| 1 | AG | Air Contractors (Ireland) Limited | ICAO: ABR, Callsign: Contract, IATA Prefix: 912, Designator AG recalled by IATA. Company transfered from United Kingdom | IRL | AVCODES |
| 2 | AG | Air Ghana Limited | ICAO: GHN, Callsign: Air Ghana, IATA Prefix: 458, Designator AG* recalled by IATA | GH | AVCODES |
| 3 | AG | Air Contractors (UK) Limited | ICAO: ABR, Callsign: Contract, IATA Prefix: 912, Company transfered to Ireland. Name changed from Hunting Air Cargo Airlines Ltd. | GB | AVCODES |
| 4 | AG | Hunting Air Cargo Airlines Ltd. | ICAO: ABR, Callsign: Contract, Name changed to Air Contractors (UK) Limited | GB | AVCODES |
| 5 | AG | Air Trans Africa | Callsign: Transaf, Name change to Affretair | RNY | AVCODES |
| 6 | AG | Aeronaves Del Centro | ICAO: AGA, Designator AG recalled by IATA | YV | AVCODES |
| 7 | AG | Affretair (Private) Limited | ICAO: AFM, Callsign: Afro, Designator AG recalled by IATA | ZW | AVCODES |
| 8 | AG | Arubaanse Luchtvaart Maatschappij N.V dba Aruba Airlines | ICAO: ARU, Callsign: Aruba, IATA Prefix: 209, IATA Accounting and Prefix codes recalled. IATA Prefix code reinstated. | ARU | AVCODES |
| 9 | AG | Agni Air Pvt. Ltd. | Founded in 2006. Ceased operations in November 2012. | NEP | AVCODES |
| 10 | AG | Arubaanse Luchtvaart Maatschappij N.V dba Aruba Airlines | ICAO: ARU, Callsign: Aruba, IATA Prefix: 209, IATA Accounting and Prefix codes recalled. | ARU | AVCODES |
| 11 | AG | Galveston R.R., L.P. | added 7/1998; 7/2000-7/2005 | | NAKINA |
| 12 | AG | The Bay Line R.R., L.L.C. | added 4/1998; eliminated 7/1998 | | NAKINA |
| 13 | AG | Galveston R.R., L.P. | added 7/1997; eliminated 4/1998 | | NAKINA |
| 14 | AG | The Bay Line R.R., L.L.C. | added 1/1997; eliminated 7/1997 | | NAKINA |
| 15 | AG | A&G R.R., L.L.C. | eliminated 1/1997 | | NAKINA |
| 16 | AG | Galveston R.R., L.P. | added 4/1994 | | NAKINA |
| 17 | AG | Abbeville-Grimes Ry. Co., Inc. | added 7/1989; 1/1994; eliminated 4/1994 | | NAKINA |
| 18 | AG | Abbeville-Grimes Ry. Co., Inc. | added 7/89; 1/94; eliminated 4/94 | | NRHS |
| 19 | AG | Galveston R.R., L.P. | added 4/94 | | NRHS |
| 20 | AG | A&G R.R., L.L.C. | eliminated 1/97 | | NRHS |
| 21 | AG | The Bay Line R.R., L.L.C. | added 1/97; eliminated 7/97 | | NRHS |
| 22 | AG | Galveston R.R., L.P. | added 7/97; eliminated 4/98 | | NRHS |
| 23 | AG | The Bay Line R.R., L.L.C. | added 4/98; eliminated 7/98 | | NRHS |
| 24 | AG | Galveston R.R., L.P. | added 7/98; 7/2000 | | NRHS |
| 25 | AG | GALVESTON RAILROAD, LP [ABBYVILLE-GRIMES RWY.; A & G RAILROAD, LLC; THE BAY LINE RAILROAD, LLC] | | | PWRC |
| 26 | AG | Abbeville-Grimes Railway (Bay Line Railroad) | | | RSRV |
| 27 | AG | ABBEVILLE-GRIMES RAILWAY CO INC | | | SCAC4 |
| 28 | AG | Abbeville-Grimes Ry. Co., Inc. | | USA | TRAFFIC |
| 29 | AGA | New Georgia Ltd | Callsign: Agair, Name changed to AG Air Ltd | GE | AVCODES |
| 30 | AGA | Aeronaves Del Centro | IATA: AG, Designator AG recalled by IATA | YV | AVCODES |
| 31 | AGA | AG Air Ltd | Callsign: Geoline, AOC suspended by Georgian CAA on 13 January 2014. Name changed from New Georgia Ltd | GE | AVCODES |
| 32 | AGA | Aeronaves Del Centro | | | ICAO1 |
| 33 | AGA | AGA Gas AB | | SE | VKM |
| 34 | AGAA | AMERICAN GOLD SEAFOODS | | | SCAC4 |
| 35 | AGAB | ARGONAUT AB | | | SCAC3 |
| 36 | AGAB | ARGONAUT AB | | | SCAC4 |
| 37 | AGAE | ARGENTS EXPRESS GROUP | | | SCAC4 |
| 38 | AGAF | ANDRETTI AUTOSPORT HOLDING COMPANY | | | SCAC4 |
| 39 | AGAI | AGATE TRANSPORT INC | | | SCAC3 |
| 40 | AGAL | AGA LOGISICS INC | | | SCAC4 |
| 41 | AGAN | AAG TRANSPORTATION SERVICES INC | | | SCAC4 |
