Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9TDK callsign genealogy
Currently held by Klimek, Thomas
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 W9TDK's current licensee, walking backwards.
- Klimek, ThomasILgranted 2018-05-10cancelled 2018-05-30
Successor callsigns
Callsigns held now by people who previously held W9TDK.
No current licensee on record previously held this callsign.