Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4SBI callsign genealogy
Currently held by TINGLE, RON
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 N4SBI's current licensee, walking backwards.
- BROWN, JAMES CNCgranted 2016-08-24cancelled 2020-06-01
Successor callsigns
Callsigns held now by people who previously held N4SBI.
- TINGLE, RONNCgranted 2026-07-25
All historical holders
Every license row we've seen with the callsign N4SBI, oldest first.
- TINGLE, RON NC1998-08-21 → cancelled 2006-09-29
- BROWN, JAMES C NC2020-06-01 active