Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NB4R callsign genealogy
Currently held by ENCK, WARREN H
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 NB4R's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NB4R.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NB4R, oldest first.
- ENCK, WARREN H FL2004-12-14 → cancelled 2017-03-08
- Duckworth, Ruben B TN2017-03-28 active