Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9GDH callsign genealogy
Currently held by Horodeck, Gregory 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 K9GDH's current licensee, walking backwards.
- Hollon, Gerald DINgranted 2019-04-25cancelled 2019-08-30
Successor callsigns
Callsigns held now by people who previously held K9GDH.
- Horodeck, Gregory DILgranted 2017-08-11
All historical holders
Every license row we've seen with the callsign K9GDH, oldest first.
- Horodeck, Gregory D IL2009-07-14 → cancelled 2017-08-11
- Hollon, Gerald D IN2019-08-30 active