Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0JZZ callsign genealogy
Currently held by ZIMMER, JERROLD F
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 K0JZZ's current licensee, walking backwards.
- Zimmer, Jerrold FCOgranted 2016-09-02cancelled 2016-09-24
Successor callsigns
Callsigns held now by people who previously held K0JZZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0JZZ, oldest first.
- MOELLER, DONALD B NE1988-06-21 → cancelled 2000-06-22
- ZIMMER, JERROLD F CO2026-08-01 active