| 501 | BAMU | BANK WINTER & CO AKTIENGESELLSCHAFT | | | SCAC3 |
| 502 | BAMV | BASIN MOVING & STORAGE | | | SCAC3 |
| 503 | BAMY | BAMBIS | | | SCAC3 |
| 504 | BAMZ | BELLE AYR MINE | | | PWRC |
| 505 | BAMZ | TRANSAMERICA LEASING D/B/A BETTER A | | | SCAC4 |
| 506 | BAN | British Antarctic Survey | Callsign: Penguin, | GB | AVCODES |
| 507 | BAN | Air Ban Ltd. | Callsign: Air Ban, | BG | AVCODES |
| 508 | BAN | Banyon Air Service | Callsign: Lauder, | USA | AVCODES |
| 509 | BAN | British Antarctic Survey | | | ICAO1 |
| 510 | BANA | BANDSTRA TRANSPORTATION SYSTEMS LTD | | | SCAC4 |
| 511 | BANB | B & B TRUCKING INC | | | SCAC3 |
| 512 | BANB | BIG ANTLER | | | SCAC4 |
| 513 | BANC | BAYNECO, INC | | | SCAC3 |
| 514 | BAND | BARNES, AKIN TRUCKING | | | SCAC3 |
| 515 | BANE | BANE TRUCKING | | | SCAC3 |
| 516 | BANF | BANFIELD BROS | | | SCAC3 |
| 517 | BANG | BANGS, H N & SONS INC | | | SCAC3 |
| 518 | BANG | BANGS, H N & SONS INC | | | SCAC4 |
| 519 | BANI | BANMAN TRUCKING | | | SCAC4 |
| 520 | BANJ | BANGERTER, J C & SONS INC | | | SCAC3 |
| 521 | BANJ | BANJUL FREIGHT LLC | | | SCAC4 |
| 522 | BANK | B & K TRANSPORTS, INC | | | SCAC3 |
| 523 | BANK | BANKES, RON MARINE SERVICES LTD | | | SCAC4 |
| 524 | BANL | BAR ANCHOR RANCH LTD | | | SCAC4 |
| 525 | BANM | BARR & MILES, INC | | | SCAC3 |
| 526 | BANM | BARR & MILES, INC | | | SCAC4 |
| 527 | BANN | BANNER EXPRESS & TRUCKING CORP | | | SCAC3 |
| 528 | BANN | BARTKEWICH, MARY ANN | | | SCAC4 |
| 529 | BANO | BANNONS R-V TRANSPORTERS | | | SCAC3 |
| 530 | BANP | BAN | | | SCAC4 |
| 531 | BANQ | KUEHNE & NAGEL INC. | | | SCAC3 |
| 532 | BANQ | BLUE ANCHOR LINE | | | SCAC4 |
| 533 | BANS | BARNES MOVING & STORAGE, INC | | | SCAC3 |
| 534 | BANT | BANOVICH, DAN PRODUCE & TRANSPORTAT | | | SCAC3 |
| 535 | Bantåg | Bantåg Nordic AB | 2002 - 2008 | S | svenska-lok.se |
| 536 | BANTAG | Bantåg Nordic AB | | S | TRAFFIC |
| 537 | BANU | BANK WINTER & CO AKTIENGESELLSCHAFT | | | PWRC |
| 538 | BANU | Bank Winter and Co | | | RSRV |
| 539 | BANU | BANK WINTER & CO. | | | SCAC3 |
| 540 | BANV | BARTON TRANSFER & STORAGE COMPANY | | | SCAC3 |
| 541 | BANV | BANTA OILFIELD SERVICE INC | | | SCAC4 |
| 542 | BANX | BANNOCK LEASING INC | | | SCAC3 |
| 543 | BANY | BRIDA, ANTHONY M INC | | | SCAC3 |
| 544 | BAO | Bay Air Cargo S/A | Callsign: Bay Cargo, | BR | AVCODES |
| 545 | BAO | Bravo Air Congo Brazzaville | IATA: Z2, | ZRE | AVCODES |
| 546 | BAO | Baden Aircraft Operations GmbH | Callsign: Avangard, | D | AVCODES |
| 547 | BAOA | BARNETT OIL CO | | | SCAC4 |
| 548 | BAOB | BOBS AUTO BODY INC | | | SCAC3 |
| 549 | BAOC | BASILE OIL COMPANY | | | SCAC4 |
| 550 | BAOD | BAUMAN OIL DISTRIBUTORS INC | | | SCAC4 |
| 551 | BAOE | BLUE ARROW EXPRESS INC | | | SCAC3 |
| 552 | BAOE | BARTON TRANSPORT INC | | | SCAC4 |
| 553 | BAOF | BALIO, COSMO | | | SCAC3 |
| 554 | BAOF | B A O FUEL LLC | | | SCAC4 |
