Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3DO callsign genealogy
Currently held by Walmsley Jr, George F
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 W3DO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W3DO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3DO, oldest first.
- Walmsley Jr, George F PA2007-01-10 → cancelled 2019-03-28
- BOSAK, GERALD L PA2019-04-23 active