Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0OLS callsign genealogy
Currently held by Williamson, Joshua F
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 K0OLS's current licensee, walking backwards.
- McKee III, William MTNgranted 2021-09-21cancelled 2021-10-09
Successor callsigns
Callsigns held now by people who previously held K0OLS.
- Williamson, Joshua FVAgranted 2018-03-13
All historical holders
Every license row we've seen with the callsign K0OLS, oldest first.
- Williamson, Joshua F VA2017-11-21 → cancelled 2018-03-13
- McKee III, William M TN2021-10-09 active