Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NU4P callsign genealogy
Currently held by RADER, ROBERT N
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 NU4P's current licensee, walking backwards.
- Smith Jr, Darrell LKYgranted 2018-02-09cancelled 2018-05-08
Successor callsigns
Callsigns held now by people who previously held NU4P.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NU4P, oldest first.
- RADER, ROBERT N FL2006-01-24 → cancelled 2018-04-19
- Smith Jr, Darrell L KY2018-05-08 active