Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4OQO callsign genealogy
Currently held by THOMSON, DOUGLAS K
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 KB4OQO's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KB4OQO.
- THOMSON, DOUGLAS KNCgranted 2021-08-03