Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC9WBU callsign genealogy
Currently held by Schroeder, Jonathan W
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 KC9WBU's current licensee, walking backwards.
- Schroeder, Jonathan WWIgranted 2010-08-17cancelled 2012-05-29
Successor callsigns
Callsigns held now by people who previously held KC9WBU.
- Schroeder, Jonathan WWIgranted 2023-04-11