Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7MDX callsign genealogy
Currently held by SMOTHERS, LEO
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 K7MDX's current licensee, walking backwards.
- MacDonald, Nathan RWAgranted 2015-02-23cancelled 2016-05-10
Successor callsigns
Callsigns held now by people who previously held K7MDX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7MDX, oldest first.
- SMOTHERS, LEO OR2003-07-02 → cancelled 2015-07-03
- MacDonald, Nathan R WA2026-03-24 active