Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4KMF callsign genealogy
Currently held by MATTHEWS, MARION
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 K4KMF's current licensee, walking backwards.
- Fennell, Kevin MVAgranted 2012-02-23cancelled 2012-03-13
Successor callsigns
Callsigns held now by people who previously held K4KMF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4KMF, oldest first.
- MATTHEWS, MARION CA1998-04-08 → cancelled 2010-04-09
- Fennell, Kevin M OK2023-02-02 active