Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9ECH callsign genealogy
Currently held by Echelberger, Michael
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 K9ECH's current licensee, walking backwards.
- HALVORSEN, ERICILgranted 2020-06-11cancelled 2020-06-30
Successor callsigns
Callsigns held now by people who previously held K9ECH.
- Echelberger, MichaelCOgranted 2026-06-30
All historical holders
Every license row we've seen with the callsign K9ECH, oldest first.
- Echelberger, Michael CO2016-04-02 → cancelled 2016-06-14
- HALVORSEN, ERIC IL2020-06-30 active