Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA1AB callsign genealogy
Currently held by Osuka, Takehiko
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 AA1AB's current licensee, walking backwards.
- Johnson, William DMDgranted 2022-12-24cancelled 2023-02-07
Successor callsigns
Callsigns held now by people who previously held AA1AB.
All historical holders
Every license row we've seen with the callsign AA1AB, oldest first.
- Osuka, Takehiko MP2011-01-28 → cancelled 2020-10-23
- Johnson, William D MD2023-02-07 active