Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0STZ callsign genealogy
Currently held by MEDINA, RUBEN L
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 K0STZ's current licensee, walking backwards.
- MEDINA, RUBEN LCOgranted 2005-11-01cancelled 2006-02-22
Successor callsigns
Callsigns held now by people who previously held K0STZ.
No current licensee on record previously held this callsign.