Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5SDM callsign genealogy
Currently held by KAZMIERCZAK, JOHNATHAN E
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 N5SDM's current licensee, walking backwards.
- KB5OMFno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held N5SDM.
No current licensee on record previously held this callsign.