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

W4JJJ callsign genealogy

Currently held by Louk, John

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 W4JJJ's current licensee, walking backwards.

  1. KN4WFGcancelled· T
    Louk, JohnFLgranted 2019-08-07cancelled 2020-01-24

Successor callsigns

Callsigns held now by people who previously held W4JJJ.

  1. W4PSLactive· T
    Olivo, Nicholas JFLgranted 2026-03-03
  2. NO4Vactive· E
    JONES, JOHN JSCgranted 2022-11-30

All historical holders

Every license row we've seen with the callsign W4JJJ, oldest first.

  • JONES, JOHN J SC
    2009-12-03 → cancelled 2012-10-23
  • Olivo, Nicholas J FL
    2015-07-25 → cancelled 2016-02-02
  • Louk, John FL
    2020-01-24 active
← Back to W4JJJ License history →