Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6KZO callsign genealogy
Currently held by Vargas, Alonso H
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 K6KZO's current licensee, walking backwards.
- Vargas, Alonso HCAgranted 2019-02-14cancelled 2019-04-05
Successor callsigns
Callsigns held now by people who previously held K6KZO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6KZO, oldest first.
- SWANK, CLARENCE J CA1995-09-11 → cancelled 2007-09-12
- Vargas, Alonso H TX2019-04-05 active