Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K2GSM callsign genealogy
Currently held by TREBLE, JAMES R
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 K2GSM's current licensee, walking backwards.
- Rublowsky, CarmineNYgranted 2007-12-20cancelled 2017-08-12
Successor callsigns
Callsigns held now by people who previously held K2GSM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K2GSM, oldest first.
- TREBLE, JAMES R NY1995-04-12 → cancelled 2007-04-13
- Rublowsky, Carmine NY2017-08-12 active