Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9CB callsign genealogy
Currently held by Koch, Andrew V
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 AC9CB's current licensee, walking backwards.
- Koch, Andrew VWIgranted 2004-12-08cancelled 2012-04-24
Successor callsigns
Callsigns held now by people who previously held AC9CB.
No current licensee on record previously held this callsign.