Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7DRK callsign genealogy
Currently held by Masuda, Derek T
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 W7DRK's current licensee, walking backwards.
- Masuda, Derek TORgranted 2019-10-30cancelled 2020-04-07
Successor callsigns
Callsigns held now by people who previously held W7DRK.
No current licensee on record previously held this callsign.