Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4JZP callsign genealogy
Currently held by Piazza, Jason
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 K4JZP's current licensee, walking backwards.
- Piazza, JasonGAgranted 2020-08-05cancelled 2020-08-28
Successor callsigns
Callsigns held now by people who previously held K4JZP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4JZP, oldest first.
- ANDERSON, FRED L PA2004-05-20 → cancelled 2016-03-23
- Piazza, Jason GA2020-08-28 active