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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

AK1O callsign genealogy

Currently held by Sankar, Marvin D

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 AK1O's current licensee, walking backwards.

  1. AK6UQcancelled· E
    Wnekowicz, William JCAgranted 2026-06-25cancelled 2026-07-17

Successor callsigns

Callsigns held now by people who previously held AK1O.

  1. KR5Aactive· E
    Sankar, Marvin DTXgranted 2024-06-28
  2. KT4VICactive· E
    COULTRAP, VICTOR ESCgranted 2022-03-08
  3. W1MEexpired· E
    WILLIAMS II, JOHN RMEgranted 2011-02-23cancelled 2023-02-24

All historical holders

Every license row we've seen with the callsign AK1O, oldest first.

  • VANACORE, ANTHONY J CT
    2007-01-09 → cancelled 2007-04-05
  • WILLIAMS II, JOHN R ME
    2010-07-09 → cancelled 2011-02-23
  • COULTRAP, VICTOR E SC
    2013-03-16 → cancelled 2022-03-08
  • Sankar, Marvin D TX
    2024-03-30 → cancelled 2024-06-28
  • Wnekowicz, William J CA
    2026-07-17 active
← Back to AK1O License history →