Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC1KSB callsign genealogy
Currently held by Harris, Matthew J
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 KC1KSB's current licensee, walking backwards.
- Harris, Matthew JMEgranted 2019-02-20cancelled 2019-03-27
Successor callsigns
Callsigns held now by people who previously held KC1KSB.
- Harris, Matthew JMEgranted 2019-02-20cancelled 2019-03-27
All historical holders
Every license row we've seen with the callsign KC1KSB, oldest first.
- Harris, Matthew J ME2018-12-26 → cancelled 2019-02-20
- Harris, Matthew J UT2019-03-27 active