Confidence: Medium · Source: FCC ULS · As of 2026-09-15
W4TDK callsign genealogy
Currently held by Kallner, Torbjorn 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 W4TDK's current licensee, walking backwards.
- Kallner, Torbjorn DFLgranted 2002-06-11cancelled 2003-12-12
Successor callsigns
Callsigns held now by people who previously held W4TDK.
No current licensee on record previously held this callsign.