Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4HAR callsign genealogy
Currently held by HARMON, JAMES O
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 K4HAR's current licensee, walking backwards.
- HARMON, JAMES OSCgranted 2017-09-18cancelled 2019-02-26
Successor callsigns
Callsigns held now by people who previously held K4HAR.
No current licensee on record previously held this callsign.