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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

KP4JAR callsign genealogy

Currently held by ROLDAN, 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 KP4JAR's current licensee, walking backwards.

  1. KP3Xactive· E
    Cifredo-Perello, JoelPRgranted 2022-12-17
  2. KP3JCcancelled· E
    Cifredo-Perello, JoelPRgranted 2020-08-14cancelled 2022-12-17
  3. WP4NVTcancelled· E
    Cifredo Perello, JoelPRgranted 2018-04-17cancelled 2020-08-14

Successor callsigns

Callsigns held now by people who previously held KP4JAR.

  1. KP3Xcancelled· E
    ROLDAN, JOSE APRgranted 2018-12-15cancelled 2020-11-28

All historical holders

Every license row we've seen with the callsign KP4JAR, oldest first.

  • ROLDAN, JOSE A PR
    2018-11-19 → cancelled 2018-12-15
  • ROLDAN, JOSE A PR
    2020-11-28 active
← Back to KP4JAR License history →