Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SEM callsign genealogy
Currently held by GORDON, BYRON
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 K4SEM's current licensee, walking backwards.
- STEEN, ANDREWVAgranted 2018-05-15cancelled 2018-06-05
Successor callsigns
Callsigns held now by people who previously held K4SEM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SEM, oldest first.
- GORDON, BYRON GA2004-01-28 → cancelled 2016-04-06
- STEEN, ANDREW VA2018-06-05 active