Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9GT callsign genealogy
Currently held by COOK, DONALD 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 K9GT's current licensee, walking backwards.
- Mcmahan, Timothy JINgranted 2025-06-24cancelled 2026-08-07
Successor callsigns
Callsigns held now by people who previously held K9GT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9GT, oldest first.
- COOK, DONALD A IN2007-03-30 → cancelled 2019-06-21
- DUNLAP, TED MT2019-07-09 → cancelled 2024-07-18
- Mcmahan, Timothy J IN2026-08-07 active