Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1MDF callsign genealogy
Currently held by Fulmer, 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 W1MDF's current licensee, walking backwards.
- Fulmer, Mark DSCgranted 2025-08-12cancelled 2025-08-30
Successor callsigns
Callsigns held now by people who previously held W1MDF.
- Fulmer, Mark DSCgranted 2025-12-30