Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4BCD callsign genealogy
Currently held by Brown, Mark A
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 N4BCD's current licensee, walking backwards.
- Brown, Mark AALgranted 2008-03-03cancelled 2008-03-29
Successor callsigns
Callsigns held now by people who previously held N4BCD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4BCD, oldest first.
- THOMPSON JR, CHARLES M SC1995-02-02 → cancelled 2007-02-03
- Brown, Mark A TN2018-01-11 active