Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NA6DU callsign genealogy
Currently held by Mabuhay DX Contest Club
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 NA6DU's current licensee, walking backwards.
- KN6QHScancelledMabuhay DX Contest ClubCAgranted 2021-09-01cancelled 2021-11-02
Successor callsigns
Callsigns held now by people who previously held NA6DU.
- AD0BOcancelledMabuhay DX Contest ClubCAgranted 2022-07-23cancelled 2024-10-01