Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD9EH callsign genealogy
Currently held by Koehl, Brian R
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 AD9EH's current licensee, walking backwards.
- Koehl, Brian RINgranted 2024-02-06cancelled 2024-04-09
Successor callsigns
Callsigns held now by people who previously held AD9EH.
No current licensee on record previously held this callsign.