Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD9THC callsign genealogy
Currently held by Zimmerman, Timothy S
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 KD9THC's current licensee, walking backwards.
- Zimmerman, Timothy SWIgranted 2010-04-01cancelled 2010-04-23
Successor callsigns
Callsigns held now by people who previously held KD9THC.
No current licensee on record previously held this callsign.