Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF4ZGM callsign genealogy
Currently held by COGAR, JOHN 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 KF4ZGM's current licensee, walking backwards.
- N8BJIcancelledcancelled 1998-07-08
Successor callsigns
Callsigns held now by people who previously held KF4ZGM.
- COGAR, JOHN DNCgranted 2024-11-26