Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS0W callsign genealogy
Currently held by Serkes, Keith R
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 KS0W's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KS0W.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KS0W, oldest first.
- COOPER, ARLIS W MO2006-03-07 → cancelled 2018-04-05
- Serkes, Keith R CO2018-04-24 active