Confidence: Medium · Source: FCC ULS · As of 2026-09-11
N4JS callsign genealogy
Currently held by SIMMONS, JOHN 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 N4JS's current licensee, walking backwards.
- SWOFFORD, JOHN WFLgranted 2018-03-06cancelled 2024-09-17
Successor callsigns
Callsigns held now by people who previously held N4JS.
- SIELKE, JOHN LNJgranted 2020-10-13
All historical holders
Every license row we've seen with the callsign N4JS, oldest first.
- SIELKE, JOHN L NJ1996-05-13 → cancelled 2000-08-08
- SIMMONS, JOHN E NC2012-05-31 → cancelled 2024-08-29
- SWOFFORD, JOHN W FL2024-09-17 active