Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA1RJ callsign genealogy
Currently held by ISHIGURO, OSAMU
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 AA1RJ's current licensee, walking backwards.
- RICHEME, JEAN BCTgranted 2026-02-20
Successor callsigns
Callsigns held now by people who previously held AA1RJ.
- RICHEME, JEAN BCTgranted 2026-02-20
All historical holders
Every license row we've seen with the callsign AA1RJ, oldest first.
- ISHIGURO, OSAMU MA1996-12-30 → cancelled 2008-01-15
- RICHEME, JEAN B CT2011-09-10 → cancelled 2016-02-23