Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KY4Z callsign genealogy
Currently held by MALDONADO, JAVIER T
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 KY4Z's current licensee, walking backwards.
- Brooks Jr, James EKYgranted 1998-03-26cancelled 2004-03-26
Successor callsigns
Callsigns held now by people who previously held KY4Z.
- MALDONADO, JAVIER TCAgranted 2002-03-07cancelled 2009-11-28
All historical holders
Every license row we've seen with the callsign KY4Z, oldest first.
- MALDONADO, JAVIER T OK1999-05-03 → cancelled 2002-03-07
- Brooks Jr, James E KY2024-08-06 active