Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KO5TER callsign genealogy
Currently held by Koster Jr, Glenn J
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 KO5TER's current licensee, walking backwards.
- Koster Jr, Glenn JTXgranted 2015-08-04cancelled 2015-08-28
Successor callsigns
Callsigns held now by people who previously held KO5TER.
No current licensee on record previously held this callsign.