Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8KTM callsign genealogy
Currently held by BLAZEKOVICH, JOHN
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 K8KTM's current licensee, walking backwards.
- Butler, Matthew AMIgranted 2017-05-19cancelled 2017-06-20
Successor callsigns
Callsigns held now by people who previously held K8KTM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8KTM, oldest first.
- BLAZEKOVICH, JOHN OH1997-07-22 → cancelled 2009-07-23
- Butler, Matthew A MI2017-06-20 active