Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4KCX callsign genealogy
Currently held by SMITLEY, ELMER H
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 K4KCX's current licensee, walking backwards.
- LETHCO, JOHN MNCgranted 2009-08-26cancelled 2013-09-21
Successor callsigns
Callsigns held now by people who previously held K4KCX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4KCX, oldest first.
- SMITLEY, ELMER H FL1995-11-28 → cancelled 2007-11-29
- LETHCO, JOHN M NC2023-11-18 active