| 10501 | BSAS | BELGIAN TRUCK LINES INC | | | SCAC4 |
| 10502 | BSAY | BLUE SKY TRANSPORTATION SERVICES LL | | | SCAC4 |
| 10503 | BSB | Air Wings | Callsign: Arbas, | MD | AVCODES |
| 10504 | BSB | Air Wings | | | ICAO1 |
| 10505 | BSB | Breisgau S-Bahn GmbH | Freiburg (SWEG-Tochter) | D | privat-bahn.de |
| 10506 | BSB | BIG SKY BUS LINES INC | | | SCAC4 |
| 10507 | BSB | Breisgau-S-Bahn-Gesellschaft | | D | TRAFFIC |
| 10508 | BSB | Breisgau-S-Bahngesellschaft | | DE | VKM |
| 10509 | BSBB | BASS, BOB TRUCKING | | | SCAC3 |
| 10510 | BSBC | B S B CINDER COMPANY | | | SCAC3 |
| 10511 | BSBD | BUSY BEE DELIVERY | | | SCAC3 |
| 10512 | BSBE | BOSTON-BUFFALO EXPRESS, INC | | | SCAC3 |
| 10513 | BSBE | BBX INC | | | SCAC4 |
| 10514 | BSBF | BIGGINS & SONS TRUCKING | | | SCAC4 |
| 10515 | BSBH | BACHMAN SUNNY HILL FRUIT FARM | | | SCAC4 |
| 10516 | BSBI | B S B TRUCKING INC | | | SCAC3 |
| 10517 | BSBK | BLACK & SILVER BULK CARRIERS INC | | | SCAC3 |
| 10518 | BSBM | BULLS TRUCKING | | | SCAC3 |
| 10519 | BSBM | BULLS TRUCKING | | | SCAC4 |
| 10520 | BSBP | BILLS BODY SHOP | | | SCAC3 |
| 10521 | BSBS | Braunschweiger Bahn-Service GmbH | Braunschweig | D | privat-bahn.de |
| 10522 | BSBS | BOISE SCHOOL BUS CO INC | | | SCAC3 |
| 10523 | BSBS | BSB LOGISTICS | | | SCAC4 |
| 10524 | BSBS | Bern-Scharzenburg-Bahn | Real: BSB | CH | TRAFFIC |
| 10525 | BSBS | BSBS Braunschweiger Bahn Service GmbH | | DE | VKM |
| 10526 | BSBU | BIGSTEEL BOX CORPORATION | | CDN | BIC |
| 10527 | BSBU | Bigsteel Box Corporation | | | RSRV |
| 10528 | BSBV | BILL SIGNS TRUCKING LLC | | | SCAC4 |
| 10529 | BSBX | Bethlehem Steel Bridge Corp. | 8/1920-7/1923 | | NAKINA |
| 10530 | BSBX | BETHELEHEM STEEL BRIDGE CORP. | | | PWRC |
| 10531 | BSBY | BUSBY TRUCKING INC | | | SCAC3 |
| 10532 | BSBZW | BSB-Saugbagger und Zweiwegetechnik GmbH&Co. KG | | DE | VKM |
| 10533 | BSC | Blue Sky Carrier Co. Ltd. | Callsign: Blue Steam, | PL | AVCODES |
| 10534 | BSC | AeroStan Aircompany | IATA: KW, Callsign: Big Shot, IATA Prefix: 321, | KS | AVCODES |
| 10535 | BSC | Bistair - Fez | | | ICAO1 |
| 10536 | BSC | BUCKEYE STEEL CASTINGS | | | PWRC |
| 10537 | BSCA | BRISCO TRUCKING | | | SCAC3 |
| 10538 | BSCA | BRS CARTAGE LTD | | | SCAC4 |
| 10539 | BSCB | BASIC TRANSPORTATION INC | | | SCAC3 |
| 10540 | BSCB | BRANSCOME INC | | | SCAC4 |
| 10541 | BSCD | BASSCO DRAYAGE INC | | | SCAC3 |
| 10542 | BSCE | BRUSCOE TOWBOAT COMPANY | | | SCAC3 |
| 10543 | BSCE | BLUE SKY COURIERS INC | | | SCAC4 |
| 10544 | BSCF | BARGE SERVICE CORPORATION | | | SCAC3 |
| 10545 | BSCF | BOYD SPECIAL COMMODITIES INC | | | SCAC4 |
| 10546 | BSCG | BEST CARTAGE INC | | | SCAC3 |
| 10547 | BSCG | Bus Service Center Sp, Gliwice | | PL | TRAFFIC |
| 10548 | BSCH | BERSCH TRUCKING INC | | | SCAC3 |
| 10549 | BSCH | BERTSCH TRUCKING INC | | | SCAC4 |
| 10550 | BSCK | BRISCOES TRUCKING | | | SCAC3 |
| 10551 | BSCL | BAUSCH & LOMB INC | | | SCAC3 |
| 10552 | BSCL | BLUE STAR CARRIERS INC | | | SCAC4 |
