Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA9AO callsign genealogy
Currently held by Hirota, Haruhiko
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 AA9AO's current licensee, walking backwards.
- Hirota, HaruhikoFLgranted 2014-12-05cancelled 2015-03-24
Successor callsigns
Callsigns held now by people who previously held AA9AO.
- SEIDL, GREGG JMOgranted 2018-01-31
All historical holders
Every license row we've seen with the callsign AA9AO, oldest first.
- Hirota, Haruhiko FL2025-01-14 active
- —— → cancelled 1998-01-07