Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9SZ callsign genealogy
Currently held by Wittmer, Joseph E
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 K9SZ's current licensee, walking backwards.
- Wittmer, Joseph EILgranted 1998-05-21cancelled 2002-06-08
Successor callsigns
Callsigns held now by people who previously held K9SZ.
No current licensee on record previously held this callsign.