Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4TDX callsign genealogy
Currently held by Richards, William 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 N4TDX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N4TDX.
- Richards, William SNCgranted 2004-04-02cancelled 2016-04-05
All historical holders
Every license row we've seen with the callsign N4TDX, oldest first.
- Richards, William S NC2004-01-06 → cancelled 2004-04-02
- Amateur Radio Emergency Services Of Brevard FL2017-04-25 active