Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM6MHZ callsign genealogy
Currently held by Richter, William 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 KM6MHZ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KM6MHZ.
- Richter, William RCAgranted 2017-09-08cancelled 2017-12-05
All historical holders
Every license row we've seen with the callsign KM6MHZ, oldest first.
- Richter, William R CA2017-01-28 → cancelled 2017-09-08
- Richter, William R CA2017-12-05 active