Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4KG callsign genealogy
Currently held by FONGHEISER, DAVID P
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 KO4KG's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KO4KG.
- FONGHEISER, DAVID PSCgranted 2006-05-31cancelled 2009-01-21
All historical holders
Every license row we've seen with the callsign KO4KG, oldest first.
- FONGHEISER, DAVID P SC2003-02-19 → cancelled 2006-05-31
- FONGHEISER, DAVID P SC2018-10-24 active