Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KG4OYN callsign genealogy
Currently held by Irwin, Billy L
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 KG4OYN's current licensee, walking backwards.
- Irwin, Billy LSCgranted 2000-12-08cancelled 2001-08-22
Successor callsigns
Callsigns held now by people who previously held KG4OYN.
- Irwin, Billy LSCgranted 2003-03-29cancelled 2011-12-16