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

KP4CH callsign genealogy

Currently held by MARTINEZ, JUAN C

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 KP4CH's current licensee, walking backwards.

  1. WP4KLcancelled· E
    SERRANO ROSA, JOSE LPRgranted 2012-11-10cancelled 2013-05-21
  2. NP3JPcancelled· G
    SERRANO ROSA, JOSE LPRgranted 2005-01-25cancelled 2012-11-10
  3. WP4MWH
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held KP4CH.

  1. W9OTactive· E
    SERRANO, JOSE LINgranted 2024-10-11

All historical holders

Every license row we've seen with the callsign KP4CH, oldest first.

  • MARTINEZ, JUAN C PR
    1998-04-21 → cancelled 2010-04-22
  • SERRANO, JOSE L IN
    2023-03-25 → cancelled 2024-10-11
← Back to KP4CH License history →