Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4JTL callsign genealogy
Currently held by Launius, John T
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 KX4JTL's current licensee, walking backwards.
- Launius, John TVAgranted 2022-11-22cancelled 2022-12-10
Successor callsigns
Callsigns held now by people who previously held KX4JTL.
No current licensee on record previously held this callsign.