Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WH6FDJ callsign genealogy
Currently held by Sumitani, Michael S
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 WH6FDJ's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held WH6FDJ.
- Sumitani, Michael SHIgranted 2016-12-03