Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0EFX callsign genealogy
Currently held by Shoupe, Michael
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 N0EFX's current licensee, walking backwards.
- Shoupe, MichaelFLgranted 2024-02-13cancelled 2024-03-02
Successor callsigns
Callsigns held now by people who previously held N0EFX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0EFX, oldest first.
- Quackenbush, Russell E CA2008-09-22 → cancelled 2020-12-03
- Shoupe, Michael FL2024-03-02 active