Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NA4US callsign genealogy
Currently held by HOFFMAN, MARK R
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 NA4US's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NA4US.
No current licensee on record previously held this callsign.