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

KC3O callsign genealogy

Currently held by Busse, Scott

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 KC3O's current licensee, walking backwards.

  1. KC3MEcancelled· E
    RADCLIFFE JR, WILLIAM EFLgranted 2013-10-22cancelled 2020-01-14
  2. N8CYR
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held KC3O.

  1. KT4Lactive· E
    Busse, ScottFLgranted 2023-08-16
  2. K4SIactive· E
    Cowart, Ted UALgranted 2017-10-03

All historical holders

Every license row we've seen with the callsign KC3O, oldest first.

  • KLINGENSMITH, CYRUS M PA
    1999-02-10 → cancelled 2011-02-11
  • Busse, Scott FL
    2011-09-27 → cancelled 2013-08-13
  • Cowart, Ted U AL
    2015-09-01 → cancelled 2017-10-03
  • RADCLIFFE JR, WILLIAM E FL
    2020-01-14 active
← Back to KC3O License history →