Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3FO callsign genealogy
Currently held by Smith, David 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 N3FO's current licensee, walking backwards.
- DelMargio, John DPAgranted 2022-11-16cancelled 2023-01-04
Successor callsigns
Callsigns held now by people who previously held N3FO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3FO, oldest first.
- Smith, David F TX2010-10-07 → cancelled 2022-11-01
- DelMargio, John D PA2023-01-04 active