Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC7JJZ callsign genealogy
Currently held by Zamberlan Jr., John J
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 KC7JJZ's current licensee, walking backwards.
- Zamberlan Jr, John JWAgranted 2026-05-13cancelled 2026-07-21
Successor callsigns
Callsigns held now by people who previously held KC7JJZ.
- DUARTE, GARRETT DPAgranted 2017-02-23cancelled 2022-07-08
All historical holders
Every license row we've seen with the callsign KC7JJZ, oldest first.
- DUARTE, GARRETT D PA2017-02-23 → cancelled 2022-07-07
- Zamberlan Jr., John J WA2026-07-21 active