Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC5ZTC callsign genealogy
Currently held by BROWN, DAVID M
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 KC5ZTC's current licensee, walking backwards.
- Buzek, Mark CVAgranted 2017-11-29cancelled 2019-03-23
Successor callsigns
Callsigns held now by people who previously held KC5ZTC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC5ZTC, oldest first.
- BROWN, DAVID M TX1997-04-02 → cancelled 2009-04-03
- Buzek, Mark C VA2019-03-23 active