Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4DTW callsign genealogy
Currently held by Webb, David 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 K4DTW's current licensee, walking backwards.
- Webb, David TFLgranted 2012-04-23cancelled 2016-11-15
Successor callsigns
Callsigns held now by people who previously held K4DTW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4DTW, oldest first.
- HAMM, VIRGIL F TN1998-10-20 → cancelled 2010-10-21
- Webb, David T FL2026-09-12 active