| 1 | TPL | Tar Interpilot | Callsign: Interpilot, | RIM | AVCODES |
| 2 | TPL | Aeropool d/b/a Turbopool Ltd. | Callsign: Aeropool, | GB | AVCODES |
| 3 | TPL | Turbopool Ltd. | Callsign: Aeropool, | GB | AVCODES |
| 4 | TPL | TAR Interpilot | | | ICAO1 |
| 5 | TPL | Texas and Pacific Ry. Co. | 1/1975; eliminated 1/1977 | | NAKINA |
| 6 | TPL | Missouri Pacific R.R. Co. | added 1/1977; 1/1980 | | NAKINA |
| 7 | TPL | Missouri Pacific System | eliminated 1/1981 | | NAKINA |
| 8 | TPL | Texas and Pacific Ry. Co. | 1/75; eliminated 1/77 | | NRHS |
| 9 | TPL | Missouri Pacific R.R. Co. | added 1/77; 1/80 | | NRHS |
| 10 | TPL | Missouri Pacific System | eliminated 1/81 | | NRHS |
| 11 | TPL | MISSOURI PACIFIC SYSTEM [TEXAS & PACIFIC RWY. CO.] | | | PWRC |
| 12 | TPL | Toplivo PLC / Топливо АД | | BG | VKM |
| 13 | TPLC | TWIN PEAKS LOGISTICS LLC | | | SCAC4 |
| 14 | TPLD | TOP LOAD LLC | | | SCAC4 |
| 15 | TPLE | TRIPLE-E MACHINERY MOVING, INC | | | SCAC1 |
| 16 | TPLE | TRIPLE-E MACHINERY MOVING INC | | | SCAC4 |
| 17 | TPLF | TRANSPORTES PASILLAS E HIJOS | | | SCAC4 |
| 18 | TPLG | TRANSPORT LEASING INC | | | SCAC4 |
| 19 | TPLH | TRIPLE L | | | SCAC4 |
| 20 | TPLJ | TRANSPORT LODOS EXPRESS INC | | | SCAC4 |
| 21 | TPLL | THREE (3) PLUS LOGISTICS | | | SCAC4 |
| 22 | TPLM | TRANSPORTES LUMAGO | | | SCAC4 |
| 23 | TPLN | TOP LINE EXPRESS INC | | | SCAC4 |
| 24 | TPLODZ | Tramwaje Podmiejskie | City: Lodz | PL | TRAFFIC |
| 25 | TPLP | TRANSPORTES LEE PINTADO S A DE C V | | | SCAC4 |
| 26 | TPLX | Pacific Lumber Co. | 1/1943-7/1954; eliminated 7/1955 | | NAKINA |
| 27 | TPLX | American Refrigerator Transit Co. | added 1/1963; 7/1965-4/1970; eliminated 10/1974; 1/1975-1/1980 | | NAKINA |
| 28 | TPLX | Pacific Lumber Co. | 1/52; eliminated 7/55 | | NRHS |
| 29 | TPLX | American Refrigerator Transit Co. | 7/65-4/70; eliminated 10/74; 1/75-1/80 | | NRHS |
| 30 | TPLX | *PACIFIC LUMBER CO. | | | PWRC |
| 31 | TPLX | *AMERICAN REFRIGERATOR TRANSIT CO. | | | PWRC |
| 32 | TPLX | Trans-Pacific Lines | | | RSRV |
| 33 | TPLZ | TRANS-PACIFIC LINES | | | SCAC4 |
