Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4JBK callsign genealogy
Currently held by Kelso, 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 K4JBK's current licensee, walking backwards.
- Kelso, John BGAgranted 2022-10-12cancelled 2022-11-01
Successor callsigns
Callsigns held now by people who previously held K4JBK.
No current licensee on record previously held this callsign.