Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4SXE callsign genealogy
Currently held by SPARLING, JOHN B
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 N4SXE's current licensee, walking backwards.
- Genick, Tom MFLgranted 2022-01-25
Successor callsigns
Callsigns held now by people who previously held N4SXE.
- Genick, Tom MFLgranted 2022-01-25
All historical holders
Every license row we've seen with the callsign N4SXE, oldest first.
- SPARLING, JOHN B FL1988-05-17 → cancelled 2000-05-18
- Genick, Tom M FL2016-04-26 → cancelled 2022-01-25