Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NC4MB callsign genealogy
Currently held by Blackman, Michael 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 NC4MB's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NC4MB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NC4MB, oldest first.
- Blackman, Michael T NC2010-06-11 → cancelled 2022-08-20
- BYRD, MATTHEW S NC2023-09-08 active