Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4ZZV callsign genealogy
Currently held by Grebert, Michael 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 KJ4ZZV's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KJ4ZZV.
- Grebert, Michael JTNgranted 2021-11-27