Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM4NSJ callsign genealogy
Currently held by SCHERTZ, MATTHEW D
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 KM4NSJ's current licensee, walking backwards.
- SCHERTZ, MATTHEW DVAgranted 2015-01-28cancelled 2015-10-02
Successor callsigns
Callsigns held now by people who previously held KM4NSJ.
- SCHERTZ, MATTHEW DVAgranted 2025-06-21