Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM9J callsign genealogy
Currently held by Door County DX Club
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 KM9J's current licensee, walking backwards.
- Mayfield-jones, Karen LILgranted 2016-04-01cancelled 2020-05-29
Successor callsigns
Callsigns held now by people who previously held KM9J.
- ARMSTRONG, GEORGE RILgranted 2016-08-08
All historical holders
Every license row we've seen with the callsign KM9J, oldest first.
- Door County DX Club WI2008-05-09 → cancelled 2020-05-12
- Mayfield-jones, Karen L IL2020-05-29 active