Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4CO callsign genealogy
Currently held by VIA, JAMES F
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 KJ4CO's current licensee, walking backwards.
- CHANDLER, JOHN EKYgranted 2010-08-13cancelled 2014-12-05
Successor callsigns
Callsigns held now by people who previously held KJ4CO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ4CO, oldest first.
- VIA, JAMES F FL1995-10-24 → cancelled 2007-10-25
- CHANDLER, JOHN E KY2025-11-22 active