Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6MR callsign genealogy
Currently held by MC BAIN, DONALD C
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 K6MR's current licensee, walking backwards.
- Rast, MartinCAgranted 2025-02-25cancelled 2025-12-09
Successor callsigns
Callsigns held now by people who previously held K6MR.
- WEBSTER, JOHNCAgranted 2011-12-10cancelled 2024-03-07
All historical holders
Every license row we've seen with the callsign K6MR, oldest first.
- MC BAIN, DONALD C CA1997-04-10 → cancelled 1997-04-09
- WEBSTER, JOHN CA1999-10-30 → cancelled 2002-03-06
- BEALS, KENNETH A CA2014-01-14 → cancelled 2023-11-13
- Rast, Martin CA2025-12-09 active