Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0DIO callsign genealogy
Currently held by KOLLER, GEORGE A
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 K0DIO's current licensee, walking backwards.
- Andrus, Max ACOgranted 2015-08-27cancelled 2019-11-05
Successor callsigns
Callsigns held now by people who previously held K0DIO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0DIO, oldest first.
- KOLLER, GEORGE A MO1988-12-06 → cancelled 2000-12-07
- Andrus, Cynthia A CO2019-11-05 active