Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4ES callsign genealogy
Currently held by SMITHSON, JAMES C
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 KZ4ES's current licensee, walking backwards.
- SMITHSON, JAMES CNCgranted 2021-05-10cancelled 2024-03-04
Successor callsigns
Callsigns held now by people who previously held KZ4ES.
No current licensee on record previously held this callsign.