Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NA3D callsign genealogy
Currently held by DE FREES, EDWARD J
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 NA3D's current licensee, walking backwards.
- Davis, Jerry EDCgranted 2023-08-29cancelled 2025-06-10
Successor callsigns
Callsigns held now by people who previously held NA3D.
- DAVIS, FREDERICK WMDgranted 2003-05-02cancelled 2004-05-18
All historical holders
Every license row we've seen with the callsign NA3D, oldest first.
- DE FREES, EDWARD J PA1996-03-18 → cancelled 1999-10-08
- DAVIS, FREDERICK W MD2003-01-28 → cancelled 2003-05-02
- FILIPKOWSKI, MARK E NJ2016-07-06 → cancelled 2023-05-21
- Davis, Jerry E DC2025-06-10 active