Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM3X callsign genealogy
Currently held by Mennig, Brian K
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 KM3X's current licensee, walking backwards.
- Mennig, Brian KPAgranted 2003-10-16cancelled 2005-04-01
Successor callsigns
Callsigns held now by people who previously held KM3X.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM3X, oldest first.
- WALTER JR, DAVID W PA1987-11-17 → cancelled 1999-11-18
- Mennig, Brian K PA2025-04-11 active