Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4JFD callsign genealogy
Currently held by DALLAS, JOHN 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 KZ4JFD's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KZ4JFD.
No current licensee on record previously held this callsign.