Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KR4KZ callsign genealogy
Currently held by GRAY, MICHAEL E
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 KR4KZ's current licensee, walking backwards.
- ZIERS, KIRK AFLgranted 2013-06-22cancelled 2016-03-11
Successor callsigns
Callsigns held now by people who previously held KR4KZ.
- GRAY, MICHAEL EGAgranted 2016-02-23
All historical holders
Every license row we've seen with the callsign KR4KZ, oldest first.
- GRAY, MICHAEL E GA2003-10-31 → cancelled 2006-04-25
- ZIERS, KIRK A FL2026-01-16 active