Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO0I callsign genealogy
Currently held by CHOUINARD, DAVID E
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 KO0I's current licensee, walking backwards.
- HARRINGTON, PATRICK JCOgranted 2012-07-05cancelled 2017-02-28
Successor callsigns
Callsigns held now by people who previously held KO0I.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KO0I, oldest first.
- CHOUINARD, DAVID E MA2004-11-12 → cancelled 2017-02-10
- HARRINGTON, AMBER P CO2017-02-28 active