Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5KFF callsign genealogy
Currently held by Fezer, Karl F
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 K5KFF's current licensee, walking backwards.
- Fezer, Karl FWAgranted 2019-11-12cancelled 2019-11-30
Successor callsigns
Callsigns held now by people who previously held K5KFF.
- Fezer, Karl FWAgranted 2020-03-10