Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9GLT callsign genealogy
Currently held by Thornell, Garland L
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 KC9GLT's current licensee, walking backwards.
- Thornell, Garland LINgranted 2013-06-03cancelled 2013-07-16
Successor callsigns
Callsigns held now by people who previously held KC9GLT.
- POLSTER, MICHAEL LINgranted 2016-06-28cancelled 2024-02-03
All historical holders
Every license row we've seen with the callsign KC9GLT, oldest first.
- Polster, Michael L IN2004-08-17 → cancelled 2006-06-20
- Thornell, Garland L IN2013-07-16 → cancelled 2025-07-17