Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1DAO callsign genealogy
Currently held by WALLACE, KENNETH 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 W1DAO's current licensee, walking backwards.
- Tham, WarrenCAgranted 2016-11-22cancelled 2016-12-10
Successor callsigns
Callsigns held now by people who previously held W1DAO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1DAO, oldest first.
- WALLACE, KENNETH A NH1993-11-09 → cancelled 2001-06-18
- Tham, Warren CA2016-12-10 active