Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4IZT callsign genealogy
Currently held by TRI COUNTY AMATEUR RADIO SOCIETY
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 K4IZT's current licensee, walking backwards.
- BLISS, JOHN RFLgranted 2006-01-31cancelled 2015-09-29
Successor callsigns
Callsigns held now by people who previously held K4IZT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4IZT, oldest first.
- TRI COUNTY AMATEUR RADIO SOCIETY GA1999-07-09 → cancelled 2011-07-12
- BLISS, JOHN R FL2025-07-30 active