Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K2MOS callsign genealogy
Currently held by UMBACH, CHARLES G
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 K2MOS's current licensee, walking backwards.
- Moscoe, Jay EKYgranted 2016-08-03cancelled 2016-08-26
Successor callsigns
Callsigns held now by people who previously held K2MOS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K2MOS, oldest first.
- UMBACH, CHARLES G NY2004-05-21 → cancelled 2016-05-24
- Moscoe, Jay E KY2016-08-26 active