Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9DBM callsign genealogy
Currently held by MATTHEWS, DAVID B
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 K9DBM's current licensee, walking backwards.
- MATTHEWS, DAVID BTXgranted 2018-01-09cancelled 2023-11-04
Successor callsigns
Callsigns held now by people who previously held K9DBM.
All historical holders
Every license row we've seen with the callsign K9DBM, oldest first.
- Morgan, William CA2012-03-10 → cancelled 2020-11-17
- MATTHEWS, DAVID B TX2023-11-04 → cancelled 2023-12-22