Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4DTB callsign genealogy
Currently held by Brown, Derek 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 W4DTB's current licensee, walking backwards.
- Brown, Derek TNCgranted 2010-09-16cancelled 2011-04-26
Successor callsigns
Callsigns held now by people who previously held W4DTB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4DTB, oldest first.
- PRENTICE, JOHN J FL1998-04-17 → cancelled 2010-04-20
- Brown, Derek T WA2021-01-28 active