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

W1OZ callsign genealogy

Currently held by BLISS, GARY C

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 W1OZ's current licensee, walking backwards.

  1. KB1Uactive· E
    FREESTON, ANDREW KNHgranted 2022-10-18
  2. KA1VYXcancelled· E
    FREESTON, ANDREW KNHgranted 2013-09-24cancelled 2022-10-18

Successor callsigns

Callsigns held now by people who previously held W1OZ.

  1. WA1SCIactive· E
    SANFORD, DAVID LMAgranted 2026-03-12
  2. NZ0Mexpired· E
    BLISS, GARY CKSgranted 2013-08-10cancelled 2025-07-05

All historical holders

Every license row we've seen with the callsign W1OZ, oldest first.

  • BLISS, GARY C KS
    1997-05-20 → cancelled 2003-07-04
  • SANFORD, DAVID L MA
    2005-07-23 → cancelled 2006-01-10
  • KOSOFF, MITCHEL A ME
    2017-11-08 active
← Back to W1OZ License history →