| 901 | AAZC | AURORA AUSTRALIS MARITIME CORP. | | | SCAC3 |
| 902 | AAZM | ALL AMERICAN MOBILE HOME MOVERS | | | SCAC3 |
| 903 | AAZP | ANACONDA TRANSPORT | | | SCAC4 |
| 904 | AAZT | ARA TRANSPORTATION | | | SCAC4 |
| 905 | AAZV | ALL AMERICAN TRANSPORT INC | | | SCAC3 |
| 906 | 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 |
| 907 | AB | Superior Aviation, Inc. | ICAO: HKA, Callsign: Spend Air, IATA designator changed to SO | USA | AVCODES |
| 908 | AB | Air Cortez International | | USA | AVCODES |
| 909 | AB | Manila Aviation Services, Inc. | Callsign: Manila Aviation, | RP | AVCODES |
| 910 | 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 |
| 911 | AB | KAP.kg Aircompany LLC | ICAO: KGS, Callsign: Berkut, | KS | AVCODES |
| 912 | AB | Bonza Aviation Pty Ltd. | ICAO: BNZ, Callsign: Bonza, | AUS | AVCODES |
| 913 | AB | Amagerbanen | 1907 - 1974 | DK | jernbanen.dk |
| 914 | AB | Akron Barberton Cluster Ry. Co. | added 10/1994; 7/2000-7/2005 | | NAKINA |
| 915 | AB | Akron Barberton Cluster Ry. Co. | added 10/94; 7/2000 | | NRHS |
| 916 | AB | Angeln Bahn GmbH | Flensburg | D | privat-bahn.de |
| 917 | AB | AKRON BARBERTON CLUSTER RAILWAY COMPANY | | | PWRC |
| 918 | AB | Akron Barberton Cluster Railway | | | RSRV |
| 919 | AB | AKRON BARBERTON CLUSTER RAILWAY COM | | | SCAC4 |
| 920 | AB | Appenzeller Bahnen | | CH | TRAFFIC |
| 921 | AB | Appenzeller Bahnen | | CH | VKM |
| 922 | ABA | Artem-Avia | Callsign: Arten-Avia, | UA | AVCODES |
| 923 | ABA | Abacus Air | IATA: VM, Callsign: Abacus, | D | AVCODES |
| 924 | ABA | Aero-Beta GmbH & Co. KG. | Callsign: Aerobeta, | D | AVCODES |
| 925 | ABA | Artem-Avia | | | ICAO1 |
| 926 | ABA | Amtsbanerne på Als | 1898 - 1933 | DK | jernbanen.dk |
| 927 | ABA | Amtsbanerne på Als | 1898 - 1933 | DK | TRAFFIC |
| 928 | ABAA | ALBANY AUTO AUCTION INC | | | SCAC3 |
| 929 | ABAB | ALBA SOLE TOURISM INC | | | SCAC3 |
| 930 | ABAC | A B A TRUCKING CORPORATION | | | SCAC3 |
| 931 | ABAE | AMBASSADOR EXPRESS SERVICES | | | SCAC3 |
| 932 | ABAF | ABC AIR FREIGHT INC | | | SCAC3 |
| 933 | ABAG | A BAGGAGE & TRANSFER | | | SCAC3 |
| 934 | ABAI | A B B A DISTRIBUTION SERVICES INC | | | SCAC3 |
| 935 | ABAJ | A B A S TRANSPORTATION INC | | | SCAC3 |
| 936 | ABAL | ALABAMA CARRIERS INC | | | SCAC3 |
| 937 | ABAM | ALABAMA AMERICAN TOURS | | | SCAC3 |
| 938 | ABAO | ALBURY AND COMPANY | | | SCAC3 |
| 939 | ABAO | ACE OF BAITS INC | | | SCAC4 |
| 940 | ABAP | A & B ASSEMBLY & PACKAGING CO INC | | | SCAC3 |
| 941 | ABAP | ABATE TRANSPORTATION LLC | | | SCAC4 |
| 942 | ABAQ | ABLE AIR FREIGHT INC | | | SCAC3 |
| 943 | ABAU | ABAC TRANSPORT LTD. | | | SCAC3 |
| 944 | ABAV | ABCO AMERICAN VAN LINES | | | SCAC3 |
| 945 | ABAV | AB Aviation | | COM | TRAFFIC |
| 946 | ABAY | ALL BAY CITIES TRUCKING INC | | | SCAC3 |
| 947 | 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 |
| 948 | ABB | African Business and Transportations | Callsign: African Business, | ZRE | AVCODES |
| 949 | ABB | Air Belgium International | IATA: VY, Callsign: Air Belgium, IATA designator changed to AJ. Name chaneged from Abelag Airways | B | AVCODES |
