Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD8ADU callsign genealogy
Currently held by Holdren, Joe
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 WD8ADU's current licensee, walking backwards.
- Holdren, JoeOHgranted 2021-04-19cancelled 2021-05-11
Successor callsigns
Callsigns held now by people who previously held WD8ADU.
No current licensee on record previously held this callsign.