Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KP4JS callsign genealogy
Currently held by MARTINEZ FUENTES, JORGE V
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 KP4JS's current licensee, walking backwards.
- SANTANA LOPEZ, JOSE APRgranted 2019-02-20
Successor callsigns
Callsigns held now by people who previously held KP4JS.
- SANTANA LOPEZ, JOSE APRgranted 2019-02-20
All historical holders
Every license row we've seen with the callsign KP4JS, oldest first.
- MARTINEZ FUENTES, JORGE V PR1997-01-07 → cancelled 2009-01-08
- SANTANA LOPEZ, JOSE A PR2016-07-26 → cancelled 2019-02-20