Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4ONE callsign genealogy
Currently held by SIMPSON III, LELAND 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 N4ONE's current licensee, walking backwards.
- MATHES, JEREMY BGAgranted 2020-05-18cancelled 2020-06-30
Successor callsigns
Callsigns held now by people who previously held N4ONE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4ONE, oldest first.
- SIMPSON III, LELAND F SC2006-09-08 → cancelled 2018-09-11
- Mathes, Jeremy B GA2020-06-30 active