC | | | SCAC4 |
| 16 | ARTI | ARROW TRANSPORTATION CO INC | | | SCAC3 |
| 17 | ARTI | ARTES IMPORTS INC | | | SCAC4 |
| 18 | ARTK | ARTUS TRUCKING CO | | | SCAC3 |
| 19 | ARTL | ARCHBOLD TRUCK LINE, INC | | | SCAC3 |
| 20 | ARTL | ARNONE TRANSPORT LIMITED | | | SCAC4 |
| 21 | ARTM | ARTIM TRANSPORT INC | | | SCAC3 |
| 22 | ARTM | ARMSTRONG RELOCATION MONTGOMERY LLC | | | SCAC4 |
| 23 | ARTN | AURORA TRUCKING INC | | | SCAC3 |
| 24 | ARTO | ARTERIAL TRANSPORT CORPORATION | | | SCAC3 |
| 25 | ARTO | ARTERIAL TRANSPORT CORPORATION | | | SCAC4 |
| 26 | ARTOG | Arriva Tog | 2003 - | DK | TRAFFIC |
| 27 | ARTP | ARNETT TRUCKING | | | SCAC3 |
| 28 | ARTP | ARNDT, PAUL | | | SCAC4 |
| 29 | ARTQ | ART STORAGE & TRANSFER CO | | | SCAC3 |
| 30 | ARTR | AMERITRANS INC | | | SCAC3 |
| 31 | ARTS | ACE REFRIGERATED TRUCKING SERVICE | | | SCAC3 |
| 32 | ARTS | Anglia Railways Train Services Ltd. | Real: AR, 1999: 614km standard gauge, electrified at 25kV 50Hz Anglia Railways was a British train operating company, owned by GB Railways, which between 5 January 1997 and 31 March 2004 operated mainline trains out of London Liverpool Street station and a number of local rail services in East Anglia. On April 1, 2004 its franchise was transferred to Train Operating Company London Eastern Railway Ltd, which is a subsidiary of the National Express Group. Its services are branded 'one'. | GB | TRAFFIC |
| 33 | ARTT | AMERICA-RUSSIA-TURKEY OCEAN NAVIGAT | | | SCAC3 |
| 34 | ARTT | AMERICA-RUSSIA-TURKEY OCEAN NAVIGAT | | | SCAC4 |
| 35 | ARTU | CARU CONTAINERS BV | | NL | BIC |
| 36 | ARTU | CATU CONTAINERS S.A. | | | PWRC |
| 37 | ARTU | CARU Containers | | | RSRV |
| 38 | ARTU | CATU CONTAINERS S.A. | | | SCAC3 |
| 39 | ARTU | CONTAINER ASSOCIATION ROTTERDAM BV | | | SCAC4 |
| 40 | ARTV | ARROW TRANSFER AND STORAGE COMPANY | | | SCAC3 |
| 41 | ARTW | ARROW TOWING SERVICE | | | SCAC3 |
| 42 | ARTX | American Refrigerator Transit Co. | 7/1932-4/1947 | | NAKINA |
| 43 | ARTX | American Refrigerator Transit Co. | Apr-38 | | NRHS |
| 44 | ARTX | *AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 45 | ARTX | *ARTRAIN | | | PWRC |
| 46 | ARTY | ARTS TRANSFER & STORAGE CO | | | SCAC3 |
