Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6UMX callsign genealogy
Currently held by Johnson, Kevin M
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 K6UMX's current licensee, walking backwards.
- Johnson, Kevin MCAgranted 2015-01-06cancelled 2015-03-24
Successor callsigns
Callsigns held now by people who previously held K6UMX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6UMX, oldest first.
- JOHNSON SR, LOUIS D CA2003-06-17 → cancelled 2013-03-28
- Johnson, Kevin M CA2025-04-17 active