Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ZTZ callsign genealogy
Currently held by Gibson, Glenn
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 K4ZTZ's current licensee, walking backwards.
- Gibson, GlennVAgranted 2024-08-20cancelled 2024-09-07
Successor callsigns
Callsigns held now by people who previously held K4ZTZ.
No current licensee on record previously held this callsign.