Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD9BU callsign genealogy
Currently held by COOK, JAMES W
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 AD9BU's current licensee, walking backwards.
- COOK, JAMES WILgranted 2021-09-07cancelled 2023-02-27
Successor callsigns
Callsigns held now by people who previously held AD9BU.
No current licensee on record previously held this callsign.