Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5MCS callsign genealogy
Currently held by SHADWICK, MARK C
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 K5MCS's current licensee, walking backwards.
- SHADWICK, MARK COKgranted 2008-06-05cancelled 2015-01-06
Successor callsigns
Callsigns held now by people who previously held K5MCS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5MCS, oldest first.
- ADAMS, COY W AR1997-02-17 → cancelled 2009-02-18
- SHADWICK, MARK C OK2024-12-17 active