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

KU5DX callsign genealogy

Currently held by RATZLAFF JR, MELVIN F

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 KU5DX's current licensee, walking backwards.

  1. KE5EEactive· A
    SCHWARTZ, STANFLgranted 2025-07-02
  2. KH6CGcancelled· A
    SCHWARTZ, STANFLgranted 2009-03-07cancelled 2015-09-15
  3. KA1YJcancelled· A
    SCHWARTZ, STANLEY RHIgranted 2007-10-03cancelled 2009-03-07

Successor callsigns

Callsigns held now by people who previously held KU5DX.

  1. K5DDactive· E
    Patout, ScottTXgranted 2026-05-27

All historical holders

Every license row we've seen with the callsign KU5DX, oldest first.

  • Patout, John S TX
    2006-07-08 → cancelled 2006-08-18
  • RATZLAFF JR, MELVIN F MS
    2018-06-28 active
← Back to KU5DX License history →