Confidence: Medium · Source: FCC ULS · As of 2026-09-11
AF4UI callsign genealogy
Currently held by Caraballo Iii, Cristobal J
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 AF4UI's current licensee, walking backwards.
- CARABALLO III, CRISTOBAL JFLgranted 1993-12-21cancelled 2000-05-20
Successor callsigns
Callsigns held now by people who previously held AF4UI.
No current licensee on record previously held this callsign.