Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AE4OJ callsign genealogy
Currently held by GREENWALD, DAVID C
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 AE4OJ's current licensee, walking backwards.
- BARKER, CHARLES EFLgranted 2014-08-27cancelled 2014-10-15
Successor callsigns
Callsigns held now by people who previously held AE4OJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AE4OJ, oldest first.
- GREENWALD, DAVID C FL1995-12-01 → cancelled 2006-12-14
- BARKER, CHARLES E AR2024-10-02 active