| 12401 | BUPT | BURTON TRANSPORT | | | SCAC4 |
| 12402 | BUQC | BUSH CONSOLIDATORS INC | | | SCAC3 |
| 12403 | BUQD | BULL DOG WRECKER SERVICE | | | SCAC4 |
| 12404 | BUQK | BURNETT TRUCKING | | | SCAC3 |
| 12405 | BUQL | BULLIT TRANSPORT SERVICES INC | | | SCAC4 |
| 12406 | BUQR | BURT TRUCKING | | | SCAC3 |
| 12407 | BUQT | BURRELL TRANSPORTATION INC | | | SCAC3 |
| 12408 | BUR | Business Air AG | Callsign: Air-Business, | CH | AVCODES |
| 12409 | BUR | Burlington Airways | Callsign: Burlington, | USA | AVCODES |
| 12410 | BUR | Air Bucharest | | RO | AVCODES |
| 12411 | BURA | BELTRAN URETA, ROSARIO ANTONIO | | | SCAC4 |
| 12412 | BURB | BURRESS ANGUS | | | SCAC4 |
| 12413 | BURE | BULL RUN EXPRESS | | | SCAC3 |
| 12414 | BURE | BURTCHETT TRANSPORT INC | | | SCAC4 |
| 12415 | BURF | BURGHER, D R, INC | | | SCAC3 |
| 12416 | BURG | BURK FREIGHTWAYS INC | | | SCAC3 |
| 12417 | BURGAS | Burgasbus | City: Burgas | BG | TRAFFIC |
| 12418 | BURH | BURKE, BARNEY, TRANSFER COMPANY, IN | | | SCAC3 |
| 12419 | BURI | BURNETT ENTERPRISE | | | SCAC3 |
| 12420 | BURJ | BLUE RIBBON INC | | | SCAC4 |
| 12421 | BURK | BURKETT MOVING & STORAGE CO, INC | | | SCAC3 |
| 12422 | BURL | BURKE, P E MOVING AND STORAGE CORP | | | SCAC3 |
| 12423 | BURL | BURKEL, KEITH | | | SCAC4 |
| 12424 | BURL | | | USA | TRAFFIC |
| 12425 | BURM | BUTLER, RHETT TRUCKING INC | | | SCAC3 |
| 12426 | BURN | BURNOPP TRUCKING INC | | | SCAC4 |
| 12427 | BURO | BURGANS TRUCKING | | | SCAC3 |
| 12428 | BURP | BURGERS TRUCKING LLC | | | SCAC4 |
| 12429 | BURQ | BURST INC | | | SCAC4 |
| 12430 | BURR | BURNS, ED AND SONS TRUCKING | | | SCAC3 |
| 12431 | BURR | BURNS, ED AND SONS TRUCKING INC | | | SCAC4 |
| 12432 | BURT | BUR-TRANS INC | | | SCAC4 |
| 12433 | BURT | Burlington Transit | | CDN | TRAFFIC |
| 12434 | BURU | BAL CONTAINER LINE CO LIMITED | | HK | BIC |
| 12435 | BURV | BURKHOLDER, DAVID W | | | SCAC3 |
| 12436 | BURW | BURKINS & FOLEY TRUCKING & STORAGE, | | | SCAC3 |
| 12437 | BURW | BURLESON CARRIER COMPANY LLC | | | SCAC4 |
| 12438 | BURX | Burris Chemical, Inc. | added 1/1972; eliminated 10/1974 | | NAKINA |
| 12439 | BURX | Burris Chemical, Inc. | added 1/72; eliminated 10/74 | | NRHS |
| 12440 | BURX | bURRIS CHEMICAL, INC. | | | PWRC |
| 12441 | BURX | BURLINGTON INDUSTRIES INC | | | SCAC3 |
| 12442 | BURY | BURRY TRUCK LINE | | | SCAC3 |
| 12443 | BURZ | BURNS TRANSPORT LIMITED | | | SCAC3 |
| 12444 | BUSA | BUSCH FREIGHT SYSTEM INC | | | SCAC3 |
| 12445 | BUSA | BULKHAUL USA INC | | | SCAC4 |
| 12446 | BUSD | BUDS TRUCK & DIESEL REPAIRS | | | SCAC3 |
| 12447 | BUSF | BURRESS, RALPH L | | | SCAC3 |
| 12448 | BUSF | BURRESS LLC | | | SCAC4 |
| 12449 | BUSG | BUSH GEORGE S & CO, INC | | | SCAC3 |
| 12450 | BUSH | BUSH TERMINAL RAILROAD CO. | | | PWRC |
