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

K9OES callsign genealogy

Currently held by Bringolf, Robert A

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 K9OES's current licensee, walking backwards.

  1. W6HPWcancelled· T
    Bringolf, Robert ACAgranted 2019-06-18cancelled 2019-09-06
  2. KN6CGIcancelled· T
    Bringolf, Robert ACAgranted 2019-05-29cancelled 2019-06-18

Successor callsigns

Callsigns held now by people who previously held K9OES.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K9OES, oldest first.

  • EDITZ, FRANK IN
    1988-04-12 → cancelled 2000-04-13
  • CALIFORNIA EMERGENCY SERVICES RADIO ASSN CA
    2000-06-20 → cancelled 2012-06-21
  • Bringolf, Robert A CA
    2019-09-06 active
← Back to K9OES License history →