Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4JMF callsign genealogy
Currently held by FISHER, JOHN M
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 K4JMF's current licensee, walking backwards.
- Fisher, John MNCgranted 2019-01-30cancelled 2019-07-19
Successor callsigns
Callsigns held now by people who previously held K4JMF.
- Mestre, JorgeGAgranted 2011-07-08cancelled 2020-02-18
All historical holders
Every license row we've seen with the callsign K4JMF, oldest first.
- Mestre, Jorge GA2001-05-22 → cancelled 2001-09-18
- FISHER, JOHN M NC2019-07-19 active