Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4ZXX callsign genealogy
Currently held by Stewart, Jeffrey B
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 K4ZXX's current licensee, walking backwards.
- Stewart, Jeffrey BNCgranted 2020-03-16cancelled 2020-04-10
Successor callsigns
Callsigns held now by people who previously held K4ZXX.
No current licensee on record previously held this callsign.