Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM6ZX callsign genealogy
Currently held by SILSBY, JOHN J
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 KM6ZX's current licensee, walking backwards.
- Moore, Brian KCAgranted 2019-02-21cancelled 2020-09-04
Successor callsigns
Callsigns held now by people who previously held KM6ZX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM6ZX, oldest first.
- SILSBY, JOHN J CA1992-08-25 → cancelled 2004-08-26
- Moore, Brian K CA2020-09-04 active