Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9MAU callsign genealogy
Currently held by Peters, Matthew S
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 K9MAU's current licensee, walking backwards.
- Peters, Matthew SWIgranted 2019-07-19cancelled 2019-08-06
Successor callsigns
Callsigns held now by people who previously held K9MAU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9MAU, oldest first.
- BALKWILL, CHARLES A WI2006-06-17 → cancelled 2018-09-06
- Peters, Matthew S AL2019-08-06 active