Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0CDK callsign genealogy
Currently held by KOONSMAN, CARL D
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 K0CDK's current licensee, walking backwards.
- KOONSMAN, CARL DCOgranted 2013-12-13cancelled 2014-02-11
Successor callsigns
Callsigns held now by people who previously held K0CDK.
No current licensee on record previously held this callsign.