Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4KY callsign genealogy
Currently held by SULLIVAN, MICHAEL S
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 KX4KY's current licensee, walking backwards.
- SULLIVAN, MICHAEL SGAgranted 2013-04-30cancelled 2018-05-01
Successor callsigns
Callsigns held now by people who previously held KX4KY.
No current licensee on record previously held this callsign.