Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3DUG callsign genealogy
Currently held by SHEPPARD, DOUGLAS M
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 W3DUG's current licensee, walking backwards.
- SHEPPARD, DOUGLAS MPAgranted 1993-03-16cancelled 2001-06-08
Successor callsigns
Callsigns held now by people who previously held W3DUG.
- SHEPPARD, DOUGLAS MPAgranted 2019-11-19