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

KP4SX callsign genealogy

Currently held by MEACHAM III, WILLIAM E

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 KP4SX's current licensee, walking backwards.

  1. WX4Aactive· E
    Boquiren, Billie MFLgranted 2016-12-23
  2. KW1Hactive· E
    Mathias, StevenAZgranted 2019-02-09
  3. AG7RIcancelled· E
    Mathias, StevenAZgranted 2018-12-13cancelled 2019-02-09

Successor callsigns

Callsigns held now by people who previously held KP4SX.

  1. NP4Cactive· E
    GARCIA PIZARRO JR, BENJAMINPRgranted 2022-04-30

All historical holders

Every license row we've seen with the callsign KP4SX, oldest first.

  • GARCIA PIZARRO JR, BENJAMIN PR
    2002-06-13 → cancelled 2002-07-23
  • MEACHAM III, WILLIAM E PR
    2024-11-14 active
← Back to KP4SX License history →