Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SOI callsign genealogy
Currently held by WERNER, JOHN G
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 K4SOI's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4SOI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SOI, oldest first.
- WERNER, JOHN G FL1997-01-29 → cancelled 2009-01-30
- CHILDRESS, RONALD VA2024-09-07 active