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

W1TAT callsign genealogy

Currently held by Nelson, Carl F

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 W1TAT's current licensee, walking backwards.

  1. K1TATcancelled· G
    Winczewski, Christopher FMAgranted 2016-08-02cancelled 2021-07-24
  2. KD1TATcancelled· T
    Winczewski, Christopher FMAgranted 2016-04-16cancelled 2016-08-02
  3. KC1FCVcancelled· T
    Winczewski, Christopher FMAgranted 2016-02-25cancelled 2016-04-16

Successor callsigns

Callsigns held now by people who previously held W1TAT.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W1TAT, oldest first.

  • NUTTING, THOMAS L MA
    1999-01-13 → cancelled 2001-10-01
  • Nelson, Carl F MA
    2009-06-19 → cancelled 2021-06-22
  • Winczewski, Christopher F MA
    2021-07-24 active
← Back to W1TAT License history →