| 6901 | BLSP | BILLS SPEED SHOP | | | SCAC4 |
| 6902 | BLSQ | BLUE STREAK CARRIERS | | | SCAC4 |
| 6903 | BLSR | BEALINE SERVICE CO INC | | | SCAC3 |
| 6904 | BLSR | BEALINE SERVICE COMPANY INC | | | SCAC4 |
| 6905 | BLSR | BLS Rail AB | | SE | VKM |
| 6906 | BLSS | BILLS TRUCKING SERVICE INC | | | SCAC3 |
| 6907 | BLSS | BLESS TRUCKING INC | | | SCAC4 |
| 6908 | BLST | BLUE STAR TRANSPORTATION | | | SCAC4 |
| 6909 | BLSU | ADMIRAL CONTAINER LINES INC LIMITED | | M | BIC |
| 6910 | BLSU | BLACK SEA SHIPPING COMPANY | | | SCAC3 |
| 6911 | BLSU | TETRA LEASING AND TRADING INC | | | SCAC4 |
| 6912 | BLSV | B L SERVICE CO | | | SCAC3 |
| 6913 | BLSV | BLUE SKY VAN LINES INC | | | SCAC4 |
| 6914 | BLSW | BLACK SWAN TRUCKING INC | | | SCAC4 |
| 6915 | BLSX | BEACON LOCOMOTIVE SERVICES | | | PWRC |
| 6916 | BLSX | BEACON LOCOMOTIVE SERVICES | | | SCAC4 |
| 6917 | BLSY | BENORE LOGISTIC SYSTEMS INC | | | SCAC4 |
| 6918 | BLT | Baltic Aviation, Inc. | Callsign: Baltair, | USA | AVCODES |
| 6919 | BLT | Air et Compagnie | Callsign: Blue Tie, Name changed to Astonfly. | F | AVCODES |
| 6920 | BLT | Astonfly | Callsign: Blue Tie, Name changed from Air et Compagnie. | F | AVCODES |
| 6921 | BLT | Baltic Aviation | | | ICAO1 |
| 6922 | BLT | BOLTON TOURS | | | SCAC4 |
| 6923 | BLT | Baselland Transport | | CH | TRAFFIC |
| 6924 | BLT | Baselland Transport | | CH | VKM |
| 6925 | BLTA | B L T TRUCKING | | | SCAC3 |
| 6926 | BLTB | BLATT, BEN | | | SCAC3 |
| 6927 | BLTC | BALTATLANTIC LINES | | | PWRC |
| 6928 | BLTC | BLAIR TRANSFER COMPANY | | | SCAC3 |
| 6929 | BLTD | BLAIR TRANSFER & STORAGE CO, MACON | | | SCAC3 |
| 6930 | BLTD | BUSHELL TRANSPORT COMPANY LTD | | | SCAC4 |
| 6931 | BLTE | BLANEY TRANSFER & STORAGE INC | | | SCAC3 |
| 6932 | BLTE | BIG L TRUCKING | | | SCAC4 |
| 6933 | BLTF | BLAIR TRANSFER & STORAGE INC | | | SCAC4 |
| 6934 | BLTG | BELUE TRUCKING CO INC | | | SCAC3 |
| 6935 | BLTG | BELUE TRUCKING CO INC | | | SCAC4 |
| 6936 | BLTH | BLACKBURN TRUCKING | | | SCAC3 |
| 6937 | BLTI | BULL DOG TRUCKING | | | SCAC3 |
| 6938 | BLTI | B & L TRANSPORT INC | | | SCAC4 |
| 6939 | BLTJ | BELTLINE MOVING CO | | | SCAC3 |
| 6940 | BLTJ | BLT LOGISTICS INC | | | SCAC4 |
| 6941 | BLTL | BLISSFIELD TRUCK LINE, INC | | | SCAC3 |
| 6942 | BLTN | BELTMANN NORTH AMERICAN | | | SCAC3 |
| 6943 | BLTN | BELL TRANSPORT INC | | | SCAC4 |
| 6944 | BLTO | BEL TRANS | | | SCAC3 |
| 6945 | BLTO | BELL TRANSPORT INC | | | SCAC4 |
| 6946 | BLTP | BLUE LINE TRANSPORTATION CO, INC | | | SCAC3 |
| 6947 | BLTP | BLUE LINE TRANSPORTATION CO INC | | | SCAC4 |
| 6948 | BLTQ | BLAIR TERMINALS INC | | | SCAC3 |
| 6949 | BLTR | BLUE LINE TRANSFER CO INC | | | PWRC |
| 6950 | BLTR | BLUE LINE TRANSFER CO | | | SCAC3 |
| 6951 | BLTR | B L T SERVICES LLC | | | SCAC4 |
| 6952 | BLTS | B L T | | | SCAC4 |
| 6953 | BLTU | BALTICON S.A. | | PL | BIC |
