Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4SDM callsign genealogy
Currently held by Sam Davis Memorial CW Club
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 N4SDM's current licensee, walking backwards.
- KI4DUXcancelledSam Davis Memorial CW ClubTNgranted 2004-01-29cancelled 2004-03-02
Successor callsigns
Callsigns held now by people who previously held N4SDM.
- FERGUSON JR, CARL EGAgranted 2016-08-08