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

W1SY callsign genealogy

Currently held by WARZOCHA, ROBERT L

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 W1SY's current licensee, walking backwards.

  1. N3YSactive· E
    Rutherford, DanielPAgranted 2021-04-20
  2. AA3Gactive· E
    BADRACHALAM, RAVITXgranted 2023-04-07
  3. AC5JFcancelled· E
    BADRACHALAM, RAVITXgranted 2003-12-30cancelled 2013-06-21
  4. KC5BRK
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held W1SY.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W1SY, oldest first.

  • WARZOCHA, ROBERT L CT
    1997-04-19 → cancelled 2009-04-21
  • IKEDA, TOSHIKAZU CA
    2019-04-20 active
← Back to W1SY License history →