Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NR4MM callsign genealogy
Currently held by Ramsden, David 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 NR4MM's current licensee, walking backwards.
- Ramsden, David EALgranted 2009-01-21cancelled 2009-08-08
Successor callsigns
Callsigns held now by people who previously held NR4MM.
No current licensee on record previously held this callsign.