| 1 | AB | Air Berlin GmbH & Co. Luftverkehrs KG | ICAO: BER, Callsign: Air Berlin, Ceased operations on 27 October 2017. Formerly Air Berlin, Inc. t/a Air Berlin USA. | D | AVCODES |
| 2 | AB | Superior Aviation, Inc. | ICAO: HKA, Callsign: Spend Air, IATA designator changed to SO | USA | AVCODES |
| 3 | AB | Air Cortez International | | USA | AVCODES |
| 4 | AB | Manila Aviation Services, Inc. | Callsign: Manila Aviation, | RP | AVCODES |
| 5 | AB | Air Berlin, Inc. t/a Air Berlin USA | ICAO: BER, Callsign: Air Berlin, Founded in 1978. Restructured as a germany compnay Air Berlin GmbH & Co. Luftverkehrs KG. | USA | AVCODES |
| 6 | AB | KAP.kg Aircompany LLC | ICAO: KGS, Callsign: Berkut, | KS | AVCODES |
| 7 | AB | Bonza Aviation Pty Ltd. | ICAO: BNZ, Callsign: Bonza, | AUS | AVCODES |
| 8 | AB | Amagerbanen | 1907 - 1974 | DK | jernbanen.dk |
| 9 | AB | Akron Barberton Cluster Ry. Co. | added 10/1994; 7/2000-7/2005 | | NAKINA |
| 10 | AB | Akron Barberton Cluster Ry. Co. | added 10/94; 7/2000 | | NRHS |
| 11 | AB | Angeln Bahn GmbH | Flensburg | D | privat-bahn.de |
| 12 | AB | AKRON BARBERTON CLUSTER RAILWAY COMPANY | | | PWRC |
| 13 | AB | Akron Barberton Cluster Railway | | | RSRV |
| 14 | AB | AKRON BARBERTON CLUSTER RAILWAY COM | | | SCAC4 |
| 15 | AB | Appenzeller Bahnen | | CH | TRAFFIC |
| 16 | AB | Appenzeller Bahnen | | CH | VKM |
| 17 | ABA | Artem-Avia | Callsign: Arten-Avia, | UA | AVCODES |
| 18 | ABA | Abacus Air | IATA: VM, Callsign: Abacus, | D | AVCODES |
| 19 | ABA | Aero-Beta GmbH & Co. KG. | Callsign: Aerobeta, | D | AVCODES |
| 20 | ABA | Artem-Avia | | | ICAO1 |
| 21 | ABA | Amtsbanerne på Als | 1898 - 1933 | DK | jernbanen.dk |
| 22 | ABA | Amtsbanerne på Als | 1898 - 1933 | DK | TRAFFIC |
| 23 | ABAA | ALBANY AUTO AUCTION INC | | | SCAC3 |
| 24 | ABAB | ALBA SOLE TOURISM INC | | | SCAC3 |
| 25 | ABAC | A B A TRUCKING CORPORATION | | | SCAC3 |
| 26 | ABAE | AMBASSADOR EXPRESS SERVICES | | | SCAC3 |
| 27 | ABAF | ABC AIR FREIGHT INC | | | SCAC3 |
| 28 | ABAG | A BAGGAGE & TRANSFER | | | SCAC3 |
| 29 | ABAI | A B B A DISTRIBUTION SERVICES INC | | | SCAC3 |
| 30 | ABAJ | A B A S TRANSPORTATION INC | | | SCAC3 |
| 31 | ABAL | ALABAMA CARRIERS INC | | | SCAC3 |
| 32 | ABAM | ALABAMA AMERICAN TOURS | | | SCAC3 |
| 33 | ABAO | ALBURY AND COMPANY | | | SCAC3 |
| 34 | ABAO | ACE OF BAITS INC | | | SCAC4 |
| 35 | ABAP | A & B ASSEMBLY & PACKAGING CO INC | | | SCAC3 |
| 36 | ABAP | ABATE TRANSPORTATION LLC | | | SCAC4 |
| 37 | ABAQ | ABLE AIR FREIGHT INC | | | SCAC3 |
| 38 | ABAU | ABAC TRANSPORT LTD. | | | SCAC3 |
| 39 | ABAV | ABCO AMERICAN VAN LINES | | | SCAC3 |
| 40 | ABAV | AB Aviation | | COM | TRAFFIC |
| 41 | ABAY | ALL BAY CITIES TRUCKING INC | | | SCAC3 |
| 42 | ABB | Air Belgium International | IATA: AJ, Callsign: Air Belgium, Sold to Airtours and operations ceased by end October 2000. IATA designator changed from VY | B | AVCODES |
| 43 | ABB | African Business and Transportations | Callsign: African Business, | ZRE | AVCODES |
| 44 | ABB | Air Belgium International | IATA: VY, Callsign: Air Belgium, IATA designator changed to AJ. Name chaneged from Abelag Airways | B | AVCODES |
| 45 | ABB | Air Belgium SA | IATA: KF, Callsign: Air Belgium, | B | AVCODES |
