Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI4UO callsign genealogy
Currently held by MILLER, MICHAEL S
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 AI4UO's current licensee, walking backwards.
- MILLER, MICHAEL SFLgranted 2006-09-07cancelled 2007-03-07
Successor callsigns
Callsigns held now by people who previously held AI4UO.
- MILLER, MICHAEL SVAgranted 2017-01-04