Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5RUZ callsign genealogy
Currently held by Williams Sr, John M
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 N5RUZ's current licensee, walking backwards.
- Williams Sr, John MCOgranted 2023-11-20cancelled 2023-12-15
Successor callsigns
Callsigns held now by people who previously held N5RUZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5RUZ, oldest first.
- WILLIAMS, JOHN A TX2000-09-29 → cancelled 2012-12-27
- Williams Sr, John M CO2023-12-15 active