Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4SDW callsign genealogy
Currently held by Weissbord, Seth
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 N4SDW's current licensee, walking backwards.
- Weissbord, SethGAgranted 2025-02-12cancelled 2025-03-04
Successor callsigns
Callsigns held now by people who previously held N4SDW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4SDW, oldest first.
- Mulligan Jr, Charles W FL2008-01-10 → cancelled 2020-01-24
- Weissbord, Seth GA2025-03-04 active