Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9ZM callsign genealogy
Currently held by Rulf, Howard 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 AC9ZM's current licensee, walking backwards.
- Rulf, Howard FWIgranted 2020-10-27cancelled 2022-01-10
Successor callsigns
Callsigns held now by people who previously held AC9ZM.
No current licensee on record previously held this callsign.