Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4QJ callsign genealogy
Currently held by Sheldon, Donald D
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 KZ4QJ's current licensee, walking backwards.
- Sheldon, Donald DGAgranted 2020-06-15cancelled 2025-02-19
Successor callsigns
Callsigns held now by people who previously held KZ4QJ.
No current licensee on record previously held this callsign.