| 10553 | BSCM | BOYD SPECIAL COMMODITIES, INC | | | SCAC3 |
| 10554 | BSCM | BALTIMORE SCRAP CORP | | | SCAC4 |
| 10555 | BSCN | BOSTON CONCRETE INC | | | SCAC3 |
| 10556 | BSCO | BRASEL AND SIMS CONSTRUCTION CO | | | SCAC3 |
| 10557 | BSCP | BLISS CORPORATION | | | SCAC3 |
| 10558 | BSCQ | BALTIMORE STEVEDORING CO INC | | | SCAC3 |
| 10559 | BSCQ | BASIC TOWING INC | | | SCAC4 |
| 10560 | BSCR | BASIC TRANSPORTATION INC | | | SCAC4 |
| 10561 | BSCS | BASIC SERVICE INC | | | SCAC3 |
| 10562 | BSCT | BABA SREE CHAND EXPRESS LLC | | | SCAC4 |
| 10563 | BSCU | BESTCONT SA | | CH | BIC |
| 10564 | BSCV | BROOKE SHIPPING CORPORATION | | | SCAC3 |
| 10565 | BSCX | Bethlehem Steel Corp. | added 10/1970; 1/1975-1/1994; 7/2000-7/2005 (not listed) | | NAKINA |
| 10566 | BSCX | Brooks-Scanlon Corp. | 7/1930 | | NAKINA |
| 10567 | BSCX | Brooks-Scanlon Co. | 8/1920 | | NAKINA |
| 10568 | BSCX | Bethlehem Steel Corp. | added 10/70; 1/75-7/2000 | | NRHS |
| 10569 | BSCX | *BROOKS-SCANLON CORP. | | | PWRC |
| 10570 | BSCX | +BETHLEHEM STEEL CORPORATION | | | PWRC |
| 10571 | BSCX | Bethlehem Steel Corporation | | | RSRV |
| 10572 | BSCX | BETHLEHEM STEEL CORPORATION | | | SCAC4 |
| 10573 | BSCY | BANANA SUPPLY COMPANY INC. | | | SCAC3 |
| 10574 | BSCY | BLUE STAR CHARTERS & TOURS INC | | | SCAC4 |
| 10575 | BSD | Blue Star Airlines, S.A. de C.V. | | MEX | AVCODES |
| 10576 | BSD | Blue Star Airlines | | | ICAO1 |
| 10577 | BSDA | BSDA R.R. | added 10/1989; eliminated 7/1991; 1/1994-7/2005 | | NAKINA |
| 10578 | BSDA | BSDA R.R. | added 10/89; eliminated 7/91; 1/94-7/2000 | | NRHS |
| 10579 | BSDA | BSDA RAILROAD [BI-STATE DEVELOPMENT AGENCY RR , ST. LOUIS - OPERATED BY RAILROAD SWITCHING SERVICE OF MISSOURI (RSM)] | | | PWRC |
| 10580 | BSDA | BSDA Railroad | | | RSRV |
| 10581 | BSDA | BI-STATE DEVELOPMENT AGENCY | | | SCAC3 |
| 10582 | BSDA | BI-STATE DEVELOPMENT AGENCY | | | SCAC4 |
| 10583 | BSDB | BUSCH DISTRIBUTORS INC | | | SCAC4 |
| 10584 | BSDC | BISCONTINI DISTRIBUTION CENTERS | | | SCAC3 |
| 10585 | BSDC | BLUESTAR DISTRIBUTION INC | | | SCAC4 |
| 10586 | BSDE | BALES, DAVE INC | | | SCAC4 |
| 10587 | BSDH | BISCOE, D TRUCKING LLC | | | SCAC4 |
| 10588 | BSDI | BISORDI, LEO TRUCKING | | | SCAC3 |
| 10589 | BSDL | BEST DEDICATED LLC | | | SCAC4 |
| 10590 | BSDM | BROOKSIDE MOTOR COACH | | | SCAC3 |
| 10591 | BSDM | BOIS DAAQUAM | | | SCAC4 |
| 10592 | BSDN | BLAZING STAR DOODLES | | | SCAC4 |
| 10593 | BSDP | BLUE STREAK TRANSPORTATION INC | | | SCAC4 |
| 10594 | BSDS | BENNETTS SPEE DEE SERVICE INC | | | SCAC3 |
| 10595 | BSDS | BULLDOG SLED-ATV DECKS INC | | | SCAC4 |
| 10596 | BSDT | BRADSHAW, D T TRUCKING | | | SCAC3 |
| 10597 | BSDU | COSCO SHIPPING SPECIALIZED CARRIERS CO., LTD | | PRC | BIC |
| 10598 | BSDV | BOOKER SPECIAL DELIVERY SERVICE | | | SCAC3 |
| 10599 | BSDV | BREMER SUGAR & DISTRIBUTING CO INC | | | SCAC4 |
| 10600 | BSDX | Border States Distributing Co. | 1/1952 (not listed) | | NAKINA |
