Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6ADO callsign genealogy
Currently held by MALDONADO, MICHAEL R
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 W6ADO's current licensee, walking backwards.
- MALDONADO, MICHAEL RCAgranted 2023-01-31cancelled 2026-04-07
Successor callsigns
Callsigns held now by people who previously held W6ADO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6ADO, oldest first.
- SIZEMORE SR, WILLIAM C CA2006-12-20 → cancelled 2018-12-11
- MALDONADO, MICHAEL R CA2026-04-07 active