Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9WFK callsign genealogy
Currently held by Ulrich, Susanna
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 KC9WFK's current licensee, walking backwards.
- Ulrich, SusannaWIgranted 2012-02-21cancelled 2012-06-25
Successor callsigns
Callsigns held now by people who previously held KC9WFK.
- Ulrich, SusannaWIgranted 2012-02-21cancelled 2024-02-22