Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NO4DX callsign genealogy
Currently held by Shamblin, David W
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 NO4DX's current licensee, walking backwards.
- David, Shamblin WFLgranted 2015-08-19cancelled 2015-12-26
Successor callsigns
Callsigns held now by people who previously held NO4DX.
No current licensee on record previously held this callsign.