Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0SEM callsign genealogy
Currently held by MOORE, SARAH E
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 K0SEM's current licensee, walking backwards.
- May, MartinCOgranted 2024-03-09cancelled 2024-04-02
Successor callsigns
Callsigns held now by people who previously held K0SEM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0SEM, oldest first.
- MOORE, SARAH E MO1998-11-09 → cancelled 2010-11-10
- May, Martin CO2024-04-02 active