Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4MWO callsign genealogy
Currently held by overton-del Castillo, Michael 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 KP4MWO's current licensee, walking backwards.
- overton-del Castillo, Michael WPRgranted 2020-09-09cancelled 2021-11-20
Successor callsigns
Callsigns held now by people who previously held KP4MWO.
No current licensee on record previously held this callsign.