| 901 | BAYX | BAYER CORPORATION | | | SCAC4 |
| 902 | BAYY | BAY OIL COMPANY | | | SCAC4 |
| 903 | BAYZ | BAY COUNTY | | | PWRC |
| 904 | BAZ | Bargouzin Airline | Callsign: Bargouzin, | RUS | AVCODES |
| 905 | BAZ | Chernihiv Automotive Plant | | UA | TRAFFIC |
| 906 | BAZN | BARZEN INTERNATIONAL INC | | | SCAC3 |
| 907 | BAZN | BAZENTINE LIVESTOCK LTD | | | SCAC4 |
| 908 | BAZO | BARTLETT, JAMES TRUCKING | | | SCAC3 |
| 909 | BAZP | BAZUA PEREZ, ROSALIA | | | SCAC4 |
| 910 | BAZQ | BATTS TRANSFER | | | SCAC3 |
| 911 | BAZS | BONANZA ANTIQUES | | | SCAC4 |
| 912 | BAZW | BARTZ, WINN TRUCKING INC | | | SCAC3 |
| 913 | BAZX | Bay Chemical Co., Inc. | added 4/1973; 1/1975-1/1980; eliminated 1/1986 | | NAKINA |
| 914 | BAZX | Bay Zinc Co., Inc. | added 1/1986; eliminated 7/1987 | | NAKINA |
| 915 | BAZX | Bay Chemical Co., Inc. | added 4/73; 1/75-1/80; eliminated 1/86 | | NRHS |
| 916 | BAZX | Bay Zinc Co., Inc. | added 1/86; eliminated 7/87 | | NRHS |
| 917 | BAZX | BAY ZINC CO. [BAY CHEMICAL CO.] | | | PWRC |
| 918 | BAZX | Bay Chemical | | | RSRV |
| 919 | BB | Seaborne Airlines | ICAO: SBS, Callsign: Seaborne, Name changed from Seaborne Aviation, Inc. Establish in 1992 | USA | AVCODES |
| 920 | BB | Seaborne Aviation, Inc. | ICAO: SBS, Callsign: Seaborne, Name changed to Seaborne Airlines. Establish in 1992 | USA | AVCODES |
| 921 | BB | Balair / CTA Leisure Ltd. | ICAO: BBB, Callsign: Balair, Name changed to Belair 02 November 2001. | CH | AVCODES |
| 922 | BB | Air Great Lakes PYT Ltd. | | AUS | AVCODES |
| 923 | BB | Balair S.A. | ICAO: BBB, Callsign: Balair, Merged with CTA and name changed to Balair / CTA Leisure Ltd. | CH | AVCODES |
| 924 | BB | Blackhawk Airways, Inc. | ICAO: BAK, Callsign: Blackhawk, Ceased operations. | USA | AVCODES |
| 925 | BB | Cargo B Airlines | ICAO: CBB, Callsign: Cargo-Bee, Ceased operations on 01 July 2009 | B | AVCODES |
| 926 | BB | TopBrass Aviation Limited | ICAO: BRL, Callsign: Brass Line, Designator BB recalled by IATA | WAN | AVCODES |
| 927 | BB | Buckingham Branch R.R. Co. | added 7/1989; 1/1994-7/2005 | | NAKINA |
| 928 | BB | Buckingham Branch R.R. Co. | added 7/89; 1/94-7/2000 | | NRHS |
| 929 | BB | BUCKINGHAM BRANCH RAILROAD COMPANY | | | PWRC |
| 930 | BB | Buckingham Branch Railroad | | | RSRV |
| 931 | BB | | | CH | TRAFFIC |
| 932 | BB | Baggerbetrieb Burkhardt GmbH | | DE | VKM |
| 933 | BBA | Bannert Air | Callsign: Banair, | A | AVCODES |
| 934 | BBA | Bombardier, Inc. | Callsign: Bombardier, | CDN | AVCODES |
| 935 | BBA | Bannert Air | | | ICAO1 |
| 936 | BBA | Brabantsche Buurtspoorwegen en Autodiensten | | NL | TRAFFIC |
| 937 | BBAB | B B & B INC | | | SCAC3 |
| 938 | BBAB | B & B INDUSTRIES, INC | | | SCAC4 |
| 939 | BBAC | BOBAC TRUCKING CO INC | | | SCAC3 |
| 940 | BBAE | B & B AIR EXPRESS INC | | | SCAC3 |
| 941 | BBAE | B & B COMMERCIAL TRUCKING LLC | | | SCAC4 |
| 942 | BBAF | BURBANK FREIGHT DIVISION | | | SCAC3 |
| 943 | BBAF | B & B MOVERS IINC | | | SCAC4 |
| 944 | BBAG | BILL BLACK AGENCY INC | | | SCAC3 |
| 945 | BBAG | BV BOUWGRONDSTOFFEN AGM | | | SCAC4 |
| 946 | BBAH | BO-BACHS' TRANSPORT, INC. | | | SCAC3 |
| 947 | BBAK | BOBBER AUTO/TRUCK PLAZA | | | SCAC3 |
| 948 | BBAL | B B & L INCORPORATED | | | SCAC3 |
