Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NR5B callsign genealogy
Currently held by Oscarson, David J
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 NR5B's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NR5B.
No current licensee on record previously held this callsign.