Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC1WTO callsign genealogy
Currently held by Ostroff, William T
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 KC1WTO's current licensee, walking backwards.
- Ostroff, William TCTgranted 2018-04-19cancelled 2018-05-15
Successor callsigns
Callsigns held now by people who previously held KC1WTO.
No current licensee on record previously held this callsign.