Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9JD callsign genealogy
Currently held by Sobel, Robert 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 AC9JD's current licensee, walking backwards.
- Sobel, Robert MILgranted 2013-08-08cancelled 2014-08-07
Successor callsigns
Callsigns held now by people who previously held AC9JD.
No current licensee on record previously held this callsign.