Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM6USM callsign genealogy
Currently held by Kraszczynski, Szymon 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 KM6USM's current licensee, walking backwards.
- Kraszczynski, Szymon KGAgranted 2017-01-10cancelled 2017-02-10
Successor callsigns
Callsigns held now by people who previously held KM6USM.
No current licensee on record previously held this callsign.