Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM9BUD callsign genealogy
Currently held by Campbell, Matthew J
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 KM9BUD's current licensee, walking backwards.
- Campbell, Matthew JILgranted 2021-06-15cancelled 2021-07-07
Successor callsigns
Callsigns held now by people who previously held KM9BUD.
- Campbell, Matthew JILgranted 2021-11-06cancelled 2025-09-16