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

KC9WF callsign genealogy

Currently held by Adamski, Jason J

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 KC9WF's current licensee, walking backwards.

  1. AC9YBcancelled· E
    Adamski, Jason JWIgranted 2012-06-25cancelled 2021-02-17
  2. KC9WFFcancelled· E
    Adamski, Jason JWIgranted 2012-06-25cancelled 2021-01-29

Successor callsigns

Callsigns held now by people who previously held KC9WF.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KC9WF, oldest first.

  • BECKER, MARVIN K IL
    1997-06-23 → cancelled 2009-06-24
  • Adamski, Jason J MN
    2021-02-17 active
← Back to KC9WF License history →