Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N3MTB callsign genealogy
Currently held by DUVALL, JOHN B
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 N3MTB's current licensee, walking backwards.
- BOWDLER, MICHAEL TNYgranted 2014-09-19cancelled 2021-03-20
Successor callsigns
Callsigns held now by people who previously held N3MTB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3MTB, oldest first.
- DUVALL, JOHN B MD1992-06-23 → cancelled 2004-06-24
- BOWDLER, MICHAEL T NY2021-03-20 active