Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0COO callsign genealogy
Currently held by THREADGILL SR, ALSON R
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 K0COO's current licensee, walking backwards.
- DUPLANTIS JR, TERRY PCOgranted 2020-01-07cancelled 2020-02-08
Successor callsigns
Callsigns held now by people who previously held K0COO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0COO, oldest first.
- THREADGILL SR, ALSON R CO1995-05-05 → cancelled 2007-05-08
- Duplantis Jr, Terry P CO2020-02-08 active