Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4O callsign genealogy
Currently held by BONNER JR, ROBERT W
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 KZ4O's current licensee, walking backwards.
- BONNER JR, ROBERT WTXgranted 2023-02-15cancelled 2023-06-22
Successor callsigns
Callsigns held now by people who previously held KZ4O.
- BENTON, TERRENCESCgranted 2021-05-25
All historical holders
Every license row we've seen with the callsign KZ4O, oldest first.
- THIGPEN, ROBERT R NC2004-09-17 → cancelled 2016-12-17
- BENTON, TERRENCE SC2017-01-06 → cancelled 2021-05-25
- BONNER JR, ROBERT W TX2023-06-22 active