Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3KSD callsign genealogy
Currently held by Denninger, Karl 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 W3KSD's current licensee, walking backwards.
- Denninger, Karl SFLgranted 2010-07-13cancelled 2010-07-31
Successor callsigns
Callsigns held now by people who previously held W3KSD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3KSD, oldest first.
- DE GIOVANNI SR, JAMES J PA1995-03-16 → cancelled 2007-03-17
- Denninger, Karl S TN2020-05-05 active