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

W9KEY callsign genealogy

Currently held by Schwierske, Frederick C

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 W9KEY's current licensee, walking backwards.

  1. KD9KOYcancelled· G
    Schwierske, Frederick CWIgranted 2018-03-29cancelled 2018-04-28

Successor callsigns

Callsigns held now by people who previously held W9KEY.

  1. W9RNDcancelled· E
    JOHNSTON, ROBERT WINgranted 2015-09-29cancelled 2017-02-04
  2. W9CQcancelled· E
    Moldenhauer, Robert CWIgranted 2007-04-21cancelled 2006-01-01

All historical holders

Every license row we've seen with the callsign W9KEY, oldest first.

  • Moldenhauer, Robert C WI
    2000-01-13 → cancelled 2007-04-21
  • JOHNSTON, ROBERT W IN
    2014-10-04 → cancelled 2015-09-29
  • Schwierske, Frederick C WI
    2018-04-28 active
← Back to W9KEY License history →