Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9JJZ callsign genealogy
Currently held by Zajdel, Jon 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 K9JJZ's current licensee, walking backwards.
- ZAJDEL, JON JNMgranted 2018-05-09cancelled 2020-08-01
Successor callsigns
Callsigns held now by people who previously held K9JJZ.
No current licensee on record previously held this callsign.