Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF4SEV callsign genealogy
Currently held by GUTHRIE III, JOHN T
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 KF4SEV's current licensee, walking backwards.
- KF4OBZno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KF4SEV.
- GUTHRIE III, JOHN TALgranted 1997-06-03cancelled 2005-01-07