Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4SHP callsign genealogy
Currently held by SILLS, MICHAEL 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 KC4SHP's current licensee, walking backwards.
- SILLS, MICHAEL CNCgranted 2004-04-14cancelled 2008-04-05
Successor callsigns
Callsigns held now by people who previously held KC4SHP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4SHP, oldest first.
- ATCHISON, ALAN D AL1990-10-02 → cancelled 2002-10-03
- SILLS, MICHAEL C NC2018-03-30 active