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

KO1D callsign genealogy

Currently held by Harris, Brian 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 KO1D's current licensee, walking backwards.

  1. KG5EGPcancelled· E
    Harris, Brian DTXgranted 2014-10-08cancelled 2018-01-20

Successor callsigns

Callsigns held now by people who previously held KO1D.

  1. KT4NRactive· E
    SULLIVAN, DANIEL JVAgranted 2026-02-03
  2. W6OEexpired· E
    GLASER, SHEPARD HCAgranted 2007-07-10cancelled 2019-07-12

All historical holders

Every license row we've seen with the callsign KO1D, oldest first.

  • SULLIVAN, DANIEL J VA
    2013-10-18 → cancelled 2015-12-29
  • Harris, Brian D TX
    2018-01-20 active
← Back to KO1D License history →