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

WS0I callsign genealogy

Currently held by DICKINSON, BILLY L

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 WS0I's current licensee, walking backwards.

  1. KQ4ILGcancelled· E
    Kroll, Richard KFLgranted 2016-03-10cancelled 2023-08-08
  2. KG5MEScancelled· G
    Kroll, Richard KFLgranted 2016-03-10cancelled 2023-05-11

Successor callsigns

Callsigns held now by people who previously held WS0I.

  1. K0TNTactive· E
    Dickinson, Billy LKSgranted 2021-07-20

All historical holders

Every license row we've seen with the callsign WS0I, oldest first.

  • MEDFORD, MICHAEL S CO
    1999-01-05 → cancelled 2011-01-06
  • DICKINSON, BILLY L KS
    2011-09-27 → cancelled 2021-07-20
  • Kroll, Richard K FL
    2023-08-08 active
← Back to WS0I License history →