| 1 | BRX | Buffalo Express Airlines, Inc. | Callsign: Buff Express, | USA | AVCODES |
| 2 | BRX | Braathens Regional Airways AB | IATA: DC, Callsign: Braathens, IATA designator changed to TF after merger with Braathens Regional Aviation AB on 18 March 2020. | S | AVCODES |
| 3 | BRX | Braathens Regional Airways AB | IATA: TF, Callsign: Braathens, IATA designator changed from DC after merger with Braathens Regional Aviation AB on 18 March 2020. | S | AVCODES |
| 4 | BRX | Buffalo Express Airlines | | | ICAO1 |
| 5 | BRX | Barium Reduction Corp. | 1/1950-10/1957; eliminated 10/1959 | | NAKINA |
| 6 | BRX | Barium Reduction Corp. | 1/52-10/57; eliminated 10/59 | | NRHS |
| 7 | BRX | BARIUM REDUCTION CORP. | | | PWRC |
| 8 | BRXC | BRAUNSTEIN EXPRESS CO INC | | | SCAC3 |
| 9 | BRXD | BARCO REFRIGERATED EXPRESS | | | SCAC3 |
| 10 | BRXE | BROOKLYN EXPRESS CO | | | SCAC3 |
| 11 | BRXF | BROTHERS EXPRESS INC | | | SCAC3 |
| 12 | BRXF | BROTHERS EXPRESS INC | | | SCAC4 |
| 13 | BRXG | BRAX GULF XPRESS | | | SCAC3 |
| 14 | BRXH | BROKER RIVER EXPRESS INC | | | SCAC3 |
| 15 | BRXI | BRITTAIN EXCAVATING | | | SCAC3 |
| 16 | BRXJ | BARRIE TRANSPORT | | | SCAC4 |
| 17 | BRXL | BRASTONE EXPRESS LLC | | | SCAC4 |
| 18 | BRXM | BROXSON MOVING & STORAGE COMPANY | | | SCAC3 |
| 19 | BRXN | BURLESON EXPRESS INC | | | SCAC4 |
| 20 | BRXO | BROWN, J W TRKG | | | SCAC3 |
| 21 | BRXO | BEARTRAXACTIONS | | | SCAC4 |
| 22 | BRXP | BRITE MOTOR EXPRESS, INC | | | SCAC3 |
| 23 | BRXP | B R A R | | | SCAC4 |
| 24 | BRXQ | BRICKLEYS EXPRESS INC | | | SCAC3 |
| 25 | BRXQ | BRAR EXPRESS | | | SCAC4 |
| 26 | BRXR | BEAVER EXPRESS INC | | | SCAC3 |
| 27 | BRXR | BEAVEX INC | | | SCAC4 |
| 28 | BRXS | BRAUNS EXPRESS INC | | | SCAC3 |
| 29 | BRXT | BROTHERS EXPRESS INC | | | SCAC4 |
| 30 | BRXU | BOXRENT LTD | | | SCAC3 |
| 31 | BRXV | B & R ECKELS TRANSPORT | | | SCAC4 |
| 32 | BRXW | BROXWOOD HOLDINGS INC | | | SCAC3 |
