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

K4TDT callsign genealogy

Currently held by Thuss, Todd 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 K4TDT's current licensee, walking backwards.

  1. KM4ZTOcancelled· T
    Thomas, Todd DNCgranted 2016-12-19cancelled 2017-02-04

Successor callsigns

Callsigns held now by people who previously held K4TDT.

  1. N4BAactive· E
    Essig, Frederick HVAgranted 2026-08-21
  2. K4ILXactive· G
    Thomas, Todd DNCgranted 2018-07-17
  3. NM4Dcancelled· E
    Thuss, Todd DTNgranted 2012-10-05cancelled 2014-08-26

All historical holders

Every license row we've seen with the callsign K4TDT, oldest first.

  • Thuss, Todd D TN
    2003-02-19 → cancelled 2012-10-05
  • Thomas, Todd D NC
    2017-02-04 → cancelled 2018-07-17
← Back to K4TDT License history →