Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3ZN callsign genealogy
Currently held by JADCO Engineering Group
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 W3ZN's current licensee, walking backwards.
- KJ4BRDcancelledJADCO Engineering GroupFLgranted 2008-02-04cancelled 2008-02-22
Successor callsigns
Callsigns held now by people who previously held W3ZN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3ZN, oldest first.
- DOUGLAS SR, JAMES A MD1997-05-22 → cancelled 2005-06-17
- JADCO Engineering Group FL2018-01-18 active