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

AB9RC callsign genealogy

Currently held by Klein, William C

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 AB9RC's current licensee, walking backwards.

  1. AB9PXcancelled· E
    Klein, William CWIgranted 2007-05-29cancelled 2008-01-15
  2. KC9LRGcancelled· E
    Klein, William CWIgranted 2007-05-29cancelled 2007-11-26

Successor callsigns

Callsigns held now by people who previously held AB9RC.

  1. KM9Tactive· E
    KLEIN, WILLIAM CWIgranted 2020-04-20
← Back to AB9RC License history →