Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AE9OZ callsign genealogy
Currently held by Koester, Michael D
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 AE9OZ's current licensee, walking backwards.
- Koester, Michael DINgranted 2016-12-03cancelled 2020-01-24
Successor callsigns
Callsigns held now by people who previously held AE9OZ.
No current licensee on record previously held this callsign.