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

KK4WTF callsign genealogy

Currently held by Smith, John 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 KK4WTF's current licensee, walking backwards.

  1. K4KRGactive· G
    Goldman, RyanFLgranted 2021-02-23
  2. KO4KOYcancelled· G
    Goldman, RyanFLgranted 2020-12-31cancelled 2021-02-23

Successor callsigns

Callsigns held now by people who previously held KK4WTF.

  1. K4KRGcancelled· T
    Smith, John TSCgranted 2018-05-05cancelled 2018-07-17

All historical holders

Every license row we've seen with the callsign KK4WTF, oldest first.

  • Smith, John T SC
    2014-01-28 → cancelled 2018-05-05
  • Smith, John T SC
    2018-07-17 active
← Back to KK4WTF License history →