Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4JT callsign genealogy
Currently held by LOZNICKA JR, GEORGE F
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 KO4JT's current licensee, walking backwards.
- Lewis, Jeffrey TFLgranted 2021-08-16cancelled 2021-10-19
Successor callsigns
Callsigns held now by people who previously held KO4JT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KO4JT, oldest first.
- LOZNICKA JR, GEORGE F FL2001-06-28 → cancelled 2013-09-18
- Lewis, Jeffrey T AL2021-10-19 active