Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4SMX callsign genealogy
Currently held by Henderson Jr, John H
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 N4SMX's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held N4SMX.
- Henderson Jr, John HFLgranted 2002-08-13cancelled 2006-08-25