Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0SU callsign genealogy
Currently held by SUTTON, BENJAMIN 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 K0SU's current licensee, walking backwards.
- Checkush, James RCOgranted 2015-03-17cancelled 2023-01-18
Successor callsigns
Callsigns held now by people who previously held K0SU.
- SUTTON, BENJAMIN WFLgranted 2020-12-29cancelled 2025-07-08
All historical holders
Every license row we've seen with the callsign K0SU, oldest first.
- BROWN, PATRICK E CO2017-01-18 → cancelled 2018-06-16
- SUTTON, BENJAMIN W FL2020-07-07 → cancelled 2020-12-29
- Checkush, James R CO2023-01-18 active