Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB9TO callsign genealogy
Currently held by ARMSTRONG, DEAN 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 AB9TO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AB9TO.
No current licensee on record previously held this callsign.