Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NG3X callsign genealogy
Currently held by SIEBER JR, HARRY F
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 NG3X's current licensee, walking backwards.
- DUDLEY, MARK SMDgranted 2014-01-16cancelled 2014-09-20
- KB3AZWno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held NG3X.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NG3X, oldest first.
- SIEBER JR, HARRY F PA2002-06-12 → cancelled 2014-09-03
- DUDLEY, MARK S TN2024-06-29 active