Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4JG callsign genealogy
Currently held by GUTHRIE, JONATHAN K
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 KF4JG's current licensee, walking backwards.
- GUTHRIE, JONATHAN KTNgranted 2016-12-20cancelled 2026-06-16
Successor callsigns
Callsigns held now by people who previously held KF4JG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF4JG, oldest first.
- Griffiths, John D VA2007-09-11 → cancelled 2019-11-22
- GUTHRIE, JONATHAN K TN2026-06-16 active