Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1TRZ callsign genealogy
Currently held by ZIKO, 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 K1TRZ's current licensee, walking backwards.
- ZIKO, THOMAS RPAgranted 1997-08-29cancelled 2002-12-06
Successor callsigns
Callsigns held now by people who previously held K1TRZ.
- ZIKO, THOMAS RFLgranted 2013-05-03cancelled 2013-08-20