Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4AB callsign genealogy
Currently held by NEGRON DE RIVERA, CELIA
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 WP4AB's current licensee, walking backwards.
- NIEVES, JULIO APRgranted 2012-02-29cancelled 2015-12-15
Successor callsigns
Callsigns held now by people who previously held WP4AB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4AB, oldest first.
- NEGRON DE RIVERA, CELIA PR1997-06-26 → cancelled 2009-06-27
- NIEVES VALENTIN, JULIO A PR2025-12-16 active