Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4JKU callsign genealogy
Currently held by CLODFELTER JR, BILLY 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 KB4JKU'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 KB4JKU.
- CLODFELTER JR, BILLY CNCgranted 1999-05-25cancelled 2003-02-19