Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5FZH callsign genealogy
Currently held by Esparza III, Guillermo 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 K5FZH's current licensee, walking backwards.
- Esparza III, Guillermo CTXgranted 2010-07-09cancelled 2010-08-17
Successor callsigns
Callsigns held now by people who previously held K5FZH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5FZH, oldest first.
- BARNES, JOE S TX1998-06-16 → cancelled 2010-06-17
- Esparza III, Guillermo C TX2020-07-02 active