Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K8MRK callsign genealogy
Currently held by KOYLE, MYRON R
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 K8MRK's current licensee, walking backwards.
- KRENZ, MICHAEL RMIgranted 2005-06-16cancelled 2007-09-07
Successor callsigns
Callsigns held now by people who previously held K8MRK.
- KOYLE, MYRON ROHgranted 1998-12-30cancelled 2010-12-31
All historical holders
Every license row we've seen with the callsign K8MRK, oldest first.
- KRENZ, MICHAEL R MI2017-07-06 active
- KOYLE, MYRON R— → cancelled 1998-12-30