Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6DYC callsign genealogy
Currently held by Chang, Derek
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 K6DYC's current licensee, walking backwards.
- Chang, DerekCAgranted 2026-01-03cancelled 2026-01-27
Successor callsigns
Callsigns held now by people who previously held K6DYC.
- HEMING, RICKNJgranted 2020-05-23
All historical holders
Every license row we've seen with the callsign K6DYC, oldest first.
- HEMING, RICK NJ2020-03-19 → cancelled 2020-05-23
- Chang, Derek CA2026-01-27 active