Confidence: Medium · Source: FCC ULS · As of 2026-09-11
K4MPB callsign genealogy
Currently held by Barnes, Matthew P
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 K4MPB's current licensee, walking backwards.
- Barnes, Matthew PALgranted 2021-05-12cancelled 2021-06-02
Successor callsigns
Callsigns held now by people who previously held K4MPB.
No current licensee on record previously held this callsign.