Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4CDK callsign genealogy
Currently held by KOETH, CHARLES 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 N4CDK's current licensee, walking backwards.
- KOLHMEYER, CHARLES DTNgranted 2023-07-26cancelled 2023-08-15
Successor callsigns
Callsigns held now by people who previously held N4CDK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4CDK, oldest first.
- KOETH, CHARLES D NC2002-05-24 → cancelled 2014-05-28
- KOLHMEYER, CHARLES D TN2023-08-15 active