Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4DXU callsign genealogy
Currently held by Shappley, William A
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 K4DXU's current licensee, walking backwards.
- Shappley, William ATNgranted 2003-11-06cancelled 2004-03-02
Successor callsigns
Callsigns held now by people who previously held K4DXU.
No current licensee on record previously held this callsign.