Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN4SGL callsign genealogy
Currently held by MACHADO, MARTIN
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 KN4SGL's current licensee, walking backwards.
- MACHADO, MARTINFLgranted 2017-04-11cancelled 2017-04-29
Successor callsigns
Callsigns held now by people who previously held KN4SGL.
No current licensee on record previously held this callsign.