Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4AB callsign genealogy
Currently held by RIVERA RODRIGUEZ, WILFREDO
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 KP4AB's current licensee, walking backwards.
- RIVERA RODRIGUEZ, WILFREDOPRgranted 2003-04-15cancelled 2005-03-02
Successor callsigns
Callsigns held now by people who previously held KP4AB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4AB, oldest first.
- RODRIGUEZ, CARLOS E PR1999-06-01 → cancelled 2001-01-02
- RIVERA RODRIGUEZ, WILFREDO PR2015-01-22 active