Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9BD callsign genealogy
Currently held by Amdahl, Keith A
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 AC9BD's current licensee, walking backwards.
- Amdahl, Keith AWIgranted 2002-03-11cancelled 2012-02-14
Successor callsigns
Callsigns held now by people who previously held AC9BD.
- Amdahl, Keith AWIgranted 2026-05-19