Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AF9S callsign genealogy
Currently held by Rizzo, Anthony F
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 AF9S's current licensee, walking backwards.
- Rizzo, Anthony FILgranted 2005-03-07cancelled 2007-04-06
Successor callsigns
Callsigns held now by people who previously held AF9S.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AF9S, oldest first.
- KOBERSTEIN, ROBERT C MI1993-10-26 → cancelled 2005-10-27
- Rizzo, Anthony F IL2017-02-07 active