| 555 | BAOG | BARTO TRUCKING LLC | | | SCAC4 |
| 556 | BAOI | BARON TRUCKING INC | | | SCAC3 |
| 557 | BAOI | BASEL OIL CO INC | | | SCAC4 |
| 558 | BAOJ | BARTON, JOSEPH INC | | | SCAC3 |
| 559 | BAOK | BAROLE TRUCKING INC | | | SCAC3 |
| 560 | BAOK | BAROLE TRUCKING INC | | | SCAC4 |
| 561 | BAOL | BAER OF LAKE PARK INC | | | SCAC3 |
| 562 | BAOM | BAIN OIL COMPANY INCORPORATED | | | SCAC4 |
| 563 | BAOO | BANNER TRUCK LINE | | | SCAC3 |
| 564 | BAOO | BANDOO, A D & SON TRANSPORT INC | | | SCAC4 |
| 565 | BAOQ | BAIRD OIL CO | | | SCAC4 |
| 566 | BAOR | BARLOW, R A LLC | | | SCAC4 |
| 567 | BAOT | BAO-TRANS ENTERPRISES | | | SCAC3 |
| 568 | BAOX | British American Oil Co. | 7/1937-10/1957; eliminated 4/1960 | | NAKINA |
| 569 | BAOX | Canadian General Transit Co., Ltd. | added 4/1960; 4/1961 (not listed); eliminated 4/1961 | | NAKINA |
| 570 | BAOX | The British American Oil Co., Ltd. | 8/1920-7/1935 | | NAKINA |
| 571 | BAOX | British American Oil Co. | 4/38-10/57 | | NRHS |
| 572 | BAOX | Canadian General Transit Co., Ltd. | 4/61; eliminated 4/61 | | NRHS |
| 573 | BAOX | *BRITISH AMERICAN OIL CO. | | | PWRC |
| 574 | BAOX | *CANADIAN GENERAL TRANSIT CO., LTD. | | | PWRC |
| 575 | BAP | Trans International Express | Callsign: Big Apple, Designator 5B recalled by IATA | USA | AVCODES |
| 576 | BAP | Trans International Express | IATA: 5B, Callsign: Big Apple, Designator 5B recalled by IATA. Name changed from Tie Aviation | USA | AVCODES |
| 577 | BAP | Tie Aviation | IATA: 5B, Callsign: Big Apple, Name changed to Trans International Express | USA | AVCODES |
| 578 | BAP | Trans International Express Aviation | | | ICAO1 |
| 579 | BAP | Butte, Anaconda & Pacific Ry. | 4/1938-10/1966 & 1/1975-1/1980; eliminated 7/1985 | | NAKINA |
| 580 | BAP | Butte, Anaconda & Pacific Ry. | 4/38-10/66 & 1/75-1/80 | | NRHS |
| 581 | BAP | BUTTE, ANACONDA & PACIFIC RY | | | PWRC |
| 582 | BAP | Butte, Anaconda and Pacific Railway | | | RSRV |
| 583 | BAP | Butte, Anaconda & Pacific Ry. | | USA | TRAFFIC |
| 584 | BAPC | B & P CARTAGE | | | SCAC3 |
| 585 | BAPC | BETTIS ASPHALT & CONSTRUCTION INC | | | SCAC4 |
| 586 | BAPD | BARTOLI'S RAPID TRANSIT DELIVERY | | | SCAC3 |
| 587 | BAPD | BIMMER AUTO PARTS LTD | | | SCAC4 |
| 588 | BAPE | BASIN TRANSPORTS | | | SCAC3 |
| 589 | BAPE | BAP EQUIPMENT LTD | | | SCAC4 |
| 590 | BAPG | BAY AREA PIGGYBACK | | | SCAC3 |
| 591 | BAPI | B & A TRANSPORTATION INC | | | SCAC3 |
| 592 | BAPP | BAY SHIPPERS LLC | | | SCAC4 |
| 593 | BAPR | BACA TRANSPORT | | | SCAC3 |
| 594 | BAPS | BARRETTS PICKUP SERVICE | | | SCAC3 |
| 595 | BAPT | BAKERY PRODUCTS TRANSPORT, INC | | | SCAC3 |
| 596 | BAPU | Bechtel International | | | RSRV |
| 597 | BAPX | The Barber Asphalt Paving Co. | 8/1920-7/1923 | | NAKINA |
| 598 | BAPX | *BARBER ASPHALT PAVING CO. | | | PWRC |
| 599 | BAPX | *BAY AREA PIGGYBACK INCORPORATED | | | PWRC |
| 600 | BAPX | Bay Area Piggyback | | | RSRV |
