Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9BF callsign genealogy
Currently held by Ringwald, Michael G
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 AC9BF's current licensee, walking backwards.
- Ringwald, Michael GINgranted 2011-10-04cancelled 2012-02-15
Successor callsigns
Callsigns held now by people who previously held AC9BF.
No current licensee on record previously held this callsign.