Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9MWC callsign genealogy
Currently held by CLAUSS, MARK W
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 K9MWC's current licensee, walking backwards.
- CLAUSS, MARK WILgranted 2008-08-05cancelled 2011-09-02
Successor callsigns
Callsigns held now by people who previously held K9MWC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9MWC, oldest first.
- FULWIDER, FRANCES L IN1994-07-14 → cancelled 2006-07-15
- CLAUSS, MARK W IL2021-07-08 active