Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3USB callsign genealogy
Currently held by KING, MICHAEL 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 N3USB's current licensee, walking backwards.
- KING, MICHAEL WMDgranted 2015-03-17cancelled 2020-02-08
Successor callsigns
Callsigns held now by people who previously held N3USB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3USB, oldest first.
- KING, WALTER J MD2015-03-17 → cancelled 2018-02-15
- KING, MICHAEL W MD2020-02-08 active