| 1 | AH | Air Algerie | ICAO: DAH, Callsign: Air Algerie, IATA Prefix: 124, | DZ | AVCODES |
| 2 | AH | Airhub Airlines Limited | ICAO: GJM, Callsign: Airhub, IATA Prefix: 521, IATA Designator changed to RE. | M | AVCODES |
| 3 | AH | ALASKA HYDRO TRAIN | | | PWRC |
| 4 | AH | Atlas Baumachinen GmbH & Co | | DE | VKM |
| 5 | AHA | Air Alpha Greenland A/S | IATA: GD, Callsign: Air Alpha, Designator GD recalled by IATA | GRO | AVCODES |
| 6 | AHA | Air Alpha A/S | Callsign: Air Alpha, Name changed from Air Alpha Greenland A/S | GRO | AVCODES |
| 7 | AHA | Air Alpha Greenland | IATA: GD | | ICAO1 |
| 8 | AHAE | ALTENDORF HARVESTING | | | SCAC4 |
| 9 | AHAG | ARCHANGEL AIR CARGO INC | | | SCAC4 |
| 10 | AHAH | AMC HAULING | | | SCAC4 |
| 11 | AHAI | AHA INC | | | SCAC3 |
| 12 | AHAI | AH TRANSFERS & CARTAGE INC | | | SCAC4 |
| 13 | AHAK | ALOHA TRUCKING | | | SCAC4 |
| 14 | AHAO | ALTAMAHA OIL | | | SCAC4 |
| 15 | AHAP | ALPHA EXPLOSIVES | | | SCAC4 |
| 16 | AHAR | ARROCHAR FUEL CORPORATION | | | SCAC4 |
| 17 | AHAS | A & H TRUCKING & SHIPPING | | | SCAC4 |
| 18 | AHAW | ASC HAULING | | | SCAC4 |
| 19 | AHB | Aerolineas de Honduras, S.A. (AEHSA) | | HN | AVCODES |
| 20 | AHB | Air Alboran S.L. | Callsign: Alhambra, Ceased operations | E | AVCODES |
| 21 | AHB | Aalborg - Hvalpsund Jernbane (Hvalpsundbanen) | 1910 - 1969 | DK | jernbanen.dk |
| 22 | AHB | Aalborg - Hvalpsund Jernbane (Hvalpsundbanen) | 1910 - 1969 | DK | TRAFFIC |
| 23 | AHBC | APOLLO HEALTH AND BEAUTY CARE | | | SCAC4 |
| 24 | AHBS | AHBM SYSTEMS INC | | | SCAC4 |
| 25 | AHBX | Brown Chemical Co., Inc. | added 4/1975; eliminated 7/1978 | | NAKINA |
| 26 | AHBX | Brown Chemical Co., Inc. | added 4/75; eliminated 7/78 | | NRHS |
| 27 | AHBX | BROWN CHEMICAL CO. | | | PWRC |
| 28 | AHBZ | ANHEUSER BUSCH | | | PWRC |
| 29 | AHC | Cargo Airline of the State Concern Azerbaijan Hava | Callsign: Azalviacargo, Name changed from Azalaviacargo | AZ | AVCODES |
| 30 | AHC | Azalaviacargo | Callsign: Azalaviacargo, Name changed to Cargo Airline of the State Concern Azerbaijan Hava | AZ | AVCODES |
| 31 | AHC | Air Hawaii | Callsign: Air Hawaii, | USA | AVCODES |
| 32 | AHC | Azal Avia Cargo | | | ICAO1 |
| 33 | AHCA | ALBRIGHT, C A & SONS LLC | | | SCAC4 |
| 34 | AHCE | ATLANTIC HEATING CO INC | | | SCAC4 |
| 35 | AHCF | AAA HOMETOWN CLIFTON RELIABLE MOVIN | | | SCAC3 |
| 36 | AHCF | ABRASH ENTERPRISES INC | | | SCAC4 |
| 37 | AHCG | A & H CARTAGE CO | | | SCAC3 |
| 38 | AHCG | A AND H CARTAGE INC | | | SCAC4 |
| 39 | AHCH | ACTION CHARTER COACHES | | | SCAC3 |
| 40 | AHCI | ALLISON SHIPPING INTERNATIONAL INC | | | SCAC4 |
| 41 | AHCJ | AHRENS, CJ TRUCKING | | | SCAC4 |
| 42 | AHCL | ARTEMISSION SHIPPING CO LTD | | | SCAC3 |
| 43 | AHCO | ANCHOR HOCKING CORP | | | SCAC3 |
| 44 | AHCQ | ALSTOM HYDRO CANADA INC | | | SCAC4 |
| 45 | AHCR | AMERADA HESS CORP & SUBSIDIARIES | | | SCAC3 |
| 46 | AHCS | ARROWHEAD COURIER SYSTEM INC | | | SCAC3 |
| 47 | AHCT | ALOHA CARGO TRANSPORT (DIV OF NORTH | | | SCAC4 |
| 48 | AHCV | AR HAULING CORP | | | SCAC4 |
| 49 | AHCW | ALLECTO HOLDING CORPORATION | | | SCAC4 |
| 50 | AHCX | The PCS Phosphate Co. | added 7/2006 | | NAKINA |
| 51 | AHCX | Arcadian Corp. | added 10/1984; 1/1985-7/2005; eliminated 7/2006 | | NAKINA |
