Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3SBZ callsign genealogy
Currently held by SCHRAEDER, WILLIAM J
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 K3SBZ's current licensee, walking backwards.
- SCHRAEDER, WILLIAM JPAgranted 2006-01-31cancelled 2006-02-18
Successor callsigns
Callsigns held now by people who previously held K3SBZ.
No current licensee on record previously held this callsign.