Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4KO callsign genealogy
Currently held by Hires, Jeffrey B
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 KZ4KO'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 KZ4KO.
- Hires, Jeffrey BGAgranted 2024-09-04