| 1 | BTL | Baltia Air Lines, Inc. | Callsign: Baltia Flight, ICAO callsign changed to Baltia. | USA | AVCODES |
| 2 | BTL | Baltia Air Lines, Inc. | Callsign: Baltia, ICAO callsign changed from Baltia Flight. | USA | AVCODES |
| 3 | BTL | Baltia Air Lines | | | ICAO1 |
| 4 | BTLA | BITOLA TRANSPORT LLC | | | SCAC4 |
| 5 | BTLB | BRAMPTON TRANSPORT LIMITED | | | SCAC3 |
| 6 | BTLB | BRIDGER TRANSPORTATION LLC | | | SCAC4 |
| 7 | BTLC | BULLDOG TRUCK LINES INC | | | SCAC3 |
| 8 | BTLE | BLACKBURN TRUCK LINES INC | | | SCAC3 |
| 9 | BTLF | BTL OF ARKANSAS INC | | | SCAC3 |
| 10 | BTLF | BELLA TRANSPORT LLC | | | SCAC4 |
| 11 | BTLG | BATTELINA TRANSPORTATION SYSTEMS IN | | | SCAC3 |
| 12 | BTLG | BATTELINI TRANSPORTATION SYSTEMS IN | | | SCAC4 |
| 13 | BTLH | BER-TON LOGISTICS INC | | | SCAC4 |
| 14 | BTLI | BATLIFF TRUCKING | | | SCAC3 |
| 15 | BTLI | BAILEY TRUCK LINE INC | | | SCAC4 |
| 16 | BTLJ | BILCO TRANSPORTATION LLC | | | SCAC4 |
| 17 | BTLK | BETTER LEASING CORP | | | SCAC3 |
| 18 | BTLL | BUTLER-FLORAL CRAFT INC | | | SCAC3 |
| 19 | BTLL | BESS TANK LINES LTD | | | SCAC4 |
| 20 | BTLM | BOURRET TRANSPORT LIMITEE | | | SCAC3 |
| 21 | BTLM | BOURRET INTERNATIONAL INC | | | SCAC4 |
| 22 | BTLO | BUTLER LUMBER CO | | | SCAC3 |
| 23 | BTLP | BELLEVILLE TRUCK LINE | | | SCAC3 |
| 24 | BTLP | BUTLER TRANSPORT LLC | | | SCAC4 |
| 25 | BTLQ | BARNETT TRUCK LINE INC | | | SCAC3 |
| 26 | BTLR | BALL TRUCK LINE | | | SCAC3 |
| 27 | BTLS | BARBEA TRUCK LEASING INC | | | SCAC3 |
| 28 | BTLS | BUNTE TRUCKING LLC | | | SCAC4 |
| 29 | BTLT | BARTEL TRUCKING | | | SCAC3 |
| 30 | BTLU | BULK TAINER LOGISTICS | | GB | BIC |
| 31 | BTLU | BULWARK TRANSPORT LTD | | | SCAC3 |
| 32 | BTLV | BISON TRUCK LINE INC | | | SCAC3 |
| 33 | BTLV | BIG TRANSPORT LLC | | | SCAC4 |
| 34 | BTLX | W.H. Barber Co. (General American Tank Car Corp.) | 7/1923 | | NAKINA |
| 35 | BTLX | W.H. Barber Co. | 7/1930-4/1961; eliminated 1/1965 | | NAKINA |
| 36 | BTLX | W.H. Barber Agency Co. (General American Tank Car Corp.) | 8/1920 | | NAKINA |
| 37 | BTLX | W.H. Barber Co. | 4/38-4/61; eliminated 1/65 | | NRHS |
| 38 | BTLX | W. H. BARBER CO. | | | PWRC |
| 39 | BTLY | BENTLEYS INC | | | SCAC3 |
| 40 | BTLZ | *BTL SPECIALISTS | | | PWRC |
| 41 | BTLZ | *INTERMODAL SERVICES, INC. | | | PWRC |
| 42 | BTLZ | BTL Specialists (Intermodal Services Inc.) | | | RSRV |
| 43 | BTLZ | INTERMODAL SERVICES, INC. | | | SCAC4 |
