Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4HI callsign genealogy
Currently held by RUFF, DAVID C
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 KZ4HI's current licensee, walking backwards.
- RUFF, DAVID CALgranted 2024-03-05cancelled 2024-05-06
Successor callsigns
Callsigns held now by people who previously held KZ4HI.
No current licensee on record previously held this callsign.