Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4KP callsign genealogy
Currently held by FRAGOSA, JUAN J
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 WP4KP's current licensee, walking backwards.
- Estrada Cabrero, JosuanPRgranted 2012-08-31cancelled 2021-04-27
Successor callsigns
Callsigns held now by people who previously held WP4KP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4KP, oldest first.
- FRAGOSA, JUAN J PR1987-08-25 → cancelled 1999-09-01
- Estrada Cabrero, Josuan PR2021-04-27 active