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

KP4IZ callsign genealogy

Currently held by PEREZ, JOHNNY W

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 KP4IZ's current licensee, walking backwards.

  1. KP4JPactive· A
    PEREZ, JOAQUINPRgranted 2019-12-19
  2. KP4ZOcancelled· A
    PEREZ, JOAQUINPRgranted 2009-06-02cancelled 2009-09-22

Successor callsigns

Callsigns held now by people who previously held KP4IZ.

  1. KP4JPcancelled· A
    PEREZ, JOHNNY WPRgranted 2006-01-10cancelled 2006-04-11
  2. KP4JPcancelled· A
    PEREZ, JOHNNY WPRgranted 2004-11-23cancelled 2005-02-08
  3. WP4ACQcancelled· A
    PEREZ, JOHNNY WPRgranted 2004-06-16cancelled 2004-07-09

All historical holders

Every license row we've seen with the callsign KP4IZ, oldest first.

  • PEREZ, JOHNNY W PR
    1997-07-09 → cancelled 2004-06-16
  • PEREZ, JOHNNY W PR
    2004-07-09 → cancelled 2004-11-23
  • PEREZ, JOHNNY W PR
    2005-02-08 → cancelled 2006-01-10
  • PEREZ, JOHNNY W PR
    2006-04-11 → cancelled 2018-04-12
← Back to KP4IZ License history →