Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9MSF callsign genealogy
Currently held by Frushour, Michael S
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 N9MSF's current licensee, walking backwards.
- Frushour, Michael SILgranted 2017-11-21cancelled 2019-12-28
Successor callsigns
Callsigns held now by people who previously held N9MSF.
- LEHMANN, STEVEN MILgranted 2022-12-01
All historical holders
Every license row we've seen with the callsign N9MSF, oldest first.
- LEHMANN, STEVE M IL2011-06-29 → cancelled 2012-08-21
- Frushour, Michael S IL2019-12-28 active