Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NA4FK callsign genealogy
Currently held by ESTEP, JONATHAN A
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 NA4FK's current licensee, walking backwards.
- ESTEP, JONATHAN ATNgranted 2025-05-01cancelled 2026-08-28
Successor callsigns
Callsigns held now by people who previously held NA4FK.
No current licensee on record previously held this callsign.