Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WS4JP callsign genealogy
Currently held by Pierson, James D
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 WS4JP's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WS4JP.
No current licensee on record previously held this callsign.