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

NT4Z callsign genealogy

Currently held by MANCOS, STEPHEN 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 NT4Z's current licensee, walking backwards.

  1. KN4HPJcancelled· E
    MANCOS, STEPHEN JNCgranted 2017-11-14cancelled 2021-07-24

Successor callsigns

Callsigns held now by people who previously held NT4Z.

  1. KD4CXcancelled· E
    HENDERSON, ROBERT WFLgranted 2019-07-02cancelled 2021-03-09

All historical holders

Every license row we've seen with the callsign NT4Z, oldest first.

  • Armstrong, Hugh FL
    2002-03-25 → cancelled 2011-11-08
  • HENDERSON, ROBERT W FL
    2013-11-30 → cancelled 2019-07-02
  • MANCOS, STEPHEN J NC
    2021-07-24 active
← Back to NT4Z License history →