Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4SJ callsign genealogy
Currently held by Joiner, Sarah M
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 AC4SJ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AC4SJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AC4SJ, oldest first.
- SCHROEDER, ALFRED C FL2002-04-09 → cancelled 2014-07-08
- Joiner, Sarah M VA2019-08-23 active