Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KK4TH callsign genealogy
Currently held by Hartwell, Terry L
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 KK4TH's current licensee, walking backwards.
- Hartwell, Terry LFLgranted 2014-01-31cancelled 2020-08-18
Successor callsigns
Callsigns held now by people who previously held KK4TH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KK4TH, oldest first.
- HOUTLER, WILLIAM J FL1997-10-14 → cancelled 2009-10-15
- Hartwell, Terry L FL2020-08-18 active