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

KR9BH callsign genealogy

Currently held by HUMMER, WILLIAM D

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 KR9BH's current licensee, walking backwards.

  1. N9FXWactive· G
    HUMMER, ROBERT AINgranted 2018-01-17
  2. KC9CTUcancelled· G
    HUMMER, ROBERT AINgranted 2012-09-05cancelled 2018-01-17

Successor callsigns

Callsigns held now by people who previously held KR9BH.

  1. KO9Rcancelled· E
    HUMMER, WILLIAM DINgranted 2004-01-31cancelled 2005-03-15
← Back to KR9BH License history →