Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI4AO callsign genealogy
Currently held by CHAMPION, DONALD R
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 AI4AO's current licensee, walking backwards.
- CHAMPION, DONALD RALgranted 1994-07-15cancelled 2003-07-24
Successor callsigns
Callsigns held now by people who previously held AI4AO.
No current licensee on record previously held this callsign.