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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

KP4JB callsign genealogy

Currently held by CABAN VALENTIN, SAMUEL

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 KP4JB's current licensee, walking backwards.

  1. KP4AIactive· E
    CARMONA FIGUEROA, JULIOPRgranted 2022-03-29
  2. KP4JCFcancelled· E
    CARMONA FIGUEROA, JULIOPRgranted 2018-11-24cancelled 2022-03-29
  3. WP4QOKcancelled· T
    CARMONA FIGUEROA, JULIOPRgranted 2018-10-23cancelled 2018-11-24

Successor callsigns

Callsigns held now by people who previously held KP4JB.

  1. KP4SCactive· A
    CABAN, SAMUELPRgranted 2025-01-23

All historical holders

Every license row we've seen with the callsign KP4JB, oldest first.

  • CABAN VALENTIN, SAMUEL PR
    2011-07-16 → cancelled 2015-01-27
  • BAUZA, JUAN PA
    2017-03-03 active
← Back to KP4JB License history →