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

NA4AT callsign genealogy

Currently held by Finger, Robert J

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 NA4AT's current licensee, walking backwards.

  1. NA4AKcancelled· E
    Finger, Robert JFLgranted 2022-12-14cancelled 2026-03-11
  2. KZ4XHcancelled· E
    Finger, Robert JFLgranted 2022-12-14cancelled 2026-02-25
  3. AC4ZXcancelled· E
    Finger, Robert JFLgranted 2022-12-14cancelled 2025-11-19
  4. KO4KOactive· E
    Henderson, Richard BKYgranted 2020-01-10
  5. KO4AGIcancelled· E
    Henderson, Richard BKYgranted 2019-11-22cancelled 2020-01-10

Successor callsigns

Callsigns held now by people who previously held NA4AT.

  1. NA4BDcancelled· E
    Finger, Robert JFLgranted 2022-12-14cancelled 2026-06-26
← Back to NA4AT License history →