Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9BPH callsign genealogy
Currently held by Hamm, Matthew 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 KC9BPH's current licensee, walking backwards.
- Hamm, Matthew TILgranted 2001-11-05cancelled 2002-04-18
Successor callsigns
Callsigns held now by people who previously held KC9BPH.
- Hamm, Matthew TALgranted 2022-02-08