Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NR3D callsign genealogy
Currently held by SLOCUM, KENT L
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 NR3D's current licensee, walking backwards.
- Preston, William BMNgranted 2025-04-09cancelled 2025-06-03
Successor callsigns
Callsigns held now by people who previously held NR3D.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NR3D, oldest first.
- SLOCUM, KENT L PA2013-03-15 → cancelled 2025-05-13
- Preston, William B MN2025-06-03 active