Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA4THK callsign genealogy
Currently held by Chapple, 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 WA4THK's current licensee, walking backwards.
- Chapple, John MVAgranted 2020-06-19cancelled 2020-07-10
Successor callsigns
Callsigns held now by people who previously held WA4THK.
No current licensee on record previously held this callsign.