Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0TO callsign genealogy
Currently held by K0TO HF Society
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 K0TO's current licensee, walking backwards.
- KI7IDMcancelledK0TO HF SocietyIDgranted 2016-11-07cancelled 2017-01-14
Successor callsigns
Callsigns held now by people who previously held K0TO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0TO, oldest first.
- OLSON, TOD MN2008-04-09 → cancelled 2016-11-12
- K0TO HF Society ID2017-01-14 active