Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4GZJ callsign genealogy
Currently held by Eckhardt, Troy E
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 KJ4GZJ'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 KJ4GZJ.
- Eckhardt, Troy EFLgranted 2018-08-02