Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0DEF callsign genealogy
Currently held by PIPER IV, RICH N
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 KC0DEF's current licensee, walking backwards.
- FIELDS, DOUGLAS EMOgranted 2020-02-10cancelled 2020-03-07
Successor callsigns
Callsigns held now by people who previously held KC0DEF.
- Piper IV, Richard NILgranted 2019-03-30
All historical holders
Every license row we've seen with the callsign KC0DEF, oldest first.
- FIELDS, DOUGLAS E MO2020-03-07 active
- PIPER IV, RICH N— → cancelled 1999-04-09