Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8DHH callsign genealogy
Currently held by CZAPIEWSKI, LEONARD 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 K8DHH's current licensee, walking backwards.
- CZAPIEWSKI, JOHN RMIgranted 1997-11-07cancelled 2003-04-15
Successor callsigns
Callsigns held now by people who previously held K8DHH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8DHH, oldest first.
- CZAPIEWSKI, LEONARD J MI1988-03-15 → cancelled 2000-03-16
- CZAPIEWSKI, JOHN R MI2023-03-24 active