Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6MM callsign genealogy
Currently held by MARCUM, WILLIAM F
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 K6MM's current licensee, walking backwards.
- Miller, John GCAgranted 1997-08-26cancelled 2005-07-08
Successor callsigns
Callsigns held now by people who previously held K6MM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6MM, oldest first.
- MARCUM, WILLIAM F CA1994-10-20 → cancelled 2003-04-26
- Miller, John G CA2025-04-18 active