Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX3D callsign genealogy
Currently held by OYLER, WILLIAM W
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 KX3D's current licensee, walking backwards.
- Kroner Jr, Lawrence RPAgranted 2012-10-17cancelled 2017-05-31
Successor callsigns
Callsigns held now by people who previously held KX3D.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KX3D, oldest first.
- OYLER, WILLIAM W PA2005-03-03 → cancelled 2017-05-11
- Kroner Jr, Lawrence R PA2017-05-31 active