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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

AA9YI callsign genealogy

Currently held by Olmstead, Brian S

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 AA9YI's current licensee, walking backwards.

  1. KG9PWcancelled· A
    OLMSTEAD, BRIAN SINgranted 1999-06-14cancelled 2000-05-25
  2. KB9UOGcancelled· P
    OLMSTEAD, BRIAN Scancelled 1999-06-14

Successor callsigns

Callsigns held now by people who previously held AA9YI.

  1. W9BYactive· E
    Olmstead, Brian SWIgranted 2020-04-07
← Back to AA9YI License history →