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

NT3H callsign genealogy

Currently held by WIDMAIER, WILLIAM 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 NT3H's current licensee, walking backwards.

  1. KF0MDRcancelled· E
    Reddy, John GCOgranted 2023-04-07cancelled 2023-05-27

Successor callsigns

Callsigns held now by people who previously held NT3H.

  1. K3JOPactive· E
    WIDMAIER, WILLIAM RVAgranted 2022-02-08

All historical holders

Every license row we've seen with the callsign NT3H, oldest first.

  • WIDMAIER, WILLIAM R VA
    1992-11-03 → cancelled 2002-04-10
  • Krauthauser, Carl DE
    2011-04-15 → cancelled 2023-04-18
  • Reddy, John G CO
    2023-05-27 active
← Back to NT3H License history →