Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5NUN callsign genealogy
Currently held by CASTILLO, DAVID 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 K5NUN's current licensee, walking backwards.
- CASTILLO, DAVID RTXgranted 2014-05-27cancelled 2017-09-16
Successor callsigns
Callsigns held now by people who previously held K5NUN.
No current licensee on record previously held this callsign.