Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4ATT callsign genealogy
Currently held by Cabrera-Rivera, Geraldo
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 KP4ATT's current licensee, walking backwards.
- Cabrera-Rivera, GeraldoPRgranted 2001-11-19cancelled 2002-11-09
Successor callsigns
Callsigns held now by people who previously held KP4ATT.
No current licensee on record previously held this callsign.