Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4RKZ callsign genealogy
Currently held by ZAVETZ, RANDY K
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 K4RKZ's current licensee, walking backwards.
- ZAVETZ, RANDY KSCgranted 2005-12-22cancelled 2012-08-04
Successor callsigns
Callsigns held now by people who previously held K4RKZ.
- ZONGKER, RANDALL KNCgranted 2017-08-03
All historical holders
Every license row we've seen with the callsign K4RKZ, oldest first.
- ZONGKER, RANDALL K NC2006-07-28 → cancelled 2007-10-10
- ZAVETZ, RANDY K SC2022-08-16 active