| 46 | ABB | African Business and Transportations | | | ICAO1 |
| 47 | ABB | Akron & Barberton Belt R.R. Co. | 1/1975-1/1994; eliminated 4/1995; 7/2000-7/2005 | | NAKINA |
| 48 | ABB | Akron & Barberton Belt R.R. Co. | 1/75-1/94; eliminated 4/95; 7/2000 | | NRHS |
| 49 | ABB | AKRON & BARBERTON BELT RAILROAD | | | PWRC |
| 50 | ABB | Akron and Barberton Belt Railroad | | | RSRV |
| 51 | ABB | ABB AB | | SE | VKM |
| 52 | ABBA | ABBAS TRUCKING | | | SCAC3 |
| 53 | ABBA | ABBA HOLDINGS LTD | | | SCAC4 |
| 54 | ABBB | ABBOTT BUS LINES INC | | | SCAC3 |
| 55 | ABBB | ABBOTT BUS LINES INC | | | SCAC4 |
| 56 | ABBC | ABBOTT CONSTRUCTION COMPANY | | | SCAC3 |
| 57 | ABBC | ABBEYS SPECIALIZED HAULERS LLC | | | SCAC4 |
| 58 | ABBD | ABBEY FORWARDING | | | SCAC3 |
| 59 | ABBE | APB SERVICES | | | SCAC4 |
| 60 | ABBF | A BEST BUY PREMIUM FUEL & TRUCKING | | | SCAC4 |
| 61 | ABBG | A & B TRUCKING INCORPORATED | | | SCAC3 |
| 62 | ABBK | ABBOT TRUCKING | | | SCAC3 |
| 63 | ABBM | ATLANTIC BOAT TRANSPORTATION INC | | | SCAC4 |
| 64 | ABBN | ABEL TRANSPORTATION | | | SCAC3 |
| 65 | ABBP | ABBOTT, PAUL TRUCKING | | | SCAC3 |
| 66 | ABBQ | ABBOT & CO | | | SCAC3 |
| 67 | ABBS | ABBS MOVING SERVICE INC | | | SCAC3 |
| 68 | ABBT | ABBOTT OIL COMPANY INC | | | SCAC4 |
| 69 | ABBU | ATLANTIC BULK CARRIERS MANAGMENT LTD | | USA | BIC |
| 70 | ABBU | Atlantic Bulk Carriers Managment | | | RSRV |
| 71 | ABBU | ATLANTIC BULK CARRIERS LTD | | | SCAC3 |
| 72 | ABBU | ATLANTIC BULK CARRIERS LTD | | | SCAC4 |
| 73 | ABBV | ABBA INTERNATIONAL, INC | | | SCAC3 |
| 74 | ABBW | ABBCO | | | SCAC3 |
| 75 | ABBX | Abbott Labs | added 1/1982; 1/1985; eliminated 4/1993; 1/1994-7/2005 (not listed) | | NAKINA |
| 76 | ABBX | Abbott Labs | added 1/82; eliminated 4/93; 1/94-7/2000 | | NRHS |
| 77 | ABBX | ABBOTT LABS | | | PWRC |
| 78 | ABBX | Abbott Labs | | | RSRV |
| 79 | ABBX | ABBOTT LABS | | | SCAC4 |
| 80 | ABBY | A & B BUS COMPANY INC | | | SCAC3 |
| 81 | ABBY | ABBY GAS SERVICE | | | SCAC4 |
| 82 | ABC | OAG Worldwide | IATA: CR, Name changed to UBM Aviation - OAG. Non-airline Org. in airline industry | GB | AVCODES |
| 83 | ABC | ATLANTA, BIRMINGHAM AND COAST RAILROAD | | | PWRC |
| 84 | ABCA | ABC MOVING & STORAGE | | | SCAC3 |
| 85 | ABCA | AMERICAN BEST CARE TRANSPORTATION L | | | SCAC4 |
| 86 | ABCAR | AB Prijevoz d.o.o. | | HR | VKM |
| 87 | ABCB | ABC BONDED WAREHOUSES | | | SCAC3 |
| 88 | ABCE | ABC FREIGHT INC | | | SCAC3 |
| 89 | ABCF | ABC DISCOUNT AUTO TRANSPORT INC | | | SCAC3 |
| 90 | ABCF | ABC/FRY-WAGNER INC | | | SCAC4 |
| 91 | ABCH | A B C MOVING AND STORAGE INC | | | SCAC3 |
| 92 | ABCH | A B C MOVING AND STORAGE INC | | | SCAC4 |
| 93 | ABCI | ABC MOVING & STORAGE | | | SCAC3 |
| 94 | ABCI | ATLANTIC BULK CARRIERS MANAGEMENT L | | | SCAC4 |
| 95 | ABCK | Alaska British Columbia Transportation Co. | 1/1980-1/1994 | | NAKINA |
| 96 | ABCK | Alaska British Columbia Transportation Co. | 1/80-1/94 | | NRHS |
| 97 | ABCK | RETIRED 01-26-94 (017) ATP [ALASKA BRITISH COLUMBIA TRANSPORTATION] | | | PWRC |
| 98 | ABCK | Alaska British Columbia Transportation | | | RSRV |
| 99 | ABCL | ATLANTIC BULK CARRIERS INC | | | SCAC4 |
| 100 | ABCM | ABC TRANSPORTATION COMPANY | | | SCAC3 |
