Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0KOS callsign genealogy
Currently held by Krykun, Kostiantyn
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 W0KOS's current licensee, walking backwards.
- Krykun, KostiantynCOgranted 2021-03-29cancelled 2025-07-15
Successor callsigns
Callsigns held now by people who previously held W0KOS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0KOS, oldest first.
- HARRISON, NOEL W KS2003-02-26 → cancelled 2015-03-10
- Krykun, Kostiantyn CO2025-07-15 active