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

WP4XX callsign genealogy

Currently held by JIMENEZ, ROLANDO V

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 WP4XX's current licensee, walking backwards.

  1. NP3UNcancelled· G
    JIMENEZ, ROLANDO VPRgranted 2008-04-16cancelled 2013-08-30

Successor callsigns

Callsigns held now by people who previously held WP4XX.

  1. KP3CMactive· E
    JIMENEZ, ROLANDO VPRgranted 2023-06-24
  2. NP4CWactive· T
    VELEZ MENDEZ, ALFREDOPRgranted 2020-01-14

All historical holders

Every license row we've seen with the callsign WP4XX, oldest first.

  • FERNANDEZ, GUSTAVO PR
    1990-06-05 → cancelled 2002-06-06
  • VELEZ MENDEZ, ALFREDO PR
    2006-10-17 → cancelled 2010-03-23
  • JIMENEZ, ROLANDO V PR
    2013-08-30 → cancelled 2015-03-09
← Back to WP4XX License history →