Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9ZN callsign genealogy
Currently held by WELSH, DAVID W
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 AC9ZN's current licensee, walking backwards.
- WELSH, DAVID WILgranted 2012-04-05cancelled 2022-01-18
Successor callsigns
Callsigns held now by people who previously held AC9ZN.
- WELSH, DAVID WILgranted 2022-02-05