Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD3FLY callsign genealogy
Currently held by CARLSEN, WILLIAM 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 KD3FLY's current licensee, walking backwards.
- Carlsen, William SPAgranted 2012-04-23cancelled 2012-05-12
Successor callsigns
Callsigns held now by people who previously held KD3FLY.
No current licensee on record previously held this callsign.