Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4JCT callsign genealogy
Currently held by THATCHER, JOHN C
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 K4JCT's current licensee, walking backwards.
- Trice, John CAZgranted 2013-09-17cancelled 2013-10-17
Successor callsigns
Callsigns held now by people who previously held K4JCT.
- Thatcher III, John CTNgranted 2010-03-05cancelled 2014-09-30
All historical holders
Every license row we've seen with the callsign K4JCT, oldest first.
- THATCHER, JOHN C TN1999-04-08 → cancelled 2000-05-02
- Trice, John C AZ2024-12-14 active