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

N9SO callsign genealogy

Currently held by OELKE, STEVEN 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 N9SO's current licensee, walking backwards.

  1. W9CMQcancelled· E
    Weitendorf, George WILgranted 2017-02-10cancelled 2018-12-15
  2. KC9CMQcancelled· G
    Weitendorf, George WILgranted 2002-09-27cancelled 2007-04-13

Successor callsigns

Callsigns held now by people who previously held N9SO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign N9SO, oldest first.

  • OELKE, STEVEN S WI
    2006-10-26 → cancelled 2018-11-27
  • Weitendorf, George W IL
    2018-12-15 active
← Back to N9SO License history →