Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9POT callsign genealogy
Currently held by SIMKUS, JOHN 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 K9POT's current licensee, walking backwards.
- O Brien, James TGAgranted 2020-01-22cancelled 2020-02-11
Successor callsigns
Callsigns held now by people who previously held K9POT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9POT, oldest first.
- SIMKUS, JOHN A IN1988-01-19 → cancelled 2000-01-20
- OBrien, James T GA2020-02-11 active