Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC8COS callsign genealogy
Currently held by Feek, John C
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 KC8COS's current licensee, walking backwards.
- Stewart, Christopher OWVgranted 2025-11-25cancelled 2026-01-09
Successor callsigns
Callsigns held now by people who previously held KC8COS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC8COS, oldest first.
- Feek, John C MI2006-01-30 → cancelled 2018-03-02
- Stewart, Christopher O WV2026-01-09 active