Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX3O callsign genealogy
Currently held by COOPER, CHARLES E
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 KX3O's current licensee, walking backwards.
- Welch, JasonWAgranted 2017-07-05cancelled 2017-09-19
Successor callsigns
Callsigns held now by people who previously held KX3O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KX3O, oldest first.
- COOPER, CHARLES E PA2005-06-06 → cancelled 2017-08-31
- Welch, Jason WA2017-09-19 active