Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD9OSC callsign genealogy
Currently held by Leman Middle School STEM Club
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 KD9OSC's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KD9OSC.
- W9EGOactiveLeman Middle School STEM ClubILgranted 2020-02-19