Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0Z callsign genealogy
Currently held by JERDON, RONALD 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 KC0Z's current licensee, walking backwards.
- Clabaugh, Douglas RIAgranted 2002-07-26cancelled 2010-10-16
Successor callsigns
Callsigns held now by people who previously held KC0Z.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC0Z, oldest first.
- JERDON, RONALD D MN2006-01-11 → cancelled 2007-09-08
- Clabaugh, Douglas R IA2020-09-01 active