Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4AT callsign genealogy
Currently held by Cooley, David 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 AC4AT's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AC4AT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AC4AT, oldest first.
- HEARNEY, JOHN D VA1990-11-20 → cancelled 2002-11-21
- Cooley, David M AL2018-09-22 active