Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4THC callsign genealogy
Currently held by JOHNSON, ROBERT H
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 K4THC's current licensee, walking backwards.
- Pierce, Howard EFLgranted 2020-08-04cancelled 2021-07-09
Successor callsigns
Callsigns held now by people who previously held K4THC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4THC, oldest first.
- JOHNSON, ROBERT H TN2006-04-01 → cancelled 2018-04-03
- Pierce, Howard E FL2021-07-09 active