| 1 | BTT | BT-Slavuta | Callsign: Beetee-Slavuta, | UA | AVCODES |
| 2 | BTT | Business Jet Travel Airline Ltd | | UA | AVCODES |
| 3 | BTT | BT-Slavuta | | | ICAO1 |
| 4 | BTT | BIANCO TRAVEL & TOURS INC | | | SCAC4 |
| 5 | BTTA | BRITTAIN TRUCKING CO | | | SCAC3 |
| 6 | BTTB | BASTION TRUCKING | | | SCAC3 |
| 7 | BTTB | BASTION TRUCKING INC | | | SCAC4 |
| 8 | BTTC | BEST TRANSPORTATION CORP | | | SCAC3 |
| 9 | BTTC | BRITTANY TRUCKING CO INC | | | SCAC4 |
| 10 | BTTD | BETTA TRUCKING CO | | | SCAC3 |
| 11 | BTTE | BARNES TRANSPORTATION SERVICES INC | | | SCAC4 |
| 12 | BTTF | BREWTON TRANSFER INC | | | SCAC3 |
| 13 | BTTF | BATTLEFIELD FARMS INC | | | SCAC4 |
| 14 | BTTG | BEST TRUCKING SERVICES INC | | | SCAC3 |
| 15 | BTTG | BERTS TOWING | | | SCAC4 |
| 16 | BTTH | B. T. TRUCKING, INC | | | SCAC3 |
| 17 | BTTH | B T TRUCKING INC | | | SCAC4 |
| 18 | BTTI | BENNETT TRUCK TRANSPORT LLC | | | SCAC4 |
| 19 | BTTJ | BURLNGTON TOURS INC | | | SCAC3 |
| 20 | BTTK | BROTT TRUCKING INC | | | SCAC4 |
| 21 | BTTL | B&T TRUCK LINE, INC | | | SCAC3 |
| 22 | BTTL | BOURGAULT TILLAGE TOOLS | | | SCAC4 |
| 23 | BTTM | BRIDGE TERMINAL TRANSPORT | | | SCAC3 |
| 24 | BTTM | BRIDGE TERMINAL TRANSPORT | | | SCAC4 |
| 25 | BTTN | BRANT TRANSPORTATION | | | SCAC3 |
| 26 | BTTQ | B T T INC | | | SCAC3 |
| 27 | BTTR | BROWN, T TRUCKING | | | SCAC3 |
| 28 | BTTS | BELL, T TRANSPORT INC | | | SCAC4 |
| 29 | BTTT | BETTENCOURT, MAURICE | | | SCAC3 |
| 30 | BTTU | DB CARGO BTT GMBH | | D | BIC |
| 31 | BTTU | BTT BAHNTANK TRANSPORT GMBH | | | SCAC4 |
| 32 | BTTV | BROWN, TROY TRUCKING | | | SCAC3 |
| 33 | BTTW | BULLOCKS TRUCKLAND TOWING | | | SCAC3 |
| 34 | BTTX | TTX Co. | added 1/1992; 1/1994-7/2005 | | NAKINA |
| 35 | BTTX | Trailer Train Co. | added 1/1961; 4/1961-1/1980; eliminated 1/1992 | | NAKINA |
| 36 | BTTX | Trailer Train Co. (not defined) | added 1/1961; 4/1961 | | NAKINA |
| 37 | BTTX | Trailer Train Co. (FCS flat cars equipped with bi-level automobile carrying superstructures furnished by member railroads. Cars are not equipped with hitches and bridge plates) | 4/1963 | | NAKINA |
| 38 | BTTX | Trailer Train Co. (FA flat cars equipped with bi-level automobile carrying superstructures furnished by member railroads. Cars are not equipped with hitches and bridge plates) | 7/1965-10/1968 | | NAKINA |
| 39 | BTTX | Trailer Train Co. (Flat cars, equipped with bi-level auto racks furnished by participant railroads) | 4/1970-7/1985 | | NAKINA |
| 40 | BTTX | Trailer Train Co./TTX Co. (not defined) | 10/1991-1/1992 | | NAKINA |
| 41 | BTTX | TTX Co. (140 ft. intregal articulated bi-level auto rack with end of car cush.) | 7/2000 | | NAKINA |
| 42 | BTTX | Trailer Train Co. | 4/61-7/65 | | NRHS |
| 43 | BTTX | Trailer Train Co. (FA flat cars equipped with bi-level automobile carrying superstructures furnished by member railroads. Cars are not equipped with hitches and bridge plates) | 10/66-10/68 | | NRHS |
| 44 | BTTX | Trailer Train Co. | Apr-70 | | NRHS |
| 45 | BTTX | Trailer Train Co. (Flat cars, equipped with bi-level auto racks furnished by participant railroads) | 1/75-1/80 | | NRHS |
| 46 | BTTX | Trailer Train Co. | eliminated 1/92 | | NRHS |
| 47 | BTTX | TTX Co. | added 1/92 | | NRHS |
| 48 | BTTX | TTX Co. (140 ft. intregal articulated bi-level auto rack with end of car cush.) | Jul-00 | | NRHS |
| 49 | BTTX | TTX COMPANY - TRAILER TRAIN CO. | | | PWRC |
| 50 | BTTX | Trailer Train (TTX Corporation) | | | RSRV |
| 51 | BTTX | TTX COMPANY | | | SCAC4 |
