Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AC9JJ callsign genealogy
Currently held by Piva, William 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 AC9JJ's current licensee, walking backwards.
- Jacobs, Jeffrey AWIgranted 2018-02-15cancelled 2019-02-20
Successor callsigns
Callsigns held now by people who previously held AC9JJ.
- Piva, William JILgranted 2008-01-05cancelled 2015-01-16
All historical holders
Every license row we've seen with the callsign AC9JJ, oldest first.
- Piva, William J IL2008-01-05 → cancelled 2015-01-10
- Jacobs, Jeffrey A WI2019-02-20 active