Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1YDB callsign genealogy
Currently held by Blackburn Jr, Douglas E
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 W1YDB's current licensee, walking backwards.
- Blackburn Jr, Douglas EMAgranted 2018-05-16cancelled 2021-02-06
Successor callsigns
Callsigns held now by people who previously held W1YDB.
No current licensee on record previously held this callsign.