Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI4CSZ callsign genealogy
Currently held by RALPH, WILLIAM R
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 KI4CSZ's current licensee, walking backwards.
- RALPH, WILLIAM RFLgranted 2020-12-03
Successor callsigns
Callsigns held now by people who previously held KI4CSZ.
- RALPH, WILLIAM RFLgranted 2020-12-03