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

AB9YX callsign genealogy

Currently held by Johnson, Michael R

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 AB9YX's current licensee, walking backwards.

  1. KC9SDRcancelled· E
    Johnson, Michael RILgranted 2010-04-01cancelled 2011-04-13
  2. KC9RYOcancelled· G
    Johnson, Michael RILgranted 2010-04-01cancelled 2010-04-21

Successor callsigns

Callsigns held now by people who previously held AB9YX.

No current licensee on record previously held this callsign.

← Back to AB9YX License history →