Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4SWX callsign genealogy
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 KD4SWX's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KD4SWX.
- BUTTS, DONALD JSCgranted 1998-10-29cancelled 2000-06-03