Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ0KOS callsign genealogy
Currently held by Kos, Kelvin
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 KJ0KOS's current licensee, walking backwards.
- Kos, Kelvin JCOgranted 2019-02-19cancelled 2019-07-13
Successor callsigns
Callsigns held now by people who previously held KJ0KOS.
No current licensee on record previously held this callsign.