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

KP4OJ callsign genealogy

Currently held by IRIZARRY, PEDRO G

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 KP4OJ's current licensee, walking backwards.

  1. KP4NCactive· E
    Colon-Barrios, NestorPRgranted 2021-07-02
  2. KP4NCBcancelled· E
    Colon-Barrios, NestorPRgranted 2018-06-02cancelled 2021-07-02
  3. WP4QBOcancelled· T
    Colon-Barrios, NestorPRgranted 2018-05-15cancelled 2018-06-02

Successor callsigns

Callsigns held now by people who previously held KP4OJ.

  1. KP3PIexpired· E
    IRIZARRY, PEDRO GPRgranted 2012-01-18cancelled 2024-01-19
← Back to KP4OJ License history →