| 1 | AGS | Air Gambia | Callsign: Atas, | WAG | AVCODES |
| 2 | AGS | Air Go Airlines S.A. | IATA: 4A, Callsign: Airgo Cargo, IATA Prefix: 454, Commenced operations in September 2008. Ceased operations in October 2011. | GR | AVCODES |
| 3 | AGS | AOT Ground Aviation Services Co., Ltd. | Callsign: Blue Port, | T | AVCODES |
| 4 | AGS | Alabama Great Southern R.R. Co. | 1/1975-7/2005 | | NAKINA |
| 5 | AGS | Alabama Great Southern R.R. Co. | 1/75-7/2000 | | NRHS |
| 6 | AGS | ALABAMA GREAT SOUTHERN RR | | | PWRC |
| 7 | AGS | Alabama Great Southern Railroad | | | RSRV |
| 8 | AGSB | ACCELERATED LOGISTICS INC | | | SCAC4 |
| 9 | AGSD | ATLANTIC & GULF STEVEDORES OF ALABA | | | SCAC3 |
| 10 | AGSG | ANGLIA SHIPPING COMPANY LIMITED | | | SCAC3 |
| 11 | AGSH | ANGLOMAR SHIPPING COMPANY LIMITED | | | SCAC3 |
| 12 | AGSI | ARGONAUT SHIPPING CORPORATION | | | SCAC3 |
| 13 | AGSI | ABS GLOBAL SERVICES INC | | | SCAC4 |
| 14 | AGSJ | AGS WORLD TRANSPORT LP | | | SCAC4 |
| 15 | AGSK | ALL GIRLS TRANSPORTATION & LOGISTIC | | | SCAC4 |
| 16 | AGSL | ALDER GULCH SHORT LINE RWY. | | | PWRC |
| 17 | AGSL | ALLSTATES GOLD SERVICES LTD | | | SCAC3 |
| 18 | AGSM | AGS GOLD COAST INC | | | SCAC3 |
| 19 | AGSM | AG SHIELD MFG | | | SCAC4 |
| 20 | AGSN | AGRELLA & SON | | | SCAC3 |
| 21 | AGSO | AGWAY SYSTEMS INCORPORATED | | | SCAC3 |
| 22 | AGSO | AGWAY SYSTEMS INCORPORATED | | | SCAC4 |
| 23 | AGSP | AG SUPPLY INC | | | SCAC3 |
| 24 | AGSP | AGS TRANSPORT INC | | | SCAC4 |
| 25 | AGSQ | AGASSIZ TRAILERS | | | SCAC4 |
| 26 | AGSR | AG RESOURCES | | | SCAC4 |
| 27 | AGSS | AGS SOUTHERN STAR INC | | | SCAC3 |
| 28 | AGSS | A G ENTERPRISES | | | SCAC4 |
| 29 | AGST | AUGUST TRANSPORT INC | | | SCAC4 |
| 30 | AGSU | LINDE GAS AB | | GB | BIC |
| 31 | AGSU | ARTHUR GUINNESS & SON CO., LTD | | | SCAC3 |
| 32 | AGSU | AGA GAS AB | | | SCAC4 |
| 33 | AGSV | ASHLAND GAS SERVICE INC | | | SCAC3 |
| 34 | AGSX | Alabama-Georgia Syrup Co. | 1/1952; eliminated 10/1953 | | NAKINA |
| 35 | AGSX | Alabama-Georgia Syrup Co. | 1/52; eliminated 10/53 | | NRHS |
| 36 | AGSX | ALABAMA-GEORGIA SYRUP CO. | | | PWRC |
| 37 | AGSY | AGS EURASIA LINE | | | SCAC4 |
