Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4JPY callsign genealogy
Currently held by Youngblood III, John P
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 K4JPY's current licensee, walking backwards.
- Youngblood III, John PSCgranted 2011-08-18cancelled 2012-03-27
Successor callsigns
Callsigns held now by people who previously held K4JPY.
No current licensee on record previously held this callsign.