Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB9U callsign genealogy
Currently held by WARREN, WILLIAM E
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 AB9U's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AB9U.
No current licensee on record previously held this callsign.