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

NT1W callsign genealogy

Currently held by Duffy, Jonathan 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 NT1W's current licensee, walking backwards.

  1. AK4NLcancelled· E
    Duffy, Jonathan RVAgranted 2019-11-13cancelled 2021-04-16
  2. KJ4RKAcancelled· E
    Duffy, Jonathan RVAgranted 2009-12-23cancelled 2011-10-17

Successor callsigns

Callsigns held now by people who previously held NT1W.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign NT1W, oldest first.

  • CIVITELLO, SYLVESTER P CT
    1998-05-22 → cancelled 2010-05-25
  • Vrooman, Aaron NH
    2010-09-14 → cancelled 2019-03-27
  • Duffy, Jonathan R ME
    2021-04-16 active
← Back to NT1W License history →