Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4AX callsign genealogy
Currently held by HEARN, JOHN W
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 KZ4AX's current licensee, walking backwards.
- HEARN, JOHN WGAgranted 2023-03-28cancelled 2023-09-15
Successor callsigns
Callsigns held now by people who previously held KZ4AX.
No current licensee on record previously held this callsign.