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

W0WS callsign genealogy

Currently held by Nelson, Mark S

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 W0WS's current licensee, walking backwards.

  1. W9MNactive· E
    Maseda, Michael VWIgranted 2021-04-30
  2. K4YSNcancelled· E
    Maseda, MichaelFLgranted 2021-03-13cancelled 2021-04-30
  3. KO4MZZcancelled· E
    Maseda, MichaelFLgranted 2021-02-23cancelled 2021-03-13

Successor callsigns

Callsigns held now by people who previously held W0WS.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W0WS, oldest first.

  • SADLER, WILLIAM S MN
    1997-01-29 → cancelled 2003-06-16
  • Wenzlaff, Wayne O MN
    2007-03-20 → cancelled 2019-03-21
  • Nelson, Mark S CO
    2019-04-09 active
← Back to W0WS License history →