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

AA4ZT callsign genealogy

Currently held by ARMSTRONG, THOMAS 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 AA4ZT's current licensee, walking backwards.

  1. W4BATactive· G
    MASTERSON, RICHARD LKYgranted 2017-11-28
  2. W3BATactive· E
    RUBY, MARK APAgranted 2025-09-10
  3. N3KRFcancelled· E
    RUBY, MARK APAgranted 2011-09-20cancelled 2015-10-24

Successor callsigns

Callsigns held now by people who previously held AA4ZT.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign AA4ZT, oldest first.

  • ARMSTRONG, THOMAS R NC
    1991-12-24 → cancelled 2003-12-25
  • WEST, ROBERT L AL
    2025-07-16 active
← Back to AA4ZT License history →