| 52 | AHCX | Ansbacher-Hagerstown Chemical Corp. | 7/1937 (not listed); 4/1938 | | NAKINA |
| 53 | AHCX | Ansbacher-Hagerstown Chemical Corp. | Apr-38 | | NRHS |
| 54 | AHCX | Arcadian Corp. | added 10/84; 1/94-7/2000 | | NRHS |
| 55 | AHCX | *ANSBACHER-HAGERSTOWN CHEMICAL CORP. | | | PWRC |
| 56 | AHCX | +THE PCS PHOSPHATE CO. [ARCADIAN CORPORATION] | | | PWRC |
| 57 | AHCX | Arcadian Corporation | | | RSRV |
| 58 | AHCX | PCS PHOSPHATE COMPANY INC | | | SCAC4 |
| 59 | AHD | Czech Air Handling | Callsign: Airhandling, | CZ | AVCODES |
| 60 | AHD | Air Holland | IATA: HD, Callsign: Air Holland, Founded in 1984. Commenced operations in 1985. Suspended all operations in December 1991. ICAO callsign changed to Orange | NL | AVCODES |
| 61 | AHD | Air Holland | IATA: HD, Callsign: Orange, Founded in 1984. Commenced operations in 1985. Suspended all operations in December 1991. ICAO callsign changed from Air Holland | NL | AVCODES |
| 62 | AHD | Czech Air Handling | | | ICAO1 |
| 63 | AHD | Rail system s.r.o | | CZ | VKM |
| 64 | AHDC | ALMACEN HIDRAULICO DEL NORTE S A D | | | SCAC4 |
| 65 | AHDI | AMERICAN HIGH DESERT INDUSTRIES INC | | | SCAC3 |
| 66 | AHDN | ASH, DAN TRUCKING INC | | | SCAC4 |
| 67 | AHDS | AUSTON, H D & SON MOVING & STORAGE | | | SCAC3 |
| 68 | AHDT | ANCHOR D RANCH SIMMENTALS | | | SCAC4 |
| 69 | AHE | Airport Helicopter Basel, Muller & Co. | Callsign: Airport Helicopter, Name changed to Airport Helicopter Basel AHB AG. | CH | AVCODES |
| 70 | AHE | Airport Helicopter Basel AHB AG | Callsign: Airport Helicopter, Name changed from Airport Helicopter Basel, Muller & Co. | CH | AVCODES |
| 71 | AHE | Airport Helicopter Basel, Muller & Co. | | | ICAO1 |
| 72 | AHEA | ASSOCIATED HEAT INC | | | SCAC4 |
| 73 | AHEB | ALL HOURS ENERGY | | | SCAC4 |
| 74 | AHED | AMERICAN STEP AHEAD EXPRESS INC | | | SCAC4 |
| 75 | AHEF | AMERICAN HIGHWAY EXPRESS INC | | | SCAC4 |
| 76 | AHEG | ALEXANDERS, H ENT INC | | | SCAC4 |
| 77 | AHEH | AMERICAN HEAVY EQUIPMENT & HAULING | | | SCAC3 |
| 78 | AHEI | ANGELS HALO EXPRESS INC | | | SCAC4 |
| 79 | AHEJ | A & H EXPRESS INC | | | SCAC4 |
| 80 | AHEK | AHE TRUCKING LLC | | | SCAC4 |
| 81 | AHEM | APACHE MOVING & STORAGE COMPANY | | | SCAC3 |
| 82 | AHEM | APACHE MOVING & STORAGE CO INC | | | SCAC4 |
| 83 | AHEN | AHENAKEW, EDWARD L | | | SCAC3 |
| 84 | AHEN | ALMA SHIPMANAGEMENT SA OF PANAMA | | | SCAC4 |
| 85 | AHEO | APACHE INC | | | SCAC4 |
| 86 | AHEP | ARCE, HECTOR | | | SCAC4 |
| 87 | AHER | ANOTHER CHOICE INC | | | SCAC3 |
| 88 | AHER | AUTOTRANSPORTES HERZIG | | | SCAC4 |
| 89 | AHES | A & H EXPEDITING SERVICE INC | | | SCAC4 |
| 90 | AHET | ALL AMERICAN HOTSHOT LLC | | | SCAC4 |
| 91 | AHEU | AIRLIFE GASES PRIVATE LIMITED | | IND | BIC |
| 92 | AHF | Aspen Helicopters, Inc. | Callsign: Aspen, | USA | AVCODES |
| 93 | AHF | Aspen Helicopters | | | ICAO1 |
| 94 | AHFC | ALPHA FREIGHTLINES LLC | | | SCAC4 |
| 95 | AHFI | ASHLEY FUEL INC | | | SCAC4 |
| 96 | AHFM | AMERICAN HOU-FAST MOVING & STORAGE | | | SCAC3 |
| 97 | AHFM | AHNER, JOHN EXPRESS INC | | | SCAC4 |
| 98 | AHFN | AERNI & HITZEL FUEL INC | | | SCAC4 |
| 99 | AHFP | AMERICAN HOME FURNITURE PLACEMENT I | | | SCAC3 |
| 100 | AHFS | AUNTHILL FARMS | | | SCAC4 |
