| 9501 | BR&P | Buffalo, Rochester & Pittsburgh Ry. Co. | 23-Jul | | NRHS |
| 9502 | BR&P | Baltimore & Ohio R.R. | Apr-38 | | NRHS |
| 9503 | BR&P | BALTIMORE & OHIO RAILROAD [BUFFALO, ROCHESTER & PITTSBURGH RWY. CO.] | | | PWRC |
| 9504 | BRA | Braathens ASA | IATA: BU, Callsign: Braathens, IATA Prefix: 154, ICAO callsign changed to Scanor. Formerly Braathens South American and Far East Airtransport A/S | N | AVCODES |
| 9505 | BRA | Braathens South American and Far East Air Transport | IATA: BU, IATA Prefix: 154, | N | AVCODES |
| 9506 | BRA | Braathens ASA | IATA: BU, Callsign: Scanor, IATA Prefix: 154, ICAO callsign changed from Braathens. ICAO designator changed to CNO. Formerly Braathens South American and Far East Airtransport A/S | N | AVCODES |
| 9507 | BRA | | City: Brandenburg | D | TRAFFIC |
| 9508 | BRAA | BRASHEAR TRUCKING CO INC | | | SCAC3 |
| 9509 | BRAA | BRUBEX ENTERPRISES INC | | | SCAC4 |
| 9510 | BRACH | Reiner Brach GmbH&Co. KG | | DE | VKM |
| 9511 | BRAD | BRADLEYS EXPRESS INCORPORATED | | | SCAC3 |
| 9512 | BRAD | BRADEN TRUCKING | | | SCAC4 |
| 9513 | BRADCY | Bradford City Transport | | GB | TRAFFIC |
| 9514 | BRADO | Brado Logística | | BR | TRAFFIC |
| 9515 | BRAE | BRANDT, E I | | | SCAC3 |
| 9516 | BRAE | BEL INTERNATIONAL LOGISTICS LTD | | | SCAC4 |
| 9517 | BRAF | BRADNER FARMS | | | SCAC4 |
| 9518 | BRAG | BRAUNS EXPRESS | | | SCAC3 |
| 9519 | BRAH | BRACHT TRANSPORTATION CO | | | SCAC3 |
| 9520 | BRAI | BRAR | | | SCAC4 |
| 9521 | BRAI | S.C.Braicar S.A. | City: Braila | RO | TRAFFIC |
| 9522 | BRAK | BEST RAIDER CARGO EXPRESS LTD | | | SCAC4 |
| 9523 | BRAL | BRAND TRUCKING CO, INC | | | SCAC3 |
| 9524 | BRAL | BRAL CORPORATION | | | SCAC4 |
| 9525 | BRAM | BRADY MOTORFRATE INC | | | PWRC |
| 9526 | BRAM | BRACAMONTE, GARY TRANSPORT SERVICE | | | SCAC3 |
| 9527 | BRAMP | Brampton Transit | | CDN | TRAFFIC |
| 9528 | BRAN | Brandon Railroad, LLC | added 7/2007 | | NAKINA |
| 9529 | BRAN | Brandon Corp. | added 7/1978; 1/1980-7/2005; eliminated 7/2007 | | NAKINA |
| 9530 | BRAN | Brandon Corp. | added 7/78; 1/80-7/2000 | | NRHS |
| 9531 | BRAN | BRANDON RAILROAD, LLC | | | PWRC |
| 9532 | BRAN | Brandon Corporation | | | RSRV |
| 9533 | BRAN | BRANDON CORPORATION | | | SCAC3 |
| 9534 | BRAND | Brandon Transit | | CDN | TRAFFIC |
| 9535 | BRANT | Brantford Transit | | CDN | TRAFFIC |
| 9536 | BRAP | BRODA SEATING | | | SCAC4 |
| 9537 | BRAQ | BAR TRANS INC | | | SCAC4 |
| 9538 | BRAR | BROCK SOLUTIONS INC | | | SCAC4 |
| 9539 | BRAS | BRONCO MOVING & STORAGE INC | | | SCAC3 |
| 9540 | BRAS | Regia Autonomă de Transport Brașov | City: Brașov | RO | TRAFFIC |
| 9541 | BRASA | | | BR | TRAFFIC |
| 9542 | BRAT | BRADFORD TRUCK SERVICE | | | SCAC3 |
| 9543 | BRAT | Brandtford Transit | | CDN | TRAFFIC |
| 9544 | BRAU | BRASTEINER 2000 COMERCIO E LOCACAO | | | SCAC4 |
| 9545 | BRAUN | Emeran Braun Bahnbau und Maschinen GmbH | | DE | VKM |
| 9546 | BRAV | BROCKS AUTO PARTS INC | | | SCAC3 |
| 9547 | BRAV | BROCKS AUTO PARTS INC | | | SCAC4 |
| 9548 | BRAW | BARNHART, WILLIAM TRUCKING CO INC | | | SCAC3 |
| 9549 | BRAX | General American Marks Co. | added 10/2005 | | NAKINA |
| 9550 | BRAX | The CIT Group/Capital Finance, Inc. | added 4/1999; 7/2000-7/2005; eliminated 10/2005 | | NAKINA |
