Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1MJG callsign genealogy
Currently held by Giubardo, Mark J
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 W1MJG's current licensee, walking backwards.
- GESER, MICHAEL JMAgranted 2014-07-26cancelled 2023-09-19
Successor callsigns
Callsigns held now by people who previously held W1MJG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1MJG, oldest first.
- Giubardo, Mark J MA2011-04-21 → cancelled 2023-07-12
- GESER, MICHAEL J MA2023-09-19 active