Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WH6DFM callsign genealogy
Currently held by HILLENDAHL, WILLIAM
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 WH6DFM'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 WH6DFM.
- KH6EARactiveHAWAIIAN EMPIRE AMATEUR RADIO SOCIETYHIgranted 2019-03-28