Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4AT callsign genealogy
Currently held by Hennessey, Claude 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 W4AT's current licensee, walking backwards.
- Hennessey, Claude MVAgranted 2002-06-17cancelled 2011-11-01
Successor callsigns
Callsigns held now by people who previously held W4AT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4AT, oldest first.
- Hennessey, Charles W FL2006-03-02 → cancelled 2010-12-29
- Hennessey, Claude M VA2021-08-11 active