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

KC0SOG callsign genealogy

Currently held by Rathman, Douglas C

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 KC0SOG's current licensee, walking backwards.

  1. K0KZOcancelled· E
    Rathman, Douglas CNEgranted 2017-03-24cancelled 2022-06-18
  2. NG0Kactive· E
    NUSBAUM, ANDREW CKSgranted 2019-04-16
  3. N4SCCactive· T
    Koren, AlexanderTXgranted 2025-08-01
  4. KJ5KLZcancelled· T
    Koren, AlexanderTXgranted 2025-03-08cancelled 2025-08-01

Successor callsigns

Callsigns held now by people who previously held KC0SOG.

  1. NG0Kcancelled· E
    Rathman, Douglas CNEgranted 2015-10-30cancelled 2017-03-24

All historical holders

Every license row we've seen with the callsign KC0SOG, oldest first.

  • Rathman, Douglas C NE
    2004-06-07 → cancelled 2006-01-21
  • Rathman, Douglas C NE
    2022-06-18 active
← Back to KC0SOG License history →