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

KO9F callsign genealogy

Currently held by Dillmans Amateur Radio Experimenters

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 KO9F's current licensee, walking backwards.

  1. WA9VRZcancelled
    Dillmans Amateur Radio ExperimentersINgranted 2007-08-10cancelled 2011-02-23
  2. KC9JUGcancelled
    Dillmans Amateur Radio ExperimentersINgranted 2006-07-07cancelled 2007-08-10

Successor callsigns

Callsigns held now by people who previously held KO9F.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KO9F, oldest first.

  • DILLMAN, VERLIS L IN
    1999-02-03 → cancelled 2011-02-04
  • Dillmans Amateur Radio Experimenters IN
    2020-12-16 active
← Back to KO9F License history →