| 8401 | BNZI | BONANZA INC | | | SCAC3 |
| 8402 | BNZI | B AND Z TRUCKING INC | | | SCAC4 |
| 8403 | BNZJ | BENTZ, JIM INC | | | SCAC3 |
| 8404 | BNZK | BONANZA TRUCKING INC | | | SCAC4 |
| 8405 | BNZL | BRONZE LINE INC | | | SCAC3 |
| 8406 | BNZO | BENZ OIL INC | | | SCAC4 |
| 8407 | BNZT | BENZ TRANSPORTATION INC | | | SCAC3 |
| 8408 | BNZT | BENZ TRANSPORTATION INC | | | SCAC4 |
| 8409 | BNZV | BONANZA VAN LINES | | | SCAC3 |
| 8410 | BO | PT Bouraq Indonesia Airlines | ICAO: BOU, Callsign: Bouraq, IATA Prefix: 666, | RI | AVCODES |
| 8411 | BO | Air Columbus | ICAO: CNB, Callsign: Air Columbus, Ceased operations | P | AVCODES |
| 8412 | BO | Delta Air Regionalflugverkhr GmbH | ICAO: DEL, Callsign: Bravo Oscar, ICAO callsign changed to Delta Air | D | AVCODES |
| 8413 | BO | AirBridge Cargo Airlines Limited | ICAO: ABW, Callsign: AirBridge Cargo, IATA Prefix: 580, IATA designator changed to RU | RUS | AVCODES |
| 8414 | BO | Delta Air Regionalflugverkhr GmbH | ICAO: DEL, Callsign: Delta Air, IATA Designator changed to DI. ICAO callsign changed from Bravo Oscar | D | AVCODES |
| 8415 | BO | BB Airways Pvt. Limited | ICAO: BBW, Callsign: BeeBee Airways, IATA Prefix: 505, Founded in January 2012. Commenced operations on 13 September 2012. Ceased operations in July 2013. | NEP | AVCODES |
| 8416 | BO | Bláfugl ehf. d/b/a Bluebird Cargo Ltd. | ICAO: BBD, Callsign: Blue Cargo, IATA Prefix: 290, Established in 1999. Name changed to Bl�fugl ehf d/b/a bluebird NORDIC. IATA designator changed from BF. | IS | AVCODES |
| 8417 | BO | Bláfugl ehf. d/b/a bluebird NORDIC | ICAO: BBD, Callsign: Blue Cargo, IATA Prefix: 290, Established in 1999. Name changed from Bl�fugl ehf d/b/a Bluebird Cargo Ltd. IATA designator changed from BF. | IS | AVCODES |
| 8418 | BO | CSX Transportation, Inc. | added 10/1987; 1/1994-7/2005 | | NAKINA |
| 8419 | BO | Baltimore & Ohio R.R. Co. | 1/1975-1/1980; eliminated 7/1987 | | NAKINA |
| 8420 | BO | The Chesapeake and Ohio Ry. Co. | added 7/1987; eliminated 10/1987 | | NAKINA |
| 8421 | BO | Baltimore & Ohio R.R. Co. | 1/75-1/80; eliminated 7/87 | | NRHS |
| 8422 | BO | The Chesapeake and Ohio Ry. Co. | added 7/87; eliminated 10/87 | | NRHS |
| 8423 | BO | CSX Transportation, Inc. | added 10/87; 1/94-7/2000 | | NRHS |
| 8424 | BO | CSX [BALTIMORE & OHIO RR] | | | PWRC |
| 8425 | BO | Baltimore and Ohio Railroad (CSX Transportation) | | | RSRV |
| 8426 | BO | Baltimore and Ohio | | USA | TRAFFIC |
| 8427 | BOA | Boniair D.O.O.E.L. | Callsign: Kumanovo, Founded in 1996. | MK | AVCODES |
| 8428 | BOA | Boniair | | | ICAO1 |
| 8429 | BOAB | BOALS, BERNARD B | | | SCAC3 |
| 8430 | BOAC | British Overseas Airways Corporation | | GB | TRAFFIC |
| 8431 | BOAD | BROAD TOP MINING & TRUCKING COMPANY | | | SCAC3 |
| 8432 | BOAE | BLUE OX EQUIPMENT INC | | | SCAC4 |
| 8433 | BOAG | BOAG WAREHOUSE COMPANY | | | SCAC3 |
| 8434 | BOAG | Borner Transport und Lagerhaus AG | | CH | VKM |
| 8435 | BOAI | BOWKER, GRANT | | | SCAC4 |
| 8436 | BOAJ | BONNER, A JAMES | | | SCAC3 |
| 8437 | BOAJ | BOUNDARY ELECTRIC (1985) LTD | | | SCAC4 |
| 8438 | BOAK | BROOKS AERO INC | | | SCAC3 |
| 8439 | BOAM | BOOTH AMERICAN SHIPPING CORPORATION | | | SCAC3 |
| 8440 | BOAM | BOYZ TRANSPORTATION SERVICES LLC | | | SCAC4 |
| 8441 | BOAN | BOWEN DELIVERY SERVICE INC | | | SCAC4 |
