Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9RDZ callsign genealogy
Currently held by DUPAGE COUNTY OFFICE OF EMERGENCY MANAGEMENT
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 KB9RDZ'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 KB9RDZ.
- KD9OEMactiveDUPAGE COUNTY OFFICE OF EMERGENCY MANAGEMENTILgranted 2015-12-26