Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX0CMU callsign genealogy
Currently held by Underwood, Curtis M
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 KX0CMU's current licensee, walking backwards.
- Underwood, Curtis MCOgranted 2014-04-02cancelled 2016-06-18
Successor callsigns
Callsigns held now by people who previously held KX0CMU.
- Underwood, Curtis MCOgranted 2017-10-24