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

WO1K callsign genealogy

Currently held by Smith, William R

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 WO1K's current licensee, walking backwards.

  1. N4DTOcancelled· E
    Smith, William RMOgranted 2016-08-05cancelled 2023-07-14
  2. KM4VJYcancelled· G
    Smith, William RNCgranted 2016-07-18cancelled 2016-08-05

Successor callsigns

Callsigns held now by people who previously held WO1K.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign WO1K, oldest first.

  • DE CESARE, JAMES P MA
    2010-11-01 → cancelled 2023-01-31
  • Smith, William R MO
    2023-07-14 active
← Back to WO1K License history →