Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0JZ callsign genealogy
Currently held by ZIMMERMAN, JAMES A
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 K0JZ's current licensee, walking backwards.
- REYNOLDS JR, CLARENCE JKSgranted 2012-03-13cancelled 2012-06-08
Successor callsigns
Callsigns held now by people who previously held K0JZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0JZ, oldest first.
- ZIMMERMAN, JAMES A IA1996-11-04 → cancelled 1998-07-14
- ZIKE JR, JOHN R CO2000-08-04 → cancelled 2010-05-19
- REYNOLDS JR, CLARENCE J KS2022-07-02 active