| 8442 | BOAQ | BOBS APPLICANCE DELIVERY SERVICE | | | SCAC3 |
| 8443 | BOAR | BORING, AL TRUCKING | | | SCAC3 |
| 8444 | BOAR | BAZAAR DE MEXICO INC | | | SCAC4 |
| 8445 | BOAS | BOLDUC & SONS INC | | | SCAC3 |
| 8446 | BOAS | BOLDUC AND SONS INC | | | SCAC4 |
| 8447 | BOAY | BOWEN, ALBERT E INC | | | SCAC3 |
| 8448 | BOAY | BR MOVERS | | | SCAC4 |
| 8449 | BOB | Jet Club Ltd. | Callsign: Bob Jet, | PL | AVCODES |
| 8450 | BOB | Bonair Business Charter GmbH | Callsign: Bob, ICAO callsign changed to Twister | D | AVCODES |
| 8451 | BOB | Bonair Business Charter GmbH | Callsign: Twister, ICAO callsign changed from Bob | D | AVCODES |
| 8452 | BOB | MLP Aviation | Callsign: Bobfly, | GB | AVCODES |
| 8453 | BOB | Backbone Aviation A/S | Callsign: Backbone, | DK | AVCODES |
| 8454 | BOB | Bayerische Oberlandbahn GmbH | Holzkirchen (auch BayOB, Connex-Gruppe > Veolia Verkehr) | D | privat-bahn.de |
| 8455 | BOB | Bodensee-Oberschwaben Bahn GmbH | Friedrichshafen | D | privat-bahn.de |
| 8456 | BOB | Bayerische Oberlandbahn | | D | TRAFFIC |
| 8457 | BOB | Berner Oberland Bahnen | | CH | VKM |
| 8458 | BOBA | BOBCAT COMPANY | | | SCAC4 |
| 8459 | BOBB | BOBS BROKERAGE INC | | | SCAC4 |
| 8460 | BOBC | BOUCHER, L S EXPRESS INC | | | SCAC4 |
| 8461 | BOBD | BOARDMAN, BUDDY TRUCKING | | | SCAC3 |
| 8462 | BOBE | BOBS EXPRESS LINE | | | SCAC3 |
| 8463 | BOBF | BOBS TRANSFER INC | | | SCAC3 |
| 8464 | BOBFN | Bodensee-Oberschwaben-Bahn | | DE | VKM |
| 8465 | BOBG | BOBS TRUCKING | | | SCAC3 |
| 8466 | BOBG | BOBS GARAGE INC | | | SCAC4 |
| 8467 | BOBH | BOBS HI DISTRIBUTORS | | | SCAC3 |
| 8468 | BOBH | BLOOM DEPOT INC | | | SCAC4 |
| 8469 | BOBI | BOBBITT TRUCKING | | | SCAC4 |
| 8470 | BOBJ | BUTTERBAUGH OIL CO INC | | | SCAC4 |
| 8471 | BOBK | BOYD, BOB TRUCKING INC | | | SCAC3 |
| 8472 | BOBN | BOBS TRUCKING | | | SCAC3 |
| 8473 | BOBN | BANNER TRANSPORT INC | | | SCAC4 |
| 8474 | BOBO | BOBS DELIVERY SERVICE | | | SCAC3 |
| 8475 | BOBO | BOB-O EXPRESS | | | SCAC4 |
| 8476 | BOBP | BOBS TRANSFER & STORAGE | | | SCAC3 |
| 8477 | BOBP | BYRD TRANSPORT INC | | | SCAC4 |
| 8478 | BOBQ | BOBB, MICHAEL J INC | | | SCAC3 |
| 8479 | BOBR | BORDER BROKERAGE INC | | | SCAC3 |
| 8480 | BOBR | BUSINESS SOLUTIONS INTERNATIONAL IN | | | SCAC4 |
| 8481 | BOBT | B & B TRAVEL INC | | | SCAC3 |
| 8482 | BOBU | LANXESS SOLUTIONS UK LTD | | GB | BIC |
| 8483 | BOBU | GREAT LAKES UK LTD | | | SCAC4 |
| 8484 | BOBV | BOBO TRANSPORT | | | SCAC4 |
| 8485 | BOBX | Freeman Gas of N.C., Inc. | added 1/1971; 1/1975-7/2000; eliminated 4/2003; 7/2005 (not listed) | | NAKINA |
| 8486 | BOBX | Freeman Gas of N.C., Inc. | added 1/71; 1/75-7/2000 | | NRHS |
| 8487 | BOBX | FREEMAN GAS OF NORTH CAROLINA | | | PWRC |
| 8488 | BOBX | Freeman Gas of N.C. | | | RSRV |
| 8489 | BOBX | FREEMAN GAS | | | SCAC4 |
| 8490 | BOBY | BOBBYS TOURS | | | SCAC3 |
| 8491 | BOBY | Bayerische Oberlandbahn | | DE | VKM |
| 8492 | BOC | Aerobona, S.A. de C.V. | Callsign: Aerobona, | MEX | AVCODES |
| 8493 | BOC | Aerobona | | | ICAO1 |
| 8494 | BOC | BORTNER BUS COMPANY | | | PWRC |
| 8495 | BOC | BORTNER BUS COMPANY | | | SCAC4 |
| 8496 | BOCA | BOSTON COACH CORP | | | SCAC3 |
| 8497 | BOCB | BELLMAN OIL CO INC | | | SCAC4 |
| 8498 | BOCC | BOCCHI, A TRUCKING, INC | | | SCAC3 |
| 8499 | BOCD | BOSTON CARRIERS, INC | | | SCAC3 |
| 8500 | BOCD | BROCK, T INC | | | SCAC4 |
