Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KV4UJ callsign genealogy
Currently held by EARNHARDT, WILLIAM 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 KV4UJ'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 KV4UJ.
- EARNHARDT, WILLIAM CNCgranted 2014-02-11cancelled 2026-03-07