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Confidence: Medium · Source: FCC ULS · As of 2026-09-11

AB8TO callsign genealogy

Currently held by Zirkle, Michael 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 AB8TO's current licensee, walking backwards.

  1. KC8UTAcancelled· E
    Zirkle, Michael DOHgranted 2002-10-02cancelled 2004-10-05
  2. KB5WHJcancelled· G
    ZIRKLE, MICHAEL DOHgranted 1997-12-11cancelled 2002-09-10

Successor callsigns

Callsigns held now by people who previously held AB8TO.

No current licensee on record previously held this callsign.

← Back to AB8TO License history →