Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA0YO callsign genealogy
Currently held by RICHEY, GRANT M
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 AA0YO's current licensee, walking backwards.
- RICHEY, GRANT MMOgranted 2013-10-21cancelled 2015-05-15
Successor callsigns
Callsigns held now by people who previously held AA0YO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA0YO, oldest first.
- RICHEY, GRANT M CO1995-07-07 → cancelled 2006-10-07
- RICHEY, GRANT M MO2015-05-15 active