Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9OEM 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 KD9OEM's current licensee, walking backwards.
- KB9RDZcancelledDUPAGE COUNTY OFFICE OF EMERGENCY MANAGEMENTILgranted 2007-07-30cancelled 2015-12-26
Successor callsigns
Callsigns held now by people who previously held KD9OEM.
No current licensee on record previously held this callsign.