Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6MBC callsign genealogy
Currently held by Clayton, Mark
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 W6MBC's current licensee, walking backwards.
- Clayton, MarkCAgranted 2021-10-18cancelled 2021-12-10
Successor callsigns
Callsigns held now by people who previously held W6MBC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6MBC, oldest first.
- DIXON, SHIRLEY R CA2007-03-08 → cancelled 2019-05-17
- Clayton, Mark CA2021-12-10 active