Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB6DEF callsign genealogy
Currently held by WATHEN, WILLIAM 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 KB6DEF's current licensee, walking backwards.
- Defreitas, Brian MCAgranted 2018-02-09cancelled 2018-03-02
Successor callsigns
Callsigns held now by people who previously held KB6DEF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB6DEF, oldest first.
- WATHEN, WILLIAM D TX1994-01-04 → cancelled 2006-01-05
- DeFreitas, Brian M CA2018-03-02 active