Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN4FZF callsign genealogy
Currently held by Twilley, Jeffrey W
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 KN4FZF's current licensee, walking backwards.
- Twilley, Jeffrey WALgranted 2010-05-07cancelled 2017-09-21
Successor callsigns
Callsigns held now by people who previously held KN4FZF.
No current licensee on record previously held this callsign.