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

AC9OR callsign genealogy

Currently held by Ventresca, Kenneth M

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 AC9OR's current licensee, walking backwards.

  1. KF8RScancelled· E
    ROGERS III, CLARENCE OILgranted 2011-11-08cancelled 2020-03-14

Successor callsigns

Callsigns held now by people who previously held AC9OR.

  1. AC1VVcancelled· E
    Ventresca, Kenneth MFLgranted 2016-06-25cancelled 2017-08-15

All historical holders

Every license row we've seen with the callsign AC9OR, oldest first.

  • Ventresca, Kenneth M IN
    2015-10-06 → cancelled 2016-06-25
  • ROGERS III, CLARENCE O IL
    2020-03-14 active
← Back to AC9OR License history →