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

KP4SU callsign genealogy

Currently held by Santiago 540, Roberto

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 KP4SU's current licensee, walking backwards.

  1. WP4JRBactive· T
    Burgos-Rivera, Jose RPRgranted 2025-06-26
  2. WP4OLQcancelled· T
    Burgos-Rivera, Jose RPRgranted 2011-09-28cancelled 2015-09-18

Successor callsigns

Callsigns held now by people who previously held KP4SU.

  1. AC1LKactive· E
    Santiago, RobertoFLgranted 2021-08-06
← Back to KP4SU License history →