Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4SGL callsign genealogy
Currently held by Lowman, Stephen G
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 N4SGL's current licensee, walking backwards.
- LOWMAN, STEPHEN GFLgranted 2005-04-26cancelled 2007-06-08
Successor callsigns
Callsigns held now by people who previously held N4SGL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4SGL, oldest first.
- LEBAN, JOHN FL1988-03-08 → cancelled 2000-03-09
- Lowman, Stephen G FL2017-06-06 active