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

KP4CW callsign genealogy

Currently held by BONILLA, EFRAIN S

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 KP4CW's current licensee, walking backwards.

  1. KX4CWactive· E
    TOUSSAINT, MARKFLgranted 2025-09-27
  2. N1MTcancelled· E
    Toussaint, MarkFLgranted 2019-01-31cancelled 2025-09-27
  3. AJ1Xactive· E
    ZIMMATORE JR, JOHN JMAgranted 2025-11-25
  4. W4JJZactive· G
    RITACCO, PAUL AFLgranted 2016-10-15
  5. WA3HBEcancelled· G
    RITACCO, PAUL ADCgranted 2006-09-06cancelled 2016-10-15

Successor callsigns

Callsigns held now by people who previously held KP4CW.

  1. KX4CWcancelled· A
    BONILLA, EFRAIN SFLgranted 2003-05-02cancelled 2004-10-08

All historical holders

Every license row we've seen with the callsign KP4CW, oldest first.

  • BONILLA, EFRAIN S FL
    1998-10-22 → cancelled 2003-05-02
  • BONILLA, EFRAIN S FL
    2014-07-23 active
← Back to KP4CW License history →