Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4AO callsign genealogy
Currently held by Tyon, Bruce M
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 KZ4AO's current licensee, walking backwards.
- Tyon, Bruce MALgranted 2018-04-12cancelled 2023-09-05
Successor callsigns
Callsigns held now by people who previously held KZ4AO.
No current licensee on record previously held this callsign.