Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN4CFU callsign genealogy
Currently held by Speer Sr, Ronnie 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 KN4CFU's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KN4CFU.
- Speer Sr, Ronnie RFLgranted 2018-07-27