| 6954 | BLTU | BALTICON SP ZOO | | | SCAC4 |
| 6955 | BLTV | BELL TRANSFER & STORAGE CO INC | | | SCAC3 |
| 6956 | BLTV | B AND L TRANSPORT INC | | | SCAC4 |
| 6957 | BLTW | BALTICON LINES | | | SCAC4 |
| 6958 | BLTY | BELL TRUCKING COMPANY INC | | | SCAC3 |
| 6959 | BLTY | BLAIRS TRUCKING INC | | | SCAC4 |
| 6960 | BLU | I M P Aviation Services Ltd. | Callsign: Bluenose, | CDN | AVCODES |
| 6961 | BLU | Solutions Air Charter, LLC | Callsign: Bluegrass, | USA | AVCODES |
| 6962 | BLU | IMP Aviation Services | | | ICAO1 |
| 6963 | BLU | Blue Ridge Southern Railroad | | | RSRV |
| 6964 | BLUA | BLOUIN CARTAGE INC | | | SCAC3 |
| 6965 | BLUA | BLUE STAR TRANSPORT INC | | | SCAC4 |
| 6966 | BLUB | BLU SHIPS SRL | | | SCAC4 |
| 6967 | BLUBA | Blumberger Bahnbetrieb (Sauschwänzlebahn) | | D | TRAFFIC |
| 6968 | BLUD | BLUE, DON, HEAVY HAULING COMPANY | | | SCAC3 |
| 6969 | BLUD | BLUE DIAMOND AUTO SALES | | | SCAC4 |
| 6970 | BLUE | BLUE LINE EXPRESS INC | | | PWRC |
| 6971 | BLUE | BLUESHELL SHIPPING LTD NICOSIA CYPR | | | SCAC3 |
| 6972 | BLUEG | Blue & Gray Transit, NJ | | USA | TRAFFIC |
| 6973 | BLUEW | Blue & White Bus Company, NJ | | USA | TRAFFIC |
| 6974 | BLUF | BLUE LINE TRANSPORT INC | | | SCAC3 |
| 6975 | BLUF | BCARGO LOGISTICS USA INC | | | SCAC4 |
| 6976 | BLUG | BLUE GOOSE INC | | | SCAC3 |
| 6977 | BLUH | BLUE HEN LINES, INC | | | SCAC3 |
| 6978 | BLUI | BOWMAN, LOW TRANSPORTATION | | | SCAC3 |
| 6979 | BLUI | BALES UNLIMITED INC | | | SCAC4 |
| 6980 | BLUJ | BLUE LINE TRUCKING | | | SCAC3 |
| 6981 | BLUK | BELL TRUCKING | | | SCAC3 |
| 6982 | BLUL | BLUE LINE TRUCKING | | | SCAC4 |
| 6983 | BLUM | BLUME INC OF NEW JERSEY | | | SCAC3 |
| 6984 | BLUM | CBV Blumhardt Fahrzeuge GmbH & Co. KG | | D | TRAFFIC |
| 6985 | BLUN | BLUE CORN GALLERY | | | SCAC4 |
| 6986 | BLUO | BATTLE, LOUIE TRUCKING | | | SCAC3 |
| 6987 | BLUO | BLUE RIDGE LIMOUSINE AND TOUR SERVI | | | SCAC4 |
| 6988 | BLUP | BEST LOGISTICS USA CORP | | | SCAC4 |
| 6989 | BLUQ | BLUE LINE STORAGE COMPANY | | | SCAC3 |
| 6990 | BLUR | BALTUS TRANSPORT CO INC | | | SCAC3 |
| 6991 | BLUS | BLUE SKY SERVICES INC | | | SCAC4 |
| 6992 | BLUV | BLUE VALLEY FREIGHT LINE | | | SCAC3 |
| 6993 | BLUW | BLUM, WYLIE G | | | SCAC3 |
| 6994 | BLV | Beliview Airlines Ltd. | IATA: B3, Callsign: Bellview Airlines, IATA Prefix: 208, IATA designator changed to B3 | WAN | AVCODES |
| 6995 | BLV | Beliview Airlines Limited | IATA: B3, Callsign: Bellview Airlines, IATA Prefix: 208, Ceased operations. IATA designator changed from B3* | WAN | AVCODES |
| 6996 | BLV | Bellview Airlines | IATA: B3 | | ICAO1 |
| 6997 | BLV | Bayerischer Localbahn Verein e.V. | Bayerisch Eisenstein | D | privat-bahn.de |
| 6998 | BLV | Bayerischen Localbahn Verein e. V. | | D | TRAFFIC |
| 6999 | BLV | Bayerischer Localbahn Verein e.V | | DE | VKM |
| 7000 | BLVA | B & L TRANSPORT OF VIRGINIA INC | | | SCAC3 |
