Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0JJD callsign genealogy
Currently held by Duemling, John J
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 K0JJD's current licensee, walking backwards.
- Duemling, John JCOgranted 2019-12-16cancelled 2020-07-18
Successor callsigns
Callsigns held now by people who previously held K0JJD.
No current licensee on record previously held this callsign.