Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM6MMK callsign genealogy
Currently held by Chizmar, John W
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 KM6MMK's current licensee, walking backwards.
- Chizmar, John WCAgranted 2016-12-07cancelled 2017-08-31
Successor callsigns
Callsigns held now by people who previously held KM6MMK.
No current licensee on record previously held this callsign.