| 950 | ABB | Air Belgium SA | IATA: KF, Callsign: Air Belgium, | B | AVCODES |
| 951 | ABB | African Business and Transportations | | | ICAO1 |
| 952 | ABB | Akron & Barberton Belt R.R. Co. | 1/1975-1/1994; eliminated 4/1995; 7/2000-7/2005 | | NAKINA |
| 953 | ABB | Akron & Barberton Belt R.R. Co. | 1/75-1/94; eliminated 4/95; 7/2000 | | NRHS |
| 954 | ABB | AKRON & BARBERTON BELT RAILROAD | | | PWRC |
| 955 | ABB | Akron and Barberton Belt Railroad | | | RSRV |
| 956 | ABB | ABB AB | | SE | VKM |
| 957 | ABBA | ABBAS TRUCKING | | | SCAC3 |
| 958 | ABBA | ABBA HOLDINGS LTD | | | SCAC4 |
| 959 | ABBB | ABBOTT BUS LINES INC | | | SCAC3 |
| 960 | ABBB | ABBOTT BUS LINES INC | | | SCAC4 |
| 961 | ABBC | ABBOTT CONSTRUCTION COMPANY | | | SCAC3 |
| 962 | ABBC | ABBEYS SPECIALIZED HAULERS LLC | | | SCAC4 |
| 963 | ABBD | ABBEY FORWARDING | | | SCAC3 |
| 964 | ABBE | APB SERVICES | | | SCAC4 |
| 965 | ABBF | A BEST BUY PREMIUM FUEL & TRUCKING | | | SCAC4 |
| 966 | ABBG | A & B TRUCKING INCORPORATED | | | SCAC3 |
| 967 | ABBK | ABBOT TRUCKING | | | SCAC3 |
| 968 | ABBM | ATLANTIC BOAT TRANSPORTATION INC | | | SCAC4 |
| 969 | ABBN | ABEL TRANSPORTATION | | | SCAC3 |
| 970 | ABBP | ABBOTT, PAUL TRUCKING | | | SCAC3 |
| 971 | ABBQ | ABBOT & CO | | | SCAC3 |
| 972 | ABBS | ABBS MOVING SERVICE INC | | | SCAC3 |
| 973 | ABBT | ABBOTT OIL COMPANY INC | | | SCAC4 |
| 974 | ABBU | ATLANTIC BULK CARRIERS MANAGMENT LTD | | USA | BIC |
| 975 | ABBU | Atlantic Bulk Carriers Managment | | | RSRV |
| 976 | ABBU | ATLANTIC BULK CARRIERS LTD | | | SCAC3 |
| 977 | ABBU | ATLANTIC BULK CARRIERS LTD | | | SCAC4 |
| 978 | ABBV | ABBA INTERNATIONAL, INC | | | SCAC3 |
| 979 | ABBW | ABBCO | | | SCAC3 |
| 980 | ABBX | Abbott Labs | added 1/1982; 1/1985; eliminated 4/1993; 1/1994-7/2005 (not listed) | | NAKINA |
| 981 | ABBX | Abbott Labs | added 1/82; eliminated 4/93; 1/94-7/2000 | | NRHS |
| 982 | ABBX | ABBOTT LABS | | | PWRC |
| 983 | ABBX | Abbott Labs | | | RSRV |
| 984 | ABBX | ABBOTT LABS | | | SCAC4 |
| 985 | ABBY | A & B BUS COMPANY INC | | | SCAC3 |
| 986 | ABBY | ABBY GAS SERVICE | | | SCAC4 |
| 987 | ABC | OAG Worldwide | IATA: CR, Name changed to UBM Aviation - OAG. Non-airline Org. in airline industry | GB | AVCODES |
| 988 | ABC | ATLANTA, BIRMINGHAM AND COAST RAILROAD | | | PWRC |
| 989 | ABCA | ABC MOVING & STORAGE | | | SCAC3 |
| 990 | ABCA | AMERICAN BEST CARE TRANSPORTATION L | | | SCAC4 |
| 991 | ABCAR | AB Prijevoz d.o.o. | | HR | VKM |
| 992 | ABCB | ABC BONDED WAREHOUSES | | | SCAC3 |
| 993 | ABCE | ABC FREIGHT INC | | | SCAC3 |
| 994 | ABCF | ABC DISCOUNT AUTO TRANSPORT INC | | | SCAC3 |
| 995 | ABCF | ABC/FRY-WAGNER INC | | | SCAC4 |
| 996 | ABCH | A B C MOVING AND STORAGE INC | | | SCAC3 |
| 997 | ABCH | A B C MOVING AND STORAGE INC | | | SCAC4 |
| 998 | ABCI | ABC MOVING & STORAGE | | | SCAC3 |
| 999 | ABCI | ATLANTIC BULK CARRIERS MANAGEMENT L | | | SCAC4 |
| 1000 | ABCK | Alaska British Columbia Transportation Co. | 1/1980-1/1994 | | NAKINA |
