Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1GMM callsign genealogy
Currently held by McKearney, Stephen
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 W1GMM's current licensee, walking backwards.
- McKearney, Stephen MMAgranted 2024-10-29cancelled 2024-11-16
Successor callsigns
Callsigns held now by people who previously held W1GMM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1GMM, oldest first.
- TRUCKENBRODT, ARTHUR C CO2010-04-09 → cancelled 2022-03-15
- McKearney, Stephen MA2024-11-16 active