Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4JFN callsign genealogy
Currently held by Nardolillo, Joseph 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 K4JFN's current licensee, walking backwards.
- Nardolillo, Joseph FFLgranted 2015-07-01cancelled 2019-12-10
Successor callsigns
Callsigns held now by people who previously held K4JFN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4JFN, oldest first.
- COX, MAURICE E NC1995-04-22 → cancelled 2002-03-07
- Nardolillo, Joseph F FL2019-12-10 active