Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NU4U callsign genealogy
Currently held by DUBBS, RONALD
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 NU4U's current licensee, walking backwards.
- BARSTOW SR, GRAHAM DNCgranted 2003-07-29cancelled 2009-12-15
Successor callsigns
Callsigns held now by people who previously held NU4U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NU4U, oldest first.
- DUBBS, RONALD TN1999-12-16 → cancelled 2003-04-11
- BARSTOW SR, GRAHAM D NC2019-09-23 active