| 1 | DEX | Interflight, Inc. | Callsign: Dulles Express, | USA | AVCODES |
| 2 | DEXA | DELTA EXPRESS INC | | | SCAC4 |
| 3 | DEXB | DHL EXPRESS | | | SCAC4 |
| 4 | DEXC | DUNHAM EXPRESS | | | SCAC4 |
| 5 | DEXH | DUNHAM'S EXPRESS | | | SCAC4 |
| 6 | DEXJ | DELFRESCO EXPRESS LTD | | | SCAC4 |
| 7 | DEXK | DEPENDABLE EXPRESS TRUCKING INC | | | SCAC4 |
| 8 | DEXM | DIAMOND EXPEDITED INC | | | SCAC4 |
| 9 | DEXN | DEXP INC | | | SCAC4 |
| 10 | DEXO | DIRECTO EXPRESS | | | SCAC4 |
| 11 | DEXQ | DIAMOND EXPRESS | | | SCAC4 |
| 12 | DEXR | DAKOTAH EXPRESS INC | | | SCAC4 |
| 13 | DEXS | DISCOVERY EXPRESS INC | | | SCAC4 |
| 14 | DEXT | DEXTER CARPENTER COAL CO. | | | PWRC |
| 15 | DEXT | DESERT EXPRESS TRANSPORT LLC | | | SCAC4 |
| 16 | DEXU | DELEXPRESS | | RUS | BIC |
| 17 | DEXU | DEX LTD | | | SCAC4 |
| 18 | DEXV | DESROCHERS EXCAVATING INC | | | SCAC4 |
| 19 | DEXW | DAKOTA EXPRESS | | | SCAC4 |
