| 1 | BST | Besit Srl | Callsign: Besit, Name changed from Societa' Besit Srl | I | AVCODES |
| 2 | BST | Sicieta' Besit Srl | Callsign: Besit, Name changed to Besit Srl | I | AVCODES |
| 3 | BST | Best Airlines, Inc. | Callsign: Bestway, | USA | AVCODES |
| 4 | BST | Tunca Havacilik A.S. Bestair | IATA: 5F, Callsign: Barbie, IATA Prefix: 759, Ceased operations in October 2009. Started operations on 17 June 2006. | TR | AVCODES |
| 5 | BST | Best Air | | | ICAO1 |
| 6 | BST | *BI-STATE TRANSIT - "METROLINK" | | | PWRC |
| 7 | BST | *BAYSHORE TERMINAL RWY | | | PWRC |
| 8 | BST | Bi-State Transit (MetroLink) | | | RSRV |
| 9 | BSTAR | Blue Star Line Ltd. (1920) | | GB | TRAFFIC |
| 10 | BSTB | BRUSCO TUG & BARGE INC | | | SCAC4 |
| 11 | BSTC | BEAVER STREET TOWER CO. | | | PWRC |
| 12 | BSTC | BAL, S TRUCKING SERVICES LTD | | | SCAC3 |
| 13 | BSTD | BEST DELIVERY SERVICE INC | | | SCAC3 |
| 14 | BSTE | B & S TIRE SERVICE | | | SCAC4 |
| 15 | BSTF | BESTWAY TRANSFER & STORAGE INC | | | SCAC4 |
| 16 | BSTG | BEST, ELLIOTT TRUCKING | | | SCAC4 |
| 17 | BSTI | BESTLINE TRANSFER INC | | | SCAC3 |
| 18 | BSTJ | B & S TRUCKING | | | SCAC3 |
| 19 | BSTJ | BASSET TRANSPORT LLC | | | SCAC4 |
| 20 | BSTK | BOSTON TRUCK CO, INC | | | SCAC3 |
| 21 | BSTK | B STREET TRUCKING | | | SCAC4 |
| 22 | BSTL | BLUE SPRINGS TRUCK LINE | | | SCAC3 |
| 23 | BSTL | BULK SOLUTIONS TRANSPORTATION GROUP | | | SCAC4 |
| 24 | BSTM | BEST MOVING & STORAGE CO | | | SCAC3 |
| 25 | BSTN | BASTIAN TRUCK SERVICE | | | SCAC3 |
| 26 | BSTO | BEST TRUCKING COMPANY INC | | | SCAC3 |
| 27 | BSTQ | BESTWAY DISPOSAL CO | | | SCAC3 |
| 28 | BSTR | BLACK STAR TRANSPORTATION GROUP LLC | | | SCAC4 |
| 29 | BSTR | Becker-Strelitz Reisen GmbH | | D | TRAFFIC |
| 30 | BSTS | BRONSTEATTER & SONS INC | | | SCAC4 |
| 31 | BSTT | BRANSON SHUTTLE & TOUR INC | | | SCAC4 |
| 32 | BSTU | BEST CONTAINERS | | NL | BIC |
| 33 | BSTU | BEST CONTAINERS | | | SCAC4 |
| 34 | BSTW | BARSTOW TRANSFER & STORAGE CO INC | | | SCAC4 |
| 35 | BSTX | Trinitas Corp. | added 1/1980; 1/1980-1/1994; eliminated 1/1995; 7/2000-7/2005 (not listed) | | NAKINA |
| 36 | BSTX | Trinitas Corp. | added 1/80; 1/80-1/94; eliminated 1/95; 7/2000 | | NRHS |
| 37 | BSTX | *BUDWEISER SKI TRAIN | | | PWRC |
| 38 | BSTX | +TRINITAS CORPORATION (BAY STATE MILLING CO. - LESSEE) | | | PWRC |
| 39 | BSTX | Bay State Milling (Trinitas Corporation) | | | RSRV |
| 40 | BSTX | TRINITAS CORPORATION | | | SCAC4 |
| 41 | BSTY | BAR S TRUCKING | | | SCAC3 |
