Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SYO callsign genealogy
Currently held by BRAUN, LOUIS L
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 K4SYO's current licensee, walking backwards.
- BRAUN, LOGANTNgranted 2025-02-25cancelled 2025-03-15
Successor callsigns
Callsigns held now by people who previously held K4SYO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SYO, oldest first.
- BRAUN, LOUIS L FL2004-04-02 → cancelled 2016-05-11
- BRAUN, LOGAN TN2025-03-15 active