Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4SBO callsign genealogy
Currently held by JACKSON COUNTY ARES RACES
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 W4SBO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4SBO.
- K4SCOactiveJACKSON COUNTY ARES RACESALgranted 2023-10-17
All historical holders
Every license row we've seen with the callsign W4SBO, oldest first.
- JACKSON COUNTY ARES RACES AL2006-09-23 → cancelled 2013-10-17
- Cordle III, Robert E SC2024-11-30 active