| 1 | BTC | Bashkir Airlines (BAL) | Callsign: Bashirian, IATA Prefix: 940, Designator V9 recalled by IATA | RUS | AVCODES |
| 2 | BTC | Baltic Flight Academy | Name changed to BFA Airlines | LT | AVCODES |
| 3 | BTC | BFA Airlines | Name changed from Baltic Flight Academy | LT | AVCODES |
| 4 | BTC | BAL Bashkirian Airlines | IATA: V9 | | ICAO1 |
| 5 | BTC | Birmingham Terminal | 1/1994-7/2005 | | NAKINA |
| 6 | BTC | Birmingham Terminal | 1/94-7/2000 | | NRHS |
| 7 | BTC | *BOSTON TERMINAL CO. | | | PWRC |
| 8 | BTC | +BIRMINGHAM TERMINAL CO. | | | PWRC |
| 9 | BTC | Birmingham Terminal | | | RSRV |
| 10 | BTCA | BOATCAN COMPUTER BOAT SALES LIMITED | | | SCAC4 |
| 11 | BTCB | BLATT TRUCKING CO | | | SCAC3 |
| 12 | BTCD | BURR TRANSPORTATION CO INC | | | SCAC3 |
| 13 | BTCE | BULK TRANSPORT CO OF ESSEXVILLE INC | | | SCAC3 |
| 14 | BTCE | BTC EXPRESS INC | | | SCAC4 |
| 15 | BTCG | BEST TRUCKING | | | SCAC3 |
| 16 | BTCH | BAR TRAN CORPORATION | | | SCAC3 |
| 17 | BTCH | Bombardier Transportation (Switzerland) SA | | CH | VKM |
| 18 | BTCI | B T CARTAGE CO | | | SCAC3 |
| 19 | BTCJ | BUCKEYE TRANSPORT CORP | | | SCAC4 |
| 20 | BTCK | BARTON TRUCKING INC | | | SCAC3 |
| 21 | BTCL | BLACK THUNDER TRUCKING INC | | | SCAC4 |
| 22 | BTCM | BROS TRUCKING CO INC | | | SCAC3 |
| 23 | BTCN | BAR-TRAN CO | | | SCAC3 |
| 24 | BTCN | BAR-TRAN CO LLC | | | SCAC4 |
| 25 | BTCO | Boston Terminal Co. | 1/1975-7/2005 | | NAKINA |
| 26 | BTCO | Boston Terminal Co. | 1/75-7/2000 | | NRHS |
| 27 | BTCO | *BREWER & TAYLOR CO. | | | PWRC |
| 28 | BTCO | +BOSTON TERMINAL CO. | | | PWRC |
| 29 | BTCO | Boston Terminal | | | RSRV |
| 30 | BTCO | BRABHAM OIL COMPANY INC | | | SCAC4 |
| 31 | BTCQ | BRADLEY TRUCKING COMPANY | | | SCAC3 |
| 32 | BTCR | BELL TRUCK RENTAL | | | SCAC3 |
| 33 | BTCR | BOLTZO TRANSPORT CORPORATION | | | SCAC4 |
| 34 | BTCS | BALTIC SHIPPING | | | PWRC |
| 35 | BTCS | BAREFOOT TOURS & CHARTER SERVICE | | | SCAC3 |
| 36 | BTCT | BEACH TRANSPORTATION COMPANY | | | SCAC4 |
| 37 | BTCU | BULKMATIC TRANSPORT CO | | | PWRC |
| 38 | BTCU | Bulkmatic Transport | | | RSRV |
| 39 | BTCU | BULKMATIC TRANSPORT CO | | | SCAC3 |
| 40 | BTCU | BULKMATIC TRANSPORT COMPANY | | | SCAC4 |
| 41 | BTCV | BLOOM TRUCKING | | | SCAC3 |
| 42 | BTCV | BYFUGLIEN TRUCKING | | | SCAC4 |
| 43 | BTCX | Browner Turnout Co. | added 1/2007 | | NAKINA |
| 44 | BTCX | Everest Railcar Services, Inc. | added 7/2005; 7/2005; eliminated 1/2007 | | NAKINA |
| 45 | BTCX | Baskerville Transit Corp. | 1/1950 | | NAKINA |
| 46 | BTCX | *BASKERVILLE TRANSIT CORP. | | | PWRC |
| 47 | BTCX | +BROWNER TURNOUT CO. [EVEREST RAILCAR SERVICES, INC.] | | | PWRC |
| 48 | BTCX | BROWNER TURNOUT CO | | | SCAC4 |
| 49 | BTCY | BELLS TRUCKING COMPANY | | | SCAC3 |
| 50 | BTCY | BAILEY TRUCKING COMPANY INC | | | SCAC4 |
| 51 | BTCZ | BULKMATIC TRANSPORT COMPANY | | | PWRC |
| 52 | BTCZ | Bulkmatic Transport | | | RSRV |
| 53 | BTCZ | BULKMATIC TRANSPORT COMPANY | | | SCAC4 |
