Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9USA callsign genealogy
Currently held by IVESDALE RADIO CLUB
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 K9USA's current licensee, walking backwards.
- Baker, Robert LCAgranted 2017-06-05cancelled 2018-11-24
Successor callsigns
Callsigns held now by people who previously held K9USA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9USA, oldest first.
- IVESDALE RADIO CLUB IL2006-08-25 → cancelled 2016-11-04
- Baker, Robert L ID2018-11-24 active