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

WA4TK callsign genealogy

Currently held by GRAMLING JR, OLIVER 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 WA4TK's current licensee, walking backwards.

  1. K4LKYcancelled· E
    Higdon, Michael SKYgranted 2026-04-14cancelled 2026-05-08
  2. AG4HIcancelled· E
    Higdon, Michael SKYgranted 2014-12-10cancelled 2016-07-12
  3. KT4OGcancelled· E
    Higdon, Michael SKYgranted 1996-04-10cancelled 2001-03-19
  4. KE4WJI
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held WA4TK.

  1. NL7TKactive· A
    GRAMLING JR, OLIVER DWAgranted 2020-03-30

All historical holders

Every license row we've seen with the callsign WA4TK, oldest first.

  • GRAMLING JR, OLIVER D VA
    2001-10-07 → cancelled 2010-06-15
  • Higdon, Michael S KY
    2026-05-08 active
← Back to WA4TK License history →