Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4JCL callsign genealogy
Currently held by Lambert, 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 K4JCL's current licensee, walking backwards.
- Lambert, John CALgranted 2015-04-08cancelled 2015-06-02
Successor callsigns
Callsigns held now by people who previously held K4JCL.
- LETHCO, JASON CNCgranted 2010-11-23cancelled 2022-11-24
All historical holders
Every license row we've seen with the callsign K4JCL, oldest first.
- LETHCO, JASON C NC2008-12-23 → cancelled 2010-11-23
- Lambert, John C AL2025-03-11 active