Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4FJ callsign genealogy
Currently held by HARMON, BARTON L
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 KB4FJ's current licensee, walking backwards.
- HARMON, BARTON LNCgranted 2010-10-22cancelled 2011-03-02
Successor callsigns
Callsigns held now by people who previously held KB4FJ.
- HARMON, BARTON LNCgranted 2010-10-22cancelled 2011-03-02
All historical holders
Every license row we've seen with the callsign KB4FJ, oldest first.
- HARMON, BARTON L NC2005-11-10 → cancelled 2010-10-22
- HARMON, BARTON L NC2020-12-15 active