| 9551 | BRAX | General Electric Railcar Services Corp. | added 1/1990; 1/1994; eliminated 4/1999 | | NAKINA |
| 9552 | BRAX | Brae Transportation Inc., a subsidiary of Brae Corp. | added 7/1984; eliminated 1/1990 | | NAKINA |
| 9553 | BRAX | Brae Corp. | 1/1980; added 10/1980; eliminated 7/1984 | | NAKINA |
| 9554 | BRAX | Brae Corp. | 1/80; added 10/80; eliminated 7/84 | | NRHS |
| 9555 | BRAX | Brae Transportation Inc., a subsidiary of Brae Corp. | added 7/84; eliminated 1/90 | | NRHS |
| 9556 | BRAX | General Electric Railcar Services Corp. | added 1/90; 1/94; eliminated 4/99 | | NRHS |
| 9557 | BRAX | The CIT Group/Capital Finance, Inc. | added 4/99; 7/2000 | | NRHS |
| 9558 | BRAX | GENERAL AMERICAN MARKS CO. [BRAE TRANSPORTATION] | | | PWRC |
| 9559 | BRAX | Brae Corporation (CIT Equipment Finance Corporation) | | | RSRV |
| 9560 | BRAX | GENERAL AMERICAN MARKS COMPANY | | | SCAC4 |
| 9561 | BRAY | BRAY TRUCKING & SON | | | SCAC3 |
| 9562 | BRAZ | RETIRED 04-26-94 FXD | | | PWRC |
| 9563 | BRB | BRA Transportes Aeroes Ltda | IATA: 7R, Callsign: Brasair, Founded in 1999. Ceased operations on 07 November 2007. Designator 7R recalled by IATA. | BR | AVCODES |
| 9564 | BRB | BRA-Transportes Aereos | IATA: 7R | | ICAO1 |
| 9565 | BRB | Bayerische Regiobahn GmbH | Augsburg (Veolia Verkehr) | D | privat-bahn.de |
| 9566 | BRB | Bayerische RegioBahn | | D | TRAFFIC |
| 9567 | BRB | Bayerische Regiobahn GmbH | | DE | VKM |
| 9568 | BRBB | BRADBURY BROTHERS | | | SCAC3 |
| 9569 | BRBB | BREAK BULK TRANSPORTATION INC | | | SCAC4 |
| 9570 | BRBC | BRISTOL BAY CONTRACTORS INC | | | SCAC3 |
| 9571 | BRBC | BRISTOL BAY CONTRACTORS INC | | | SCAC4 |
| 9572 | BRBD | BROOKSIDE EQUIPMENT SALES INC | | | SCAC4 |
| 9573 | BRBE | BLACK, ROBERT E | | | SCAC3 |
| 9574 | BRBE | BLACK, ROBERT JR | | | SCAC4 |
| 9575 | BRBF | BATON ROUGE CARGO SERVICE INC | | | SCAC4 |
| 9576 | BRBG | BORDER BEVERAGES INC | | | SCAC3 |
| 9577 | BRBH | BARNETT BROTHERS | | | SCAC3 |
| 9578 | BRBI | BREWTON EXPRESS INC | | | SCAC3 |
| 9579 | BRBJ | BRUGES, R TRANSPORT INC | | | SCAC4 |
| 9580 | BRBL | B R B INTERNATIONAL LIMITED | | | SCAC3 |
| 9581 | BRBN | BLUE RIBBON RELOCATION LLC | | | SCAC4 |
| 9582 | BRBO | BRIDGEWATER BROS | | | SCAC3 |
| 9583 | BRBP | BRINK, BOB, INCORPORATED | | | SCAC3 |
| 9584 | BRBQ | BIG RED BROKERAGE INC | | | SCAC4 |
| 9585 | BRBR | BRADLEY-BURTSCHI | | | SCAC3 |
| 9586 | BRBT | BROWN BROTHERS TRUCK LINE | | | SCAC3 |
| 9587 | BRBT | BLUE RIBBON TRANSPORT INC | | | SCAC4 |
| 9588 | BRBU | NOURYON FUNCTIONAL CHEMICALS | | NL | BIC |
| 9589 | BRBW | B & R CATTLE AND | | | SCAC4 |
| 9590 | BRBX | Bombardier Transportation | 7/2000-7/2005 (not listed) | | NAKINA |
| 9591 | BRBX | Bombardier Transportation | Jul-00 | | NRHS |
| 9592 | BRBX | BOMBARDIER TRANSPORTATION | | | PWRC |
| 9593 | BRBX | Bombardier Transportation | | | RSRV |
| 9594 | BRBX | BOMBARDIER TRANSPORTATION | | | SCAC4 |
| 9595 | BRBY | BOATRIGHT | | | SCAC3 |
| 9596 | BRC | Bringer Air Cargo Taxi Aereo Ltda | IATA: E6, IATA Prefix: 417, ICAO designator changed to BCT. | BR | AVCODES |
| 9597 | BRC | Breeze Aviation | Callsign: Bravi, | BG | AVCODES |
| 9598 | BRC | Belt Ry. Co. of Chicago | 8/1920-7/2005 | | NAKINA |
| 9599 | BRC | Belt Ry. Co. of Chicago | 7/23-7/2000 | | NRHS |
| 9600 | BRC | BELT RAILWAY CO. OF CHICAGO | | | PWRC |
