Confidence: Medium · Source: FCC ULS · As of 2026-09-09
K4THL callsign genealogy
Currently held by Lewis Sr, Thomas 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 K4THL's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4THL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4THL, oldest first.
- GARDNER, RALPH NC1988-03-29 → cancelled 2000-03-30
- Lewis Sr, Thomas H FL2012-07-18 → cancelled 2024-09-18