Confidence: Medium · Source: FCC ULS · As of 2026-09-09
K0YRN callsign genealogy
Currently held by Grimm, Michael G
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 K0YRN's current licensee, walking backwards.
- Grimm, Michael GMOgranted 2025-04-16cancelled 2025-05-09
Successor callsigns
Callsigns held now by people who previously held K0YRN.
No current licensee on record previously held this callsign.