Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6DDU callsign genealogy
Currently held by CELLAR, WILLIAM H
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 W6DDU's current licensee, walking backwards.
- KIRBY, GORDON LCAgranted 2011-05-26cancelled 2012-05-19
Successor callsigns
Callsigns held now by people who previously held W6DDU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6DDU, oldest first.
- CELLAR, WILLIAM H CA1998-02-27 → cancelled 2010-03-02
- KIRBY, GORDON L CA2022-03-22 active