Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5ZAX callsign genealogy
Currently held by DETVILER, JOHN T
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 W5ZAX's current licensee, walking backwards.
- DETVILER, JOHN TTXgranted 2024-06-28cancelled 2025-12-30
Successor callsigns
Callsigns held now by people who previously held W5ZAX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5ZAX, oldest first.
- DARY Mr., DAVID A OK2008-09-03 → cancelled 2018-03-15
- DETVILER, JOHN T TX2025-12-30 active