Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ZAB callsign genealogy
Currently held by Alonso, Ramon M
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 K4ZAB's current licensee, walking backwards.
- Alonso, Ramon MFLgranted 2017-12-19cancelled 2018-04-28
Successor callsigns
Callsigns held now by people who previously held K4ZAB.
No current licensee on record previously held this callsign.