Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4TDC callsign genealogy
Currently held by DORSEY, FRED A
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 W4TDC's current licensee, walking backwards.
- AULD, RON WFLgranted 2015-07-03cancelled 2016-03-15
Successor callsigns
Callsigns held now by people who previously held W4TDC.
- DORSEY, FRED ATXgranted 2020-04-10
All historical holders
Every license row we've seen with the callsign W4TDC, oldest first.
- DORSEY, FRED A TX2007-02-09 → cancelled 2010-04-09
- AULD, RON W FL2026-01-24 active