Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0TRZ callsign genealogy
Currently held by Steffl, Thomas R
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 K0TRZ's current licensee, walking backwards.
- Steffl, Thomas RMNgranted 2014-07-02cancelled 2015-05-12
Successor callsigns
Callsigns held now by people who previously held K0TRZ.
No current licensee on record previously held this callsign.