Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4SEX callsign genealogy
Currently held by CRUDER, MARK A
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 N4SEX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N4SEX.
No current licensee on record previously held this callsign.