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

N1CZ callsign genealogy

Currently held by De Giorgio, John A

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 N1CZ's current licensee, walking backwards.

  1. KC1LNHcancelled· E
    De Giorgio, John AMAgranted 2019-06-03cancelled 2020-03-17

Successor callsigns

Callsigns held now by people who previously held N1CZ.

  1. NE1Ucancelled· E
    WALDEN, JEFFREY LMIgranted 2018-02-27cancelled 2020-09-29
  2. KK2CWcancelled· E
    DUDEK, PAVELMAgranted 2014-07-25cancelled 2016-08-02

All historical holders

Every license row we've seen with the callsign N1CZ, oldest first.

  • DUDEK, PAVEL MA
    2013-10-18 → cancelled 2014-07-25
  • WALDEN, JEFFREY L CT
    2016-08-13 → cancelled 2018-02-27
  • De Giorgio, John A MA
    2020-03-17 active
← Back to N1CZ License history →