Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5SMJ callsign genealogy
Currently held by Johnston, Sean 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 K5SMJ's current licensee, walking backwards.
- Johnston, Sean MTXgranted 2014-02-24cancelled 2014-04-04
Successor callsigns
Callsigns held now by people who previously held K5SMJ.
No current licensee on record previously held this callsign.