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

WJ4J callsign genealogy

Currently held by EHRENBERG, WILLIAM D

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 WJ4J's current licensee, walking backwards.

  1. AK4AJcancelled· E
    CARUSO, LEONARDONJgranted 2024-07-12cancelled 2025-05-09
  2. AD2IGcancelled· E
    CARUSO, LEONARDONJgranted 2024-05-16cancelled 2024-07-12
  3. KE2DKNcancelled· E
    CARUSO, LEONARDONJgranted 2024-05-16cancelled 2024-06-20

Successor callsigns

Callsigns held now by people who previously held WJ4J.

  1. AE2Iactive· E
    CARUSO, LEONARDONJgranted 2025-06-21

All historical holders

Every license row we've seen with the callsign WJ4J, oldest first.

  • EHRENBERG, WILLIAM D FL
    2013-02-13 → cancelled 2025-04-22
  • CARUSO, LEONARDO NJ
    2025-05-09 → cancelled 2025-06-21
← Back to WJ4J License history →