| 42 | AGAO | AERO LOGISTICS | | | SCAC4 |
| 43 | AGAP | ANGAD TRANSPORT | | | SCAC4 |
| 44 | AGAQ | AUGUSTA TRANSFER AND STORAGE | | | SCAC3 |
| 45 | AGAQ | AG SOURCE INC | | | SCAC4 |
| 46 | AGAR | AGAR, J L | | | SCAC3 |
| 47 | AGAR | ANDGAR CORPORATION | | | SCAC4 |
| 48 | AGAS | AGRA TRANSPORT SERVICE INC | | | SCAC3 |
| 49 | AGAS | AL'S GAS COMPANY | | | SCAC4 |
| 50 | AGAU | LINDE GAS BENELUX | | NL | BIC |
| 51 | AGAU | AGA GAS B.V. | | | SCAC3 |
| 52 | AGAU | HOEKLOOS BV | | | SCAC4 |
| 53 | AGAX | Anchor Gasoline Corp. | added 4/1954; 7/1954-10/1966; eliminated 1/1967 | | NAKINA |
| 54 | AGAX | Anchor Gasoline Corp. | added 4/54; 10/57-10/66; eliminated 1/67 | | NRHS |
| 55 | AGAX | ANCHOR GASOLINE CORP. | | | PWRC |
| 56 | AGAX | ANCHOR GASOLINE CORP | | | SCAC3 |
| 57 | AGB | Air Service Gabon | IATA: G8, Ceased operations on 03 August 2010. | G | AVCODES |
| 58 | AGB | Air Service Gabon | IATA: G8 | | ICAO1 |
| 59 | AGBB | AGBEST | | | SCAC4 |
| 60 | AGBC | AGGRESSIVE TRANSPORT LTD | | | SCAC3 |
| 61 | AGBC | AGGRESSIVE TRANSPORT LTD | | | SCAC4 |
| 62 | AGBD | AIR GROUND LOGISTICS | | | SCAC4 |
| 63 | AGBE | AMERICAN HARDWOOD INDUSTRIES LLC | | | SCAC4 |
| 64 | AGBF | ALLIANCE GROUP LOGISTICS LLC | | | SCAC4 |
| 65 | AGBI | AGROCENTRE BELCAN | | | SCAC4 |
| 66 | AGBL | AMERICAN GLOBAL SHIPPING | | | SCAC4 |
| 67 | AGBM | A S L GLOBAL LOGISTICS | | | SCAC4 |
| 68 | AGBN | AGN BULK TRANSPORT INC | | | SCAC4 |
| 69 | AGBS | A G B S COURIER SERVICE | | | SCAC3 |
| 70 | AGBS | ANGEL BLUE SHIPPING INC | | | SCAC4 |
| 71 | AGBU | ARCHEAN CHEMICAL INDUSTRIES LIMITED | | IND | BIC |
| 72 | AGBV | ATL GLOBAL LLC | | | SCAC4 |
| 73 | AGBW | AGRICOLA BAJA BEST S DE RL DE CV | | | SCAC4 |
| 74 | AGBX | A.G. Bartlett Co. | added 4/1962; eliminated 10/1963; 7/1965-10/1966; eliminated 10/1967 | | NAKINA |
| 75 | AGBX | A.G. Bartlett Co. | added 4/62; 7/65-10/66; eliminated 10/67 | | NRHS |
| 76 | AGBX | A. G. BARTLETT CO. | | | PWRC |
| 77 | AGBX | BARTLETT CO A G | | | SCAC3 |
| 78 | AGBY | AMCAT GLOBAL INCORPORATED | | | SCAC4 |
| 79 | AGC | Arab Agricultural Aviation Company | Callsign: Agrico, | ET | AVCODES |
| 80 | AGC | Strategic Airlines Pty Ltd. | IATA: VC, Callsign: Strategic, Name changed to Air Australia Airways | AUS | AVCODES |
| 81 | AGC | Strategic Airlines Pty Ltd. t/a Air Australia Airways | IATA: VC, Callsign: Strategic, Commenced operations on 15 November 2011. Ceased opeations on 17 February 2012. Name changed from Strategic Airlines Pty Ltd w.e.f. 15 November 2011. | AUS | AVCODES |
| 82 | AGC | Arab Agricultural Aviation Company | | | ICAO1 |
| 83 | AGC | AMERICAN GREETING CO. | | | PWRC |
| 84 | AGC | AGC Flat Glass Czech a.s., člen AGC Group | | CZ | VKM |
| 85 | AGCA | AGRICOLA LAS MONTANAS S DE RL DE C | | | SCAC4 |
| 86 | AGCB | ALPHA GROUP CORP | | | SCAC4 |
| 87 | AGCC | ANGLO CANADIAN SHIPPING COMPANY | | | SCAC3 |
| 88 | AGCC | AGC TRUCKING LTD | | | SCAC4 |
| 89 | AGCD | AGRICULTURAL COMMODITIES TRANSPORT | | | SCAC3 |
| 90 | AGCE | AGRICULTURAL CARRIERS, INC | | | SCAC3 |
| 91 | AGCE | ACI MOTOR FREIGHT INC | | | SCAC4 |
| 92 | AGCF | AG CO-OP SERVICES INC | | | SCAC4 |
| 93 | AGCG | AGGREGATE CARTAGE | | | SCAC3 |
| 94 | AGCH | A & G COACH INC | | | SCAC3 |
| 95 | AGCI | AG CARRIERS INC | | | SCAC3 |
| 96 | AGCI | ANGELICA ENTERPRISES INC | | | SCAC4 |
| 97 | AGCJ | AGENTES ADUANALES DE SONORA S DE RL | | | SCAC4 |
| 98 | AGCK | AG LINK INCORPORATED | | | SCAC4 |
| 99 | AGCL | ANCHOR CARTAGE LLC | | | SCAC4 |
| 100 | AGCM | AGRICULTURAL CHEMICALS DEVELOPMENT | | | SCAC3 |
