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Confidence: Medium · Source: FCC ULS · As of 2026-09-11

KB4DX callsign genealogy

Currently held by SCHROEDER, WALTER J

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 KB4DX's current licensee, walking backwards.

  1. KQ4ODZcancelled
    FORT MILL CONTEST CLUBSCgranted 2024-01-27cancelled 2024-02-21

Successor callsigns

Callsigns held now by people who previously held KB4DX.

  1. K4NDXactive
    FORT MILL CONTEST CLUBSCgranted 2025-12-23
  2. W7WZactive· E
    FULTON, JOHN DSCgranted 2022-12-28
  3. KL1Ractive· E
    RONNE JR, MARSHALL GAKgranted 2019-11-15
  4. WB7SSexpired· A
    SHULTZ, SCOTT CNVgranted 2012-07-06cancelled 2024-07-09

All historical holders

Every license row we've seen with the callsign KB4DX, oldest first.

  • SCHROEDER, WALTER J KY
    1998-08-05 → cancelled 2010-08-06
  • SHULTZ, SCOTT C FL
    2010-11-09 → cancelled 2012-07-06
  • RONNE JR, MARSHALL G AK
    2014-07-26 → cancelled 2019-11-15
  • FULTON, JOHN D SC
    2021-12-04 → cancelled 2022-12-28
  • FORT MILL CONTEST CLUB SC
    2024-02-21 → cancelled 2025-12-23
← Back to KB4DX License history →