Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4RAA callsign genealogy
Currently held by Radioaficionados En Accion, Inc
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 KP4RAA's current licensee, walking backwards.
- WP4NPIcancelledRadioaficionados En Accion, IncPRgranted 2004-11-22cancelled 2005-03-15
Successor callsigns
Callsigns held now by people who previously held KP4RAA.
- Santos Llanos, RafaelPRgranted 2022-06-23
All historical holders
Every license row we've seen with the callsign KP4RAA, oldest first.
- Santos Llanos, Rafael PR1998-08-19 → cancelled 2002-07-02
- Radioaficionados En Accion, Inc PR2005-03-15 → cancelled 2017-03-16