Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W8ZAC callsign genealogy
Currently held by Treadwell, Zachary D
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 W8ZAC's current licensee, walking backwards.
- Treadwell, Zachary DMIgranted 2013-07-06cancelled 2015-01-21
Successor callsigns
Callsigns held now by people who previously held W8ZAC.
No current licensee on record previously held this callsign.