Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KG4HYZ callsign genealogy
Currently held by LEONHARDT, DAVID Y
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 KG4HYZ's current licensee, walking backwards.
- LEONHARDT, DAVID YFLgranted 1990-08-07cancelled 2000-06-07
Successor callsigns
Callsigns held now by people who previously held KG4HYZ.
- LEONHARDT, DAVID YTXgranted 2010-08-03cancelled 2014-03-29