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

WP4S callsign genealogy

Currently held by VELEZ RAMOS, ALFREDO

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 WP4S's current licensee, walking backwards.

  1. KP4RAAexpired
    Radioaficionados En Accion, IncPRgranted 2005-03-15cancelled 2017-03-16
  2. WP4NPIcancelled
    Radioaficionados En Accion, IncPRgranted 2004-11-22cancelled 2005-03-15

Successor callsigns

Callsigns held now by people who previously held WP4S.

  1. WP3Cactive· E
    VELEZ RAMOS, ALFREDOPRgranted 2017-07-19

All historical holders

Every license row we've seen with the callsign WP4S, oldest first.

  • Santos Llanos, Rafael PR
    2022-06-23 active
  • VELEZ RAMOS, ALFREDO
    — → cancelled 1997-10-16
← Back to WP4S License history →