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

W4DHK callsign genealogy

Currently held by WILLIAMSON, ROBERT T

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 W4DHK's current licensee, walking backwards.

  1. KE4DHKcancelled· G
    ECKARD, MICHAEL OSCgranted 2017-08-25cancelled 2021-04-09
  2. KI4ZPKcancelled· T
    Eckard, Michael OGAgranted 2007-09-28cancelled 2007-10-16

Successor callsigns

Callsigns held now by people who previously held W4DHK.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W4DHK, oldest first.

  • WILLIAMSON, ROBERT T KY
    1990-08-14 → cancelled 2002-08-15
  • Williamson, Robert T KY
    2008-11-07 → cancelled 2020-11-10
  • ECKARD, MICHAEL O SC
    2021-04-09 active
← Back to W4DHK License history →