Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5GDG callsign genealogy
Currently held by Chan, Calvin
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 K5GDG's current licensee, walking backwards.
- Chan, CalvinNMgranted 2019-08-22cancelled 2019-09-10
Successor callsigns
Callsigns held now by people who previously held K5GDG.
- GRAY, GREGORY DTXgranted 2016-04-27cancelled 2016-08-02
All historical holders
Every license row we've seen with the callsign K5GDG, oldest first.
- GRAY, GREGORY D TX2004-01-27 → cancelled 2006-06-23
- Chan, Calvin NM2019-09-10 active