Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6MGY callsign genealogy
Currently held by Montoya, Mark D
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 K6MGY's current licensee, walking backwards.
- Montoya, Mark DCAgranted 2007-04-10cancelled 2007-05-01
Successor callsigns
Callsigns held now by people who previously held K6MGY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6MGY, oldest first.
- COSTANTINO, JOHN A CA1994-12-14 → cancelled 2006-12-15
- Montoya, Mark D CO2017-04-03 active