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

KW6T callsign genealogy

Currently held by MC CORMICK, SIDNEY 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 KW6T's current licensee, walking backwards.

  1. W6OHMactive· E
    KEYZER, JEFFREY SWAgranted 2021-11-10
  2. KF6PBPcancelled· E
    KEYZER, JEFFREY STXgranted 2007-10-03cancelled 2011-12-06

Successor callsigns

Callsigns held now by people who previously held KW6T.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KW6T, oldest first.

  • MC CORMICK, SIDNEY D CA
    1997-02-14 → cancelled 2009-02-18
  • Williams, Russell T CA
    2019-02-11 active