Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4US callsign genealogy
Currently held by STEMPIEN, DAVID L
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 KX4US's current licensee, walking backwards.
- STEMPIEN, DAVID LALgranted 2010-04-06cancelled 2019-09-26
Successor callsigns
Callsigns held now by people who previously held KX4US.
No current licensee on record previously held this callsign.