Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5KON callsign genealogy
Currently held by KONTAK, MARVIN D
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 K5KON's current licensee, walking backwards.
- KUZMIN, KONSTANTINTXgranted 2017-12-28cancelled 2018-02-13
Successor callsigns
Callsigns held now by people who previously held K5KON.
All historical holders
Every license row we've seen with the callsign K5KON, oldest first.
- KONTAK, MARVIN D TX2003-02-19 → cancelled 2004-02-10
- KUZMIN, KONSTANTIN TX2018-02-13 → cancelled 2018-05-04