Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN7SFZ callsign genealogy
Currently held by SCHUMANN, RICHARD D
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 KN7SFZ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KN7SFZ.
No current licensee on record previously held this callsign.