Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9WFJ callsign genealogy
Currently held by Ulrich, James F
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 KC9WFJ's current licensee, walking backwards.
- Ulrich, James FWIgranted 2012-02-21cancelled 2012-06-25
Successor callsigns
Callsigns held now by people who previously held KC9WFJ.
- Ulrich, James FWIgranted 2022-05-13