Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB4SJH callsign genealogy
Currently held by Chapin III, Thomas H
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 WB4SJH's current licensee, walking backwards.
- Chapin III, Thomas HARgranted 2021-03-18cancelled 2021-04-09
Successor callsigns
Callsigns held now by people who previously held WB4SJH.
No current licensee on record previously held this callsign.