Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4ZX callsign genealogy
Currently held by Finger, 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 AC4ZX's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AC4ZX.
- Finger, Robert JFLgranted 2022-12-14cancelled 2026-02-25