Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KG4OST callsign genealogy
Currently held by Cope, Astra D
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 KG4OST's current licensee, walking backwards.
- Tarpley, Gregory SNCgranted 2015-05-29cancelled 2015-06-16
Successor callsigns
Callsigns held now by people who previously held KG4OST.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KG4OST, oldest first.
- Cope, Astra D TN2001-08-06 → cancelled 2013-08-07
- Tarpley, Gregory S NC2025-04-24 active