Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC9QMD callsign genealogy
Currently held by Warmoth, William 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 KC9QMD's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KC9QMD.
- Warmoth, William JILgranted 2017-06-27