Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7MSY callsign genealogy
Currently held by KOCH, ARTHUR E
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 K7MSY's current licensee, walking backwards.
- Yellin, DaleORgranted 2007-04-23cancelled 2008-03-01
Successor callsigns
Callsigns held now by people who previously held K7MSY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7MSY, oldest first.
- KOCH, ARTHUR E OR1995-03-10 → cancelled 2007-03-13
- Yellin, Dale OR2017-12-09 active