Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4UHL callsign genealogy
Currently held by WARREN, GUY W
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 W4UHL's current licensee, walking backwards.
- Duffel Jr, William ETNgranted 2010-04-19cancelled 2010-12-21
Successor callsigns
Callsigns held now by people who previously held W4UHL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4UHL, oldest first.
- WARREN, GUY W FL1997-10-21 → cancelled 2009-10-22
- Duffel Jr, William E TN2020-09-23 active