Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4KAZ callsign genealogy
Currently held by RUNKLE, FREDERICK S
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 K4KAZ's current licensee, walking backwards.
- LEWIS, JOHN HNCgranted 2003-04-29cancelled 2008-12-30
- KD4SWDno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held K4KAZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4KAZ, oldest first.
- RUNKLE, FREDERICK S GA1997-05-27 → cancelled 2006-12-08
- LEWIS, JOHN H NC2018-10-11 active