Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4DUB callsign genealogy
Currently held by Campbell, Wallis T
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 K4DUB's current licensee, walking backwards.
- Campbell, Wallis TTNgranted 2007-11-01cancelled 2007-12-07
Successor callsigns
Callsigns held now by people who previously held K4DUB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4DUB, oldest first.
- BERNATOWICZ, LEONARD F FL1995-01-31 → cancelled 2007-02-01
- Campbell, Wallis T TX2017-11-15 active