Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4MDC callsign genealogy
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 N4MDC's current licensee, walking backwards.
- Church, Matthew DFLgranted 2019-08-15cancelled 2019-10-18
Successor callsigns
Callsigns held now by people who previously held N4MDC.
- WILMERDING, JAMES W WMEgranted 1998-12-15cancelled 2002-09-27
All historical holders
Every license row we've seen with the callsign N4MDC, oldest first.
- Church, Matthew D FL2019-10-18 active
- —— → cancelled 1998-12-15