Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD7GR callsign genealogy
Currently held by MC GUIRE, DUANE H
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 KD7GR's current licensee, walking backwards.
- MAMANAKIS, DAVIDUTgranted 2014-12-23cancelled 2015-02-18
Successor callsigns
Callsigns held now by people who previously held KD7GR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD7GR, oldest first.
- MC GUIRE, DUANE H WA1988-04-12 → cancelled 2000-04-13
- MAMANAKIS, DAVID UT2025-01-09 active