Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3JDB callsign genealogy
Currently held by Byrnes, Jeffrey 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 W3JDB's current licensee, walking backwards.
- Byrnes, Jeffrey DPAgranted 2011-09-13cancelled 2011-10-04
Successor callsigns
Callsigns held now by people who previously held W3JDB.
- Byrnes, Jeffrey DPAgranted 2025-12-09