Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6MDB callsign genealogy
Currently held by BLASIUS, MARK D
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 W6MDB's current licensee, walking backwards.
- BLASIUS, MARK DCAgranted 2012-03-03cancelled 2018-12-27
Successor callsigns
Callsigns held now by people who previously held W6MDB.
No current licensee on record previously held this callsign.