Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WT0DX callsign genealogy
Currently held by Thomas, William L
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by WT0DX's current licensee, walking backwards.
- THOMAS, WILLIAM LCOgranted 2008-06-24cancelled 2017-11-25
Successor callsigns
Callsigns held now by people who previously held WT0DX.
- W0TDXexpiredTwin City DX AssociationMNgranted 2012-12-13cancelled 2024-08-29
All historical holders
Every license row we've seen with the callsign WT0DX, oldest first.
- Twin City DX Association MN2002-08-06 → cancelled 2002-08-28
- Thomas, William L CO2017-11-25 active