Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7KDT callsign genealogy
Currently held by THUNBORG, KAREN
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 W7KDT's current licensee, walking backwards.
- THUNBORG, KARENUTgranted 2012-07-20cancelled 2016-04-08
Successor callsigns
Callsigns held now by people who previously held W7KDT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7KDT, oldest first.
- PARRISH, MARION L AZ1994-07-15 → cancelled 2006-07-18
- THUNBORG, KAREN AZ2026-02-28 active