Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4JSD callsign genealogy
Currently held by DUNN, JOHN 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 W4JSD's current licensee, walking backwards.
- DUNN, JOHN Scancelled 1999-05-12
Successor callsigns
Callsigns held now by people who previously held W4JSD.
No current licensee on record previously held this callsign.