Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NT3U callsign genealogy
Currently held by Vetter, Donald W
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 NT3U's current licensee, walking backwards.
- Vetter, Donald WMDgranted 2019-12-16cancelled 2020-09-01
Successor callsigns
Callsigns held now by people who previously held NT3U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NT3U, oldest first.
- Lawson, Arnold E PA2008-07-21 → cancelled 2018-05-15
- Vetter, Donald W MD2020-09-01 active