Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0TTO callsign genealogy
Currently held by Kottke, Joseph
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 W0TTO's current licensee, walking backwards.
- Kottke, JosephMNgranted 2019-06-12cancelled 2026-04-07
Successor callsigns
Callsigns held now by people who previously held W0TTO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0TTO, oldest first.
- Braunschweig, Paul O ID2012-08-04 → cancelled 2024-08-06
- Kottke, Joseph MN2026-04-07 active