Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY4HM callsign genealogy
Currently held by Zerby, Michael J
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 KY4HM's current licensee, walking backwards.
- Zerby, Michael JNCgranted 2021-03-30cancelled 2021-05-11
Successor callsigns
Callsigns held now by people who previously held KY4HM.
No current licensee on record previously held this callsign.