Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4WXR callsign genealogy
Currently held by Williams II, Mark 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 KJ4WXR's current licensee, walking backwards.
- Williams II, Mark AGAgranted 2010-02-16cancelled 2010-08-18
Successor callsigns
Callsigns held now by people who previously held KJ4WXR.
No current licensee on record previously held this callsign.