Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9OWS callsign genealogy
Currently held by Mansen P.E, David J
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 KC9OWS's current licensee, walking backwards.
- Mansen P.E, David JILgranted 2022-02-28cancelled 2022-03-19
Successor callsigns
Callsigns held now by people who previously held KC9OWS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC9OWS, oldest first.
- Mansen PE, David J IL2009-01-05 → cancelled 2021-01-06
- Mansen P.E, David J IL2022-03-19 active