| 1 | ETW | Eagle Trans Asia Airways Corp. | Callsign: Eagle Trans, | RP | AVCODES |
| 2 | ETW | EAST TENNESSEE & WESTERN NORTH CAROLINA RAILROAD (TWEETSIE) | | | PWRC |
| 3 | ETWH | EMPIRE TERMINAL WAREHOUSE | | | SCAC3 |
| 4 | ETWI | EVERGREEN TRUCKING & WAREHOUSE CO I | | | SCAC3 |
| 5 | ETWI | EVERGREEN TRUCKING & WAREHOUSE CO I | | | SCAC4 |
| 6 | ETWN | East Tennessee and Western North Carolina R.R. Co. | 1/1975-1/1980; eliminated 1/1984 | | NAKINA |
| 7 | ETWN | East Tennessee and Western North Carolina R.R. Co. | 1/75-1/80 | | NRHS |
| 8 | ETWN | EAST TENNESSEE & WESTERN NORTH CAROLINA RAILROAD (TWEETSIE) | | | PWRC |
| 9 | ETWN | E-TOWN EXPRESS | | | SCAC4 |
| 10 | ETWQ | ELLINGTON TRANSFER & WAREHOUSE COMP | | | SCAC3 |
| 11 | ETWQ | EAGLE TOWING EQUIPMENT LTD | | | SCAC4 |
| 12 | ETWT | EAST-WEST TRUCKING INC | | | SCAC3 |
| 13 | ETWV | E-TOWN MOVING AND STORAGE INC | | | SCAC4 |
| 14 | ETWW | EAST TENNESSEE & WESTERN NORTH CAROLINA RAILROAD (TWEETSIE) | | | PWRC |
