Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9RU callsign genealogy
Currently held by BROWN, CHARLES 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 N9RU's current licensee, walking backwards.
- COSTA, THOMAS PILgranted 2006-07-08cancelled 2010-07-07
- N9GMWno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held N9RU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9RU, oldest first.
- BROWN, CHARLES J TX1999-05-05 → cancelled 2007-09-18
- COSTA, THOMAS P IL2020-04-22 active