Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA0IO callsign genealogy
Currently held by ALLEN, CHARLES 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 AA0IO's current licensee, walking backwards.
- KB0EBIno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held AA0IO.
No current licensee on record previously held this callsign.