Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7ATZ callsign genealogy
Currently held by Matheson, Donald 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 W7ATZ's current licensee, walking backwards.
- Matheson, Donald AWAgranted 2010-03-12cancelled 2010-04-09
Successor callsigns
Callsigns held now by people who previously held W7ATZ.
No current licensee on record previously held this callsign.