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

K0KZO 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 K0KZO's current licensee, walking backwards.

  1. NG0Kactive· E
    NUSBAUM, ANDREW CKSgranted 2019-04-16
  2. N4SCCactive· T
    Koren, AlexanderTXgranted 2025-08-01
  3. KJ5KLZcancelled· T
    Koren, AlexanderTXgranted 2025-03-08cancelled 2025-08-01

Successor callsigns

Callsigns held now by people who previously held K0KZO.

  1. KC0SOGactive· E
    Rathman, Douglas CNEgranted 2022-06-18
← Back to K0KZO License history →