Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AG4OC callsign genealogy
Currently held by YUN, HYONG D
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 AG4OC's current licensee, walking backwards.
- YUN, HYONG DTNgranted 1998-01-20cancelled 2002-02-04
Successor callsigns
Callsigns held now by people who previously held AG4OC.
No current licensee on record previously held this callsign.