Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3DH callsign genealogy
Currently held by SWANDIC, BERNARD 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 K3DH's current licensee, walking backwards.
- Heimburger, Donald ACAgranted 2002-03-19cancelled 2009-06-30
Successor callsigns
Callsigns held now by people who previously held K3DH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K3DH, oldest first.
- SWANDIC, BERNARD J MD1988-08-23 → cancelled 2000-08-24
- HUNT, DONALD L TN2000-10-24 → cancelled 2004-04-10
- Heimburger, Donald A WA2019-05-13 active