Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4EFX callsign genealogy
Currently held by SEIBERT II, WILLIAM E
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 N4EFX's current licensee, walking backwards.
- SEIBERT II, WILLIAM EGAgranted 2021-06-17cancelled 2021-08-03
Successor callsigns
Callsigns held now by people who previously held N4EFX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4EFX, oldest first.
- MORETON, BRUCE D KY2003-04-04 → cancelled 2015-05-27
- SEIBERT II, WILLIAM E GA2021-08-03 active