| 949 | BBAM | BELTRAN BROS LLC | | | SCAC4 |
| 950 | BBAO | B & B AUTO TRANSPORT | | | SCAC3 |
| 951 | BBAP | BARBICAN ARCHITECTURAL PRODUCTS LTD | | | SCAC4 |
| 952 | BBAR | BROWN, BYRON AND ROBERT | | | SCAC3 |
| 953 | BBAR | BEST BET AUTO | | | SCAC4 |
| 954 | BBAS | BOBS AUTO SERVICE INC | | | SCAC3 |
| 955 | BBAT | B A R TRANSPORTATION CO | | | SCAC3 |
| 956 | BBAT | BURTS RELIABLE INC | | | SCAC4 |
| 957 | BBAW | BARBAS TRUCKING CO INC | | | SCAC3 |
| 958 | BBB | Balair / CTA Leisure Ltd. | IATA: BB, Callsign: Balair, Name changed to Belair 02 November 2001. | CH | AVCODES |
| 959 | BBB | Balair S.A. | IATA: BB, Callsign: Balair, Merged with CTA and name changed to Balair / CTA Leisure Ltd. | CH | AVCODES |
| 960 | BBB | Swedjet Airways AB | IATA: VD, Callsign: Blackbird, Designator VD recalled by IATA | S | AVCODES |
| 961 | BBB | Blackbird Air Charter A/S | Callsign: Blackbird, Founded on 05 January 2015. Commeced operation on 01 October 2017. | DK | AVCODES |
| 962 | BBB | SwedJet Airways | IATA: VD | | ICAO1 |
| 963 | BBB | Bayer. Bahn Betriebs GmbH | Nördlingen | D | privat-bahn.de |
| 964 | BBB | BUSY BEE BUS TOURS | | | SCAC4 |
| 965 | BBB | Big Blue Bus | City: Santa Monica | US-CA | TRAFFIC |
| 966 | BBBB | BB BLANC AUDIO VISUAL & ENTERTAINME | | | SCAC4 |
| 967 | BBBC | B & B BUS CORPORAITON | | | SCAC3 |
| 968 | BBBC | BBC GLOBAL | | | SCAC4 |
| 969 | BBBD | B & B TRANSPORT | | | SCAC4 |
| 970 | BBBE | B-BAR-B EXPRESS | | | SCAC3 |
| 971 | BBBE | B B T | | | SCAC4 |
| 972 | BBBK | B & B TRUCK LINES INC | | | SCAC3 |
| 973 | BBBL | BIG BILLS BUS LINES INC | | | SCAC3 |
| 974 | BBBL | B B B AUTO ENTERPRISE LLC | | | SCAC4 |
| 975 | BBBM | (NATX) GENERAL ELECTRIC RAILCAR SERVICES CORPORATION | | | PWRC |
| 976 | BBBM | BURRELL BATEMAN BUS LINES LTD | | | SCAC3 |
| 977 | BBBN | BURNS BURNS & BURNS INC | | | SCAC4 |
| 978 | BBBO | BIBB COUNTY OIL CO INC | | | SCAC4 |
| 979 | BBBR | BAR HARBOR BAIT COMPANY | | | SCAC4 |
| 980 | BBBS | BIBBS BROKERAGE INC | | | SCAC4 |
| 981 | BBBW | BLACK BOW TRANSPORTATION INC | | | SCAC4 |
| 982 | BBBX | B.B. Blair | added 7/1965; 7/1965; eliminated 1/1966 | | NAKINA |
| 983 | BBBX | B.B. Blair Co. | added 4/1963; eliminated 7/1965 | | NAKINA |
| 984 | BBBX | B.B. Blair Co. | eliminated 7/65 | | NRHS |
| 985 | BBBX | B.B. Blair | added 7/65; 7/65; eliminated 1/66 | | NRHS |
| 986 | BBBX | B. B. BLAIR CO. | | | PWRC |
| 987 | BBC | Biman Bangladesh Airlines | IATA: BG, Callsign: Bangladesh, IATA Prefix: 997, | BD | AVCODES |
| 988 | BBC | Biman Bangladesh Airlines | IATA: BG | | ICAO1 |
| 989 | BBC | Brown, Boveri & Compagnie | | CH | TRAFFIC |
| 990 | BBCA | Biman Bangladesh Airlines | Real: BBC | BD | TRAFFIC |
| 991 | BBCB | BBC CUSTOM COACH INC | | | SCAC3 |
| 992 | BBCC | BUSY BEE CAB COMPANY | | | SCAC3 |
| 993 | BBCC | BELL BROS CARGO LLC | | | SCAC4 |
| 994 | BBCD | BEULAH BAPTIST CHURCH OF DEKALB COU | | | SCAC3 |
| 995 | BBCH | BBC CHARTERING & LOGISTIC GMBH & CO | | | SCAC4 |
| 996 | BBCI | BIG BEAR CARTAGE INC | | | SCAC3 |
| 997 | BBCI | BROTHERS BAKING CO INC | | | SCAC4 |
| 998 | BBCJ | BIERI BROKERAGE CO INC | | | SCAC4 |
| 999 | BBCK | BALL&BALL TRUCKING, INC | | | SCAC3 |
| 1000 | BBCK | BALL & BALL TRUCKING INC | | | SCAC4 |
