Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4ZD callsign genealogy
Currently held by CLARK, DUANE A
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 AC4ZD's current licensee, walking backwards.
- KD4CVQno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held AC4ZD.
- CLARK, DUANE ATNgranted 2017-01-04