Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC9MZJ callsign genealogy
Currently held by Amateur Radio Emergency Service Of DuPage County IL
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 KC9MZJ's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KC9MZJ.
- NC9WXcancelledAmateur Radio Emergency Service Of DuPage County ILILgranted 2008-03-25cancelled 2014-04-22