Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4JBL callsign genealogy
Currently held by lyon, john b
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 K4JBL's current licensee, walking backwards.
- Lyon, John BTNgranted 2016-08-23cancelled 2016-09-13
Successor callsigns
Callsigns held now by people who previously held K4JBL.
- LYONS JR, JOHN WFLgranted 2019-02-19
All historical holders
Every license row we've seen with the callsign K4JBL, oldest first.
- LYONS JR, JOHN W FL1999-02-26 → cancelled 2008-11-04
- lyon, john b TN2016-09-13 active