Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6MU callsign genealogy
Currently held by NADAL, JAMES A
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 K6MU's current licensee, walking backwards.
- NADAL, JAMES ACAgranted 2016-11-15cancelled 2019-02-20
Successor callsigns
Callsigns held now by people who previously held K6MU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6MU, oldest first.
- GRINNELL, ALAN M CA2006-12-19 → cancelled 2019-02-12
- NADAL, JAMES A CA2019-02-20 active