Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4S callsign genealogy
Currently held by Singleton, Rickey 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 KC4S's current licensee, walking backwards.
- Singleton, Rickey EKYgranted 2008-08-11cancelled 2010-05-07
Successor callsigns
Callsigns held now by people who previously held KC4S.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4S, oldest first.
- JOHNSON, HAROLD M TN1998-04-17 → cancelled 2010-04-20
- Singleton, Rickey E KY2020-02-13 active