Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ABX callsign genealogy
Currently held by LOPEZ, MICHAEL
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 K4ABX's current licensee, walking backwards.
- Lopez, MichaelFLgranted 2020-05-01cancelled 2020-05-22
Successor callsigns
Callsigns held now by people who previously held K4ABX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ABX, oldest first.
- Morton, Geoffrey J KY2007-11-24 → cancelled 2019-11-26
- LOPEZ, MICHAEL FL2020-05-22 active