Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4SA callsign genealogy
Currently held by VASILOPOULOS, KONSTADINOS 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 AC4SA's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AC4SA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AC4SA, oldest first.
- VASILOPOULOS, KONSTADINOS G FL1992-09-08 → cancelled 2004-09-09
- Chandler, Allen AL2023-12-01 active