Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0TJD callsign genealogy
Currently held by KLOPNER, DAVID H
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 KC0TJD's current licensee, walking backwards.
- DIEHL, THEODORE JMOgranted 2016-05-24cancelled 2016-06-18
Successor callsigns
Callsigns held now by people who previously held KC0TJD.
- KLOPNER, DAVIDMOgranted 2014-12-11
All historical holders
Every license row we've seen with the callsign KC0TJD, oldest first.
- KLOPNER, DAVID H MO2004-11-10 → cancelled 2004-12-03
- DIEHL, THEODORE J MO2026-06-02 active