Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4BYK callsign genealogy
Currently held by SHINALL, JOHN M
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 K4BYK's current licensee, walking backwards.
- Jarvis, Elizabeth SGAgranted 1998-03-20cancelled 2001-08-03
Successor callsigns
Callsigns held now by people who previously held K4BYK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4BYK, oldest first.
- Jarvis, Elizabeth S GA2022-04-19 active
- SHINALL, JOHN M— → cancelled 1999-02-23