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

KP4DJ callsign genealogy

Currently held by PUERTO RICO TELEGRAPHY SOCIETY

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 KP4DJ's current licensee, walking backwards.

  1. KP3CQactive· E
    Acevedo Rosario, Luis FPRgranted 2023-02-22
  2. WP4IEIcancelled· E
    Acevedo Rosario, Luis FPRgranted 2007-06-06cancelled 2013-03-26

Successor callsigns

Callsigns held now by people who previously held KP4DJ.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KP4DJ, oldest first.

  • WERNER, WILLIAM C PR
    1993-12-14 → cancelled 2005-12-15
  • PUERTO RICO TELEGRAPHY SOCIETY PR
    2016-03-30 active
← Back to KP4DJ License history →