Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4RJ callsign genealogy
Currently held by Achtenberg, Robert J
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 AJ4RJ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AJ4RJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AJ4RJ, oldest first.
- Powell, Troy M FL2008-10-14 → cancelled 2020-10-15
- Achtenberg, Robert J GA2023-04-01 active