Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4XCJ callsign genealogy
Currently held by Jack, James 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 K4XCJ's current licensee, walking backwards.
- Jack, James CFLgranted 2020-09-10cancelled 2020-09-29
Successor callsigns
Callsigns held now by people who previously held K4XCJ.
- Jack, James CFLgranted 2020-12-08