Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5ZAC callsign genealogy
Currently held by THOMPSON, HUGH 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 W5ZAC's current licensee, walking backwards.
- Helmberger, Zachrey JNMgranted 2021-11-17cancelled 2022-05-03
Successor callsigns
Callsigns held now by people who previously held W5ZAC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5ZAC, oldest first.
- THOMPSON, HUGH A OK1987-12-08 → cancelled 1999-12-09
- Helmberger, Zachrey J NM2022-05-03 active