| 12451 | BUSH | BUSH TERMINAL RAILROAD COMPANY | | | SCAC3 |
| 12452 | BUSH | BUSH LOGISTICS SERVICE | | | SCAC4 |
| 12453 | BUSI | BUSTER TRANSPORT INC | | | SCAC3 |
| 12454 | BUSJ | BUSCHE ENTERPRISE | | | SCAC4 |
| 12455 | BUSK | BUSKIRK, J & W TRUCKING INC | | | SCAC4 |
| 12456 | BUSL | BUSSELL, LOUIS AND SON TRUCKING | | | SCAC3 |
| 12457 | BUSO | BRUNSON INC | | | SCAC3 |
| 12458 | BUSP | BUS-PAK | | | SCAC3 |
| 12459 | BUSQ | BURRIS TRANSFER & STORAGE CO INC | | | SCAC3 |
| 12460 | BUSS | BUILDERS SPECIALTIES SUPPLY INC | | | SCAC3 |
| 12461 | BUSS | BUSS, HERMAN GMBH & CIE | | | SCAC4 |
| 12462 | BUSSING | | | D | TRAFFIC |
| 12463 | BUST | BUSH MOTOR EXPRESS INC | | | SCAC3 |
| 12464 | BUST | BUSH MOTOR EXPRESS INC | | | SCAC4 |
| 12465 | BUSU | H. BUTEFUHR & SOHN GMBH & CO KG | | D | BIC |
| 12466 | BUSU | BUTEFUHR, H & SOHN GMBH & CO KG | | | SCAC4 |
| 12467 | BUSV | BURNHAM SERVICE COMPANY INC | | | SCAC3 |
| 12468 | BUSV | BURNHAM SERVICE CO INC | | | SCAC4 |
| 12469 | BUSW | BUSEN TRUCKING | | | SCAC3 |
| 12470 | BUT | Burjat Airlines | IATA: U4, Callsign: Buravia, | RUS | AVCODES |
| 12471 | BUT | Butlers Aviation | Callsign: Butlers, | BS | AVCODES |
| 12472 | BUTA | BURT, A A | | | SCAC3 |
| 12473 | BUTC | BURREN TRANSFER COMPANY | | | SCAC3 |
| 12474 | BUTC | BUTCHER TRANSPORTATION SERVICE INC | | | SCAC4 |
| 12475 | BUTD | BUECHLER TRUCKING INC | | | SCAC3 |
| 12476 | BUTE | BLUE TRUCKING | | | SCAC3 |
| 12477 | BUTE | BUTTE GRAIN MERCHANTS LTD | | | SCAC4 |
| 12478 | BUTF | BUTLER FUEL & SONS INC | | | SCAC4 |
| 12479 | BUTG | BULLET TRUCKING | | | SCAC4 |
| 12480 | BUTI | BUNERO TRUCKING | | | SCAC3 |
| 12481 | BUTI | BURTON TRUCK LINES INC | | | SCAC4 |
| 12482 | BUTJ | Butjadinger Bahn | | D | TRAFFIC |
| 12483 | BUTL | BURGGRABE TRUCK LINES, INC | | | SCAC3 |
| 12484 | BUTL | BU TRUCKING LLC | | | SCAC4 |
| 12485 | BUTM | BUTLER TRUCKING COMPANY INC (A PA C | | | SCAC3 |
| 12486 | BUTM | BUTLER TRUCKING COMPANY | | | SCAC4 |
| 12487 | BUTN | BOUTIN, V EXPRESS, INC | | | SCAC3 |
| 12488 | BUTN | BOUTIN, V EXPRESS INC | | | SCAC4 |
| 12489 | BUTO | BURRIS, RAY TRUCK LINE INC | | | SCAC3 |
| 12490 | BUTQ | BUD TRANSPORT INC | | | SCAC4 |
| 12491 | BUTR | BRUNSWICK TRAILER SALES & RV'S INC | | | SCAC4 |
| 12492 | BUTS | BULK TRANSPORT SERVICE INC | | | SCAC3 |
| 12493 | BUTT | BUTT, H E | | | SCAC4 |
| 12494 | BUTU | BROINTERMED LINES LIMITED | | GB | BIC |
| 12495 | BUTU | BROINTERMED LTD. | | | SCAC3 |
| 12496 | BUTU | BEAUTIFUL CONTAINERS LTD | | | SCAC4 |
| 12497 | BUTY | BUCHAN TRUCKING CO | | | SCAC3 |
| 12498 | BUTY | BUCHAN TRUCKING LLC | | | SCAC4 |
| 12499 | BUUC | BLUE LINE TRUCKING | | | SCAC3 |
| 12500 | BUUC | BLUE LINE TRUCKING INC | | | SCAC4 |
