Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4OBX callsign genealogy
Currently held by Borst, James D
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 KO4OBX's current licensee, walking backwards.
- Borst, James DNCgranted 2020-03-02cancelled 2020-05-08
Successor callsigns
Callsigns held now by people who previously held KO4OBX.
No current licensee on record previously held this callsign.