Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0MAR callsign genealogy
Currently held by Hung, Billy
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 K0MAR's current licensee, walking backwards.
- Hung, BillyOKgranted 2020-03-05cancelled 2020-03-24
Successor callsigns
Callsigns held now by people who previously held K0MAR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0MAR, oldest first.
- THOMPSON, CHARLES W CO2008-02-14 → cancelled 2020-02-27
- Hung, Billy OK2020-03-24 active