Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC5MS callsign genealogy
Currently held by COALTER III, CHARLES E
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 KC5MS's current licensee, walking backwards.
- SMITH, MICHAEL FOKgranted 2017-01-06cancelled 2019-06-07
Successor callsigns
Callsigns held now by people who previously held KC5MS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC5MS, oldest first.
- COALTER III, CHARLES E CA2006-02-25 → cancelled 2018-03-21
- SMITH, MICHAEL F OK2019-06-07 active