| 1 | BRI | Air Bor | Callsign: Air Bor, | F | AVCODES |
| 2 | BRI | Barrick | Callsign: Barrick, | RCH | AVCODES |
| 3 | BRI | Burlington-Rock Island R.R. | 1/1941-7/1954 | | NAKINA |
| 4 | BRI | Burlington-Rock Island R.R. | Jan-52 | | NRHS |
| 5 | BRI | BURLINGTON-ROCK ISLAND RAILROAD | | | PWRC |
| 6 | BRIA | BRIDGES BROS | | | SCAC3 |
| 7 | BRIB | BARIA TRUCKING INC | | | SCAC3 |
| 8 | BRIBB | Brighton Blue Bus Company | | GB | TRAFFIC |
| 9 | BRIC | BRICK DELIVERY COMPANY | | | SCAC3 |
| 10 | BRIC | BEC TRANSPORTATION INC | | | SCAC4 |
| 11 | BRID | BRITTON, ELMO D | | | SCAC3 |
| 12 | BRID | BRIDGES OIL CO INC | | | SCAC4 |
| 13 | BRIE | Werner Briesemeister GmbH & Co. KG | | DE | VKM |
| 14 | BRIF | BRINDLE LEDGE FARMS INC | | | SCAC3 |
| 15 | BRIF | BURKHALTER RIGGING INC | | | SCAC4 |
| 16 | BRIG | BRIGGS TRANSPORTATION CO | | | PWRC |
| 17 | BRIG | BRIG SHIPPING LTDS | | | SCAC4 |
| 18 | BRIG | | City: Brighton | GB | TRAFFIC |
| 19 | BRIH | BRIGHT BELT MOTOR LINES INC | | | SCAC3 |
| 20 | BRIHD | Brighton Hove & District | | GB | TRAFFIC |
| 21 | BRIHO | Brighton & Hove | Brighton & Hove was established in 1884 as Brighton, Hove and Preston United Omnibus Company. In November 1935 it was formed as the Brighton Hove and District Omnibus Company.[1] In January 1969 it merged with Southdown Motor Services as a subsidiary of the National Bus Company. In January 1985 in preparation for privatisation, Brighton & Hove was separated from Southdown. In May 1987 it was sold in a management buyout. In November 1993 Brighton & Hove was sold to the Go-Ahead Group. | GB | TRAFFIC |
| 22 | BRIJ | BRIGHT-KLEVAN CO | | | SCAC3 |
| 23 | BRIJ | BRIJENCO | | | SCAC4 |
| 24 | BRIL | BRANDT TRUCK LINE, INC | | | SCAC3 |
| 25 | BRIO | Brio wooden toy trains | | TOY | TRAFFIC |
| 26 | BRIP | BARKER, RON INC | | | SCAC3 |
| 27 | BRIQ | BRIGHTWELL, T, AND SONS | | | SCAC3 |
| 28 | BRIQ | BRIGGS, T A & SONS INC | | | SCAC4 |
| 29 | BRIR | BORIS TRANSPORTATION INC | | | SCAC4 |
| 30 | BRIS | BRAINERD RECREATIONAL SUPPLY INC | | | SCAC3 |
| 31 | BRIS | BRAINERD RECREATIONAL SUPPLY INC | | | SCAC4 |
| 32 | BRIT | B-RIGHT TRUCKING CO | | | SCAC3 |
| 33 | BRIT | B-RIGHT TRUCKING CO | | | SCAC4 |
| 34 | BRIU | BRITTANY LEASING, INC. | | | SCAC3 |
| 35 | BRIU | BRITTANY LEASING, INC. | | | SCAC4 |
| 36 | BRIV | BLACK RIVER EQUIPMENT | | | SCAC4 |
| 37 | BRIX | Union Tank Car Co. | 7/2005 | | NAKINA |
| 38 | BRIX | Incobrase Industries, Ltd. | added 4/1997; 7/2000; eliminated 1/2002 | | NAKINA |
| 39 | BRIX | Blue Rock, Inc. | added 4/1960; 4/1961; eliminated 1/1964 | | NAKINA |
| 40 | BRIX | Blue Rock, Inc. | Apr-61 | | NRHS |
| 41 | BRIX | Incobrase Industries, Ltd. | added 4/97; 7/2000 | | NRHS |
| 42 | BRIX | *BLUE ROCK, INC. | | | PWRC |
| 43 | BRIX | *INCOBRASE INDUSTRIES LIMITED | | | PWRC |
| 44 | BRIX | +UNION TANK CAR CO. | | | PWRC |
| 45 | BRIX | Incobrasa Industries (Union Tank Car) | | | RSRV |
| 46 | BRIX | UNION TANK CAR COMPANY | | | SCAC4 |
| 47 | BRIX | Incobrasa Industries Ltd. | | USA | TRAFFIC |
| 48 | BRIY | BRINK, CLARK | | | SCAC3 |
| 49 | BRIY | BARGENQUAST, ROBERT INC | | | SCAC4 |
