Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3JDI callsign genealogy
Currently held by Isaak, James D
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 W3JDI's current licensee, walking backwards.
- Isaak, James DNHgranted 2017-11-13cancelled 2018-03-16
Successor callsigns
Callsigns held now by people who previously held W3JDI.
No current licensee on record previously held this callsign.