Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4TSD callsign genealogy
Currently held by DENNY, THOMAS 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 K4TSD's current licensee, walking backwards.
- DENNY, THOMAS Scancelled 1999-02-10
Successor callsigns
Callsigns held now by people who previously held K4TSD.
No current licensee on record previously held this callsign.