Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4SIA callsign genealogy
Currently held by Thomas, Scott 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 KO4SIA's current licensee, walking backwards.
- Thomas, Scott MTNgranted 2021-03-19cancelled 2021-08-02
Successor callsigns
Callsigns held now by people who previously held KO4SIA.
- Thomas, Scott MTNgranted 2021-03-19