Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9UNX callsign genealogy
Currently held by MUMFORD, JAMES O
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 K9UNX's current licensee, walking backwards.
- MUMFORD, JAMES OILgranted 2008-03-05cancelled 2009-03-24
Successor callsigns
Callsigns held now by people who previously held K9UNX.
- MUMFORD Jr, JAMES OINgranted 2019-02-05