Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9MDL callsign genealogy
Currently held by Lockwood, Matthew D
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 K9MDL's current licensee, walking backwards.
- Lockwood, Matthew DINgranted 2019-02-19cancelled 2019-03-29
Successor callsigns
Callsigns held now by people who previously held K9MDL.
- Lockwood, Matthew DINgranted 2020-09-09