Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA1US callsign genealogy
Currently held by GRENIER, MICHAEL J
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 AA1US's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AA1US.
- GRENIER, MICHAEL JMEgranted 2006-08-15cancelled 2013-01-29
All historical holders
Every license row we've seen with the callsign AA1US, oldest first.
- GRENIER, MICHAEL J ME1999-03-24 → cancelled 2006-08-15
- GRENIER, MICHAEL J ME2022-12-13 active