Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4JSM callsign genealogy
Currently held by SEGUI MEDINA, JOSE A
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 WP4JSM's current licensee, walking backwards.
- SEGUI MEDINA, JOSE APRgranted 2014-06-30cancelled 2015-02-24
Successor callsigns
Callsigns held now by people who previously held WP4JSM.
- SEGUI MEDINA, JOSE APRgranted 2025-10-01
All historical holders
Every license row we've seen with the callsign WP4JSM, oldest first.
- FLORES, MAIRA I PR1990-12-24 → cancelled 2002-12-25
- SEGUI MEDINA, JOSE A PR2015-02-24 → cancelled 2015-11-20