uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-14

W1OI callsign genealogy

Currently held by WEINSTOCK, DAVID E

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 W1OI's current licensee, walking backwards.

  1. WG1Ractive· E
    Rubin, Gary RFLgranted 2025-02-04
  2. KC0SCHcancelled· E
    Rubin, Gary RCOgranted 2004-04-13cancelled 2005-04-29

Successor callsigns

Callsigns held now by people who previously held W1OI.

  1. W1HNactive· E
    WATT, WILLIAM GMAgranted 2019-05-13

All historical holders

Every license row we've seen with the callsign W1OI, oldest first.

  • WEINSTOCK, DAVID E VT
    2022-03-08 active
  • —
    — → cancelled 1999-08-02
← Back to W1OI License history →