Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM5YK callsign genealogy
Currently held by Mathis, Charles R
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 KM5YK's current licensee, walking backwards.
- MATHIS, CHARLES RTXgranted 2004-11-02cancelled 2004-11-10
Successor callsigns
Callsigns held now by people who previously held KM5YK.
- MATHIS, CHARLES RTXgranted 2017-01-04