Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9AAU callsign genealogy
Currently held by ERWOOD, ROBERT C
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 K9AAU's current licensee, walking backwards.
- Bruhn, Larry EILgranted 2015-05-05cancelled 2015-09-15
Successor callsigns
Callsigns held now by people who previously held K9AAU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9AAU, oldest first.
- ERWOOD, ROBERT C IL1996-03-18 → cancelled 2008-03-19
- BRUHN, LARRY E IL2025-07-16 active