Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6MDD callsign genealogy
Currently held by Dahlen, Mark
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 W6MDD's current licensee, walking backwards.
- Dahlen, MarkCAgranted 2011-12-22cancelled 2012-01-10
Successor callsigns
Callsigns held now by people who previously held W6MDD.
No current licensee on record previously held this callsign.