Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4RF callsign genealogy
Currently held by CARRO SANTISTEBAN, REY F
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 WP4RF's current licensee, walking backwards.
- Carro Santisteban, Rey FPRgranted 2014-12-10cancelled 2016-02-12
Successor callsigns
Callsigns held now by people who previously held WP4RF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4RF, oldest first.
- HERNANDEZ, YOLANDA PR1998-11-06 → cancelled 2010-11-09
- CARRO SANTISTEBAN, REY F PR2026-01-21 active