Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4YE callsign genealogy
Currently held by PANTOJA MONTERO, CESAR 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 KP4YE's current licensee, walking backwards.
- PANTOJA MONTERO, CESAR APRgranted 2022-06-01cancelled 2023-02-17
Successor callsigns
Callsigns held now by people who previously held KP4YE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4YE, oldest first.
- MARTINEZ, JOSE R PR1989-05-02 → cancelled 2001-05-03
- PANTOJA MONTERO, CESAR